Team:TU Darmstadt/Labjournal/Transport

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    <li><a href="/Team:TU_Darmstadt/Downloads" title="Downloads">Downloads</a></li></ul></li>
    <li><a href="/Team:TU_Darmstadt/Downloads" title="Downloads">Downloads</a></li></ul></li>
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<li><a href="/Team:TU_Darmstadt/Human_Practice" title="Human Practice">Human Practice</a><ul>
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<li><a href="/Team:TU_Darmstadt/Human_Practice" title="Human Practice">Human Practice</a></li>   
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    <li><a href="/Team:TU_Darmstadt/Human_Practice/Panel_Discussion " title="Panel Discussion">Panel Discussion</a></li>
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    <li><a href="/Team:TU_Darmstadt/Human_Practice/Symposia" title="Symposia">Symposia</a></li>
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    <li><a href="/Team:TU_Darmstadt/Human_Practice/Classes" title="Classes">Classes</a></li></ul></li>   
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<li><a href="/Team:TU_Darmstadt/Sponsors" title="Sponsors">Sponsors</a><ul>
<li><a href="/Team:TU_Darmstadt/Sponsors" title="Sponsors">Sponsors</a><ul>
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===Overview===
===Overview===
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This lab journal describes a isolation and characterisation of the putative terephtalate (TPA) uptake system from [http://www.dsmz.de/catalogues/details/culture/DSM-14576.html?tx_dsmzresources_pi5%5BreturnPid%5D=304''Comamonas testosteroni KF-1''] (''C. testosteroni'') in ''Escherichia Coli'' (''E.Coli''). The putative terephtalate system consist of three different domain, two alpha-helical transmembrane protein  (11-12 and 4-5  alpha-helical transmembrane protein) and one periplasmic terephtalate  binding protein. The strain was purchased from [http://www.dsmz.de/ DMSZ]-German Collection of Microorganism and Cell Cultures (DMSZ no.14576). We designed two putative TPA uptake operons and the intake of TPA was checked by photometry, gas chromatography-mass spectrometry (GC-MS) and energy dispersive X-ray spectroscopy (EDX).  
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This lab journal describes an isolation and characterisation of the putative terephtalate (TPA) uptake system from [http://www.dsmz.de/catalogues/details/culture/DSM-14576.html?tx_dsmzresources_pi5%5BreturnPid%5D=304''Comamonas testosteroni KF-1''] (''C. testosteroni'') in ''Escherichia Coli'' (''E.Coli''). The putative terephtalate system consist of three different domain, two alpha-helical transmembrane protein  (11-12 and 4-5  alpha-helical transmembrane protein) and one periplasmic terephtalate  binding protein. The strain was purchased from [http://www.dsmz.de/ DMSZ]-German Collection of Microorganism and Cell Cultures (DSMZ no.14576). We designed two putative TPA uptake operons and the intake of TPA was checked by photometry, gas chromatography-mass spectrometry (GC-MS) and energy dispersive X-ray spectroscopy (EDX).  
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=====How we constructed our Biobricks=====
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[[Image:Klonierung.png|thumb|none|900px|Overview: How we constructed our Biobricks]]
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[[Image:Klonierung.png|thumb|none|900px|Overview of Biobrick construction]]
===Week 1 (21.-25.05.12)===
===Week 1 (21.-25.05.12)===
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===week 2 (28.05.-01.06.12)===
===week 2 (28.05.-01.06.12)===
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* Purified products from 1. week were [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligated] into pSB1A2 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformed] into DH5a (in spite of low concentration)
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* Purified products from 1. week were [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligated] into pSB1A2 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformed] into DH5a (in spite of low concentration)
* Overnight incubation on LB agar plates; no growth detectable
* Overnight incubation on LB agar plates; no growth detectable
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* Dephosphorylation of the restriction reactions by using antarctic Phosphatase
* Dephosphorylation of the restriction reactions by using antarctic Phosphatase
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of the five genes into pSB1A2 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a (incubation at 37°C)
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of the five genes into pSB1A2 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a (incubation at 37°C)
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), 2 approaches (Primers:[https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick])
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), 2 approaches (Primers:[https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick])
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:Because of low concentration and contamination the PCR was repeated and the product was purified again by the Promega-Kit.
:Because of low concentration and contamination the PCR was repeated and the product was purified again by the Promega-Kit.
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* Performing a [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR]-screen of the transformed cells using the Taq-Polymerase. Verification of 4 colonies per plate. (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick])
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* Performing a [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR]-screen of the transformed cells using a homemade Taq-Polymerase. Verification of 4 colonies per plate. (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick])
:PCR did not work
:PCR did not work
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* Testing the Taq-Polymerase for function. The Phu-Polymerase was used for comparison. Only the approach using the Phu-Polymerase showed the expected bands in [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis].
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* Testing the homemade Taq-Polymerase for function. The Phu-Polymerase was used for comparison. Only the approach using the Phu-Polymerase showed the expected bands in [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis].
:[[Image:W3_2_taq-phu_s27.2.png|thumb|none|px|only the Phu-approach showed the expected bands. Marker: 1kb DNA ladder, NEB]]
:[[Image:W3_2_taq-phu_s27.2.png|thumb|none|px|only the Phu-approach showed the expected bands. Marker: 1kb DNA ladder, NEB]]
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of purified PCR products (2), (3) and (4) using SpeI and EcoRI
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of purified PCR products (2), (3) and (4) using SpeI and EcoRI
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of the digested genes ((2), (3), (4)) into pSB1A2 and pSB1C3
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of the digested genes ((2), (3), (4)) into pSB1A2 and pSB1C3
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of DH5a with pSB1A2_197, pSB1A2_503, pSB1A2_162, pSB1C3_197, pSB1C3_503, pSB1C3_162 (6 different transformation approaches). Overnight incubation at 37°C
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of DH5a with pSB1A2_197, pSB1A2_503, pSB1A2_162, pSB1C3_197, pSB1C3_503, pSB1C3_162 (6 different transformation approaches). Overnight incubation at 37°C
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[[Image:W4_5_ligation%2BkoloPCR505-322.png|thumb|none|250px|Colony-PCR products of gene 1 and 5. [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] shows only the band of the undesired smaller product. Product of the ligation of 2,3 and 4 into pSB1A2 and pSC1C3]]
[[Image:W4_5_ligation%2BkoloPCR505-322.png|thumb|none|250px|Colony-PCR products of gene 1 and 5. [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] shows only the band of the undesired smaller product. Product of the ligation of 2,3 and 4 into pSB1A2 and pSC1C3]]
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] into pSB1A2 and pSB1C3
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] into pSB1A2 and pSB1C3
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of DH5a with pSB1A2_322 und pSB1C3_322. [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]) used to check for successful transformation<!-- bild fehlt!! -->
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of DH5a with pSB1A2_322 und pSB1C3_322. [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]) used to check for successful transformation<!-- bild fehlt!! -->
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===week 6 (25.-29.06.12)===
===week 6 (25.-29.06.12)===
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* Further [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of ''Comamonas t.'' (3 approaches) and [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] with genomic ''Comamonas t.'' DNA as template to obtain [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), 2 approaches each (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]). Subsequent analisys of the PCR products by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]. All PCR of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] show only the band of the undesired smaller product.
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* Further [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of ''C.testosteroni.'' (3 approaches) and [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] with genomic ''C. testosteroni.'' DNA as template to obtain [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), 2 approaches each (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]). Subsequent analisys of the PCR products by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]. All PCRs of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] show only the band of the undesired smaller product.
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] off the digested genes into pSB1A2 and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a. Overnight incubation at 37°C
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] off the digested genes into pSB1A2 and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a. Overnight incubation at 37°C
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR Colony-PCR] of ''Comamonas t.'' and [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] with genomic DNA of ''Comamonas t.'' as template to obtain [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1). [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tctB 197aa] (2), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808002 tctA_503aa] (3), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tctB 162aa] (4), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) used as control (Primers:  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick])
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR Colony-PCR] of ''C. testosteroni.'' and [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] with genomic DNA of ''C. testosteroni.'' as template to obtain [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1). [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tctB 197aa] (2), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808002 tctA_503aa] (3), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tctB 162aa] (4), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) used as control (Primers:  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick])
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:[[Image:W6_1_PCR_505.png|thumb|none|300px|Marker: Lambda DNA/Eco471 Maker]]
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:[[Image:W6_1_PCR_505.png|thumb|none|300px|Finally a colony-PCR of C. testosteroni showed a second band on agarose gel electrophoresis. Marker: Lambda DNA/Eco471 Maker]]
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:The upper bands were cut and purified by Promega kit. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] using SpeI and EcoRI.
* Miniprep and Nanodrop measurement of:
* Miniprep and Nanodrop measurement of:
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* Checking the Miniprep with [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]) and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]
* Checking the Miniprep with [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]) and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]
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:[[File:W6_2_miniprep.png]]
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:[[Image:W6_2_miniprep.png|thumb|none|400px|All PCRs of miniprep showed a product. Marker: 1kb DNA ladder, NEB]]
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR Colony-PCR]-Screen of the transformants (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]) and analisys of the PCR products by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR Colony-PCR]-Screen of the transformants (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]) and analisys of the PCR products by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]
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:No bands visible
:No bands visible
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] into pSB1C3 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a. No colonies
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] into pSB1C3 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a. No colonies
*  The following vectors were sequenced: pSB1A2_197.4, pSB1A2_197.5, psSB1A2_503.1, pSB1A2_503.4, pSB1A2_162.2, pSB1C3_162.6, pSB1A2_322.12, pSB1A2_322.13
*  The following vectors were sequenced: pSB1A2_197.4, pSB1A2_197.5, psSB1A2_503.1, pSB1A2_503.4, pSB1A2_162.2, pSB1C3_162.6, pSB1A2_322.12, pSB1A2_322.13
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] using EcoRI/SpeI. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] into  pSB1C3 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a.
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* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] using EcoRI/SpeI. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] into  pSB1C3 and subsequently [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a.
* Preperations for pure culture: [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of A2.4, A2.5, A3.1, A3.4, A4.2, C4.6, A5.12, A5.13 (2 colonies each, Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]) and afterwards checking the PCR products by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]. Positive colonies were picked, streaked onto fresh media and incubated again.
* Preperations for pure culture: [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of A2.4, A2.5, A3.1, A3.4, A4.2, C4.6, A5.12, A5.13 (2 colonies each, Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick],  [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197 tctB_197 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]) and afterwards checking the PCR products by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]. Positive colonies were picked, streaked onto fresh media and incubated again.
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* As A5.12 and A5.13 are missing the right insert the [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] was repeated (5 and 6 colonies were used, Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]). To provide additional monitoring the [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] was repeated for A2.5_2, A3.1_2 und A4.2_2. 2 positive colonies were again streaked onto fresh media.
* As A5.12 and A5.13 are missing the right insert the [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] was repeated (5 and 6 colonies were used, Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]). To provide additional monitoring the [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] was repeated for A2.5_2, A3.1_2 und A4.2_2. 2 positive colonies were again streaked onto fresh media.
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* The Arabinose-Promotor ([http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara]) was isolated from pbad_turbo_gfp and colonies containing this plasmid (3 approaches each). Approach  T2 is further in use.
+
* The Arabinose-Promotor ([http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara]) was isolated from pbad_turbo_gfp and colonies containing this plasmid (3 approaches each).
-
:[[File:W6_3_ara.png|250px]]
+
:[[Image:W6_3_ara.png|thumb|none|250px|Isolation of Ara. Approach T2 is further in use. Marker: 1kb DNA ladder, NEB]]
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 +
====Results====
 +
* Finally we made it to isolate gene 1 form a colony of ''C. testosteroni'', but transformation didn't work
 +
* Miniprep of the other genes, and sequencing
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* Isolation of Ara
===week 7 (02.-06.07.12)===
===week 7 (02.-06.07.12)===
Line 381: Line 383:
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] and pXylE using EcoRI and SpeI. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of the restricted products and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into  DH5a. No colonies
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] and pXylE using EcoRI and SpeI. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of the restricted products and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into  DH5a. No colonies
-
:[[File:W7_1_ara_restriktion.png|250px]]
+
:[[Image:W7_1_ara_restriktion.png|thumb|none|250px|Restriction digest of Ara. Marker: 1kb DNA ladder, NEB]]
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1A2 using EcoRI and SpeI
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1A2 using EcoRI and SpeI
Line 388: Line 390:
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/mutagenic_PCR Mutagenic PCR] of A4.2, A5.13, A3.1 to eliminate the PstI restriction site (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503#tctA503_Pst1 tctA_503_PstI], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162#tctB162_Pst1 tctB_162_PstI], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC#tphC_Pst1 tphC_PstI]). [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] into DH5a
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/mutagenic_PCR Mutagenic PCR] of A4.2, A5.13, A3.1 to eliminate the PstI restriction site (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503#tctA503_Pst1 tctA_503_PstI], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162#tctB162_Pst1 tctB_162_PstI], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC#tphC_Pst1 tphC_PstI]). [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] into DH5a
-
* Checking the DH5a-cells for correct transformation with the vectors after the mutagenic PCR by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (checking 7 colonies each, Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]). The PCR products were [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest digested] with PstI. The gel was alternately loaded with digested and uncut PCR products.
+
* Checking the DH5a-cells for correct transformation with the vectors after the mutagenic PCR by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (checking 7 colonies each, Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162 tctB_162 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tphC tphC Biobrick]). The PCR products were [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest digested] with PstI.
-
:[[File:W7_2_trafo_mit_mut.jpg]]
+
:[[Image:W7_2_trafo_mit_mut.png|thumb|none|500px|Restriction digest of the genes after mutagenic PCR. The gel was alternately loaded with digested unmutated and digested mutated PCR products. Marker: 1kb DNA ladder, NEB]]
* The transformation of DH5a with pSB1C3_tctA_505aa was verified by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]). The positive colonies were used for Miniprep
* The transformation of DH5a with pSB1C3_tctA_505aa was verified by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]). The positive colonies were used for Miniprep
Line 439: Line 441:
* new [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] of DH5a with pXylE_Ara
* new [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] of DH5a with pXylE_Ara
 +
 +
====Results====
 +
* First transformation of Ara into DH5a didn't work
 +
* Successfull mutagenic PCR of genes 3, 4 and 5 (gene 2 didn't has a PstI Restriction site)
 +
* Successfull transformation of DH5a with tctA 505aa
 +
* Second transformation of DH5a with pXylE_Ara
===week 8 (09.-13.07.12)===
===week 8 (09.-13.07.12)===
-
* Checking the transformation of DH5a with pSB1C3_tctA_505aa again using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]) [*]. The colonies Nr. 2, 8 and 10 were picked and streaked onto fresh media.
+
* Checking the transformation of DH5a with pSB1C3_tctA_505aa again using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]) (data not shown). The colonies Nr. 2, 8 and 10 were picked and streaked onto fresh media.
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of DH5a_pXylE_Ara (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS], no positve colonies, data not shown)
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of DH5a_pXylE_Ara (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS], no positve colonies, data not shown)
Line 451: Line 459:
* Checking the transformation of DH5a with pSB1C3_tctA_505aa again by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]). Only the colonies Nr. 2, 8 and 10 (see above) were checked (2 colonies each).
* Checking the transformation of DH5a with pSB1C3_tctA_505aa again by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick]). Only the colonies Nr. 2, 8 and 10 (see above) were checked (2 colonies each).
-
:[[File:W8_3_kolo_pcr_505.png|250px]]
+
:[[Image:W8_3_kolo_pcr_505.png|thumb|none|250px|Colony-PCR of colonies 2,8 and 10 from transformation with tctA 505aa. Marker: 1kb DNA ladder, NEB]]
-
* Another [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of DH5a_pXy19_Ara (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS])
+
* Another [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] of DH5a_pXy19_Ara (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS]). The positive colonies were used for fluid culture (data not shown).
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
Line 469: Line 477:
:A4.2m_4 : 124.8 ng/µl 260/280= 1.85
:A4.2m_4 : 124.8 ng/µl 260/280= 1.85
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of A5.13m_2, A5.13m_3, A3.1m_1, A3.1m_5, A2.5, A4.2m_4 with EcoRI and SpeI. The restriction was done to enable the [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] of the mutated genes into pSB1C3. Afterwards DH5a was [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformed] with the ligation product.
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of A5.13m_2, A5.13m_3, A3.1m_1, A3.1m_5, A2.5, A4.2m_4 with EcoRI and SpeI. The restriction was done to enable the [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] of the mutated genes into pSB1C3. Afterwards DH5a was [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformed] with the ligation product.
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
Line 483: Line 491:
:C505_10_3 : 160.4 ng/µl 260/280= 1.98
:C505_10_3 : 160.4 ng/µl 260/280= 1.98
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of the Miniprep products with EcoRI and EcoRI/SpeI. Afterwards the restriction products were analyzed by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis]. Gel loading: uncut, cut once, cut twice
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of the Miniprep products with EcoRI and EcoRI/SpeI. Afterwards the restriction products were analyzed by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Agarose_gel_electrophoresis Agarose gel electrophoresis].  
-
:https://static.igem.org/mediawiki/2012/7/7e/W8_4_restriktion_505.png
+
:[[Image:W8_4_restriktion_505.png|thumb|none|600px|Restriction of miniprep. Gel loading: uncut, cut once, cut twice. C505_2_3 und C505_8_2 were selected for mutagenic PCR. Marker: 1kb DNA ladder, NEB]]
-
 
+
-
:C505_2_3 und C505_8_2 were selected for mutagenic PCR.
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3 with EcoRI and SpeI
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3 with EcoRI and SpeI
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pXylE with EcoRI and XbaI and of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] with EcoRI and SpeI. Dephosphorylation of pXylE. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of pXylE and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara]
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pXylE with EcoRI and XbaI and of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] with EcoRI and SpeI. Dephosphorylation of pXylE. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of pXylE and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara]
-
 
+
 +
====Results====
 +
* Miniprep of the DH5a-Colonies with the mutated genes and restriction analysis
 +
* Sequencing of the mutated genes
 +
* Amplification and restriction of gene 2, 3, 4 and 5 for Ligation into pSB1C3
 +
* Successfull isolation of Ara, Ligation with XylE
===week 9 (16.-20.07.12)===
===week 9 (16.-20.07.12)===
Line 501: Line 511:
* [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tct_B162m] and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tct_B197m] with primer to add a RBS in front and behind the gene (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162#tctB162_RBS tctB_162_RBS], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197#tctB197_RBS tctB_197_RBS])
* [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tct_B162m] and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tct_B197m] with primer to add a RBS in front and behind the gene (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB162#tctB162_RBS tctB_162_RBS], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctB197#tctB197_RBS tctB_197_RBS])
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of the PCR products with EcoRI and SpeI for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] into pSB1C3_5.13m (tphC)
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of the PCR products with EcoRI and SpeI for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] into pSB1C3_5.13m (tphC)
* Adding a RBS to one site of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] using [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS])
* Adding a RBS to one site of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] using [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS])
Line 517: Line 527:
:C5.13m_2 : 60.8 ng/µl 260/280= 1.89
:C5.13m_2 : 60.8 ng/µl 260/280= 1.89
-
 
+
====Results====
 +
* We added successfully a RBS in front and behind gene 2 and 4
 +
* We added successfully a RBS on Ara
 +
* First mutagenic PCR on gene 1 didn't work
===week 10 (23.-27.07.12)===
===week 10 (23.-27.07.12)===
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_5.13m_3_2 and pSB1C3_5.13m_3_3 with EcoRI and XbaI. Afterwards the products are [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligated] with RBS_tctB162m_RBS and RBS_tctB197_RBS each.
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_5.13m_3_2 and pSB1C3_5.13m_3_3 with EcoRI and XbaI. Afterwards the products are [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligated] with RBS_tctB162m_RBS and RBS_tctB197_RBS each.
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of A3.1m_1 for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] with Ara
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of A3.1m_1 for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] with Ara
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction] of pXylE for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] with Ara_RBS
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction] of pXylE for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] with Ara_RBS
-
* [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] of Ara_RBS and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] into pXylE and pSB1C3 (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS]). Afterwards [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest restriction digest] with restriction enzymes: Ara_RBS is cut with with EcoRI and SpeI and Ara is cut with EcoRI and XbaI
+
* [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] of Ara_RBS and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] for [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] into pXylE and pSB1C3 (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/Ara_RBS Ara_RBS]). Afterwards [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest restriction digest] with restriction enzymes: Ara_RBS is cut with with EcoRI and SpeI and Ara is cut with EcoRI and XbaI
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of the restricted PCR-products to:  pSB1A2_tctB197_tphCm, pSB1C3_tctB162m_tphCm, pSB1C3_tct197_tphCm, pSB1A2_tctB162m_tphCm, pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_Ara_XylE and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into  DH5a
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of the restricted PCR-products to:  pSB1A2_tctB197_tphCm, pSB1C3_tctB162m_tphCm, pSB1C3_tct197_tphCm, pSB1A2_tctB162m_tphCm, pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_Ara_XylE and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into  DH5a
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/mutagenic_PCR mutagenic PCR] of 505_8_2 (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505#tctA505_Pst1 tctA_505_PstI])
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/mutagenic_PCR mutagenic PCR] of 505_8_2 (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505#tctA505_Pst1 tctA_505_PstI])
-
 
+
====Results====
 +
* Ligation of gene RBS_2_RBS and RBS_4_RBS with gene 5 and transformation into DH5a
 +
* Ligation of gene 3 with Ara_RBS and transformation into DH5a
 +
* Mutagenic PCR of gene 1
===week 11 (30.07.-03.08.12)===
===week 11 (30.07.-03.08.12)===
Line 555: Line 571:
:pSB1C3_tct197_tphC : 30.6 ng/µl 260/280= 1.88
:pSB1C3_tct197_tphC : 30.6 ng/µl 260/280= 1.88
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm and building the final constructs by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation]: pSB1A2_tctA503m_tctB162m_tphCm und pSB1C3_tctA503m_tctB162m_tphCm. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of the final constructs into DH5a.
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm and building the final constructs by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation]: pSB1A2_tctA503m_tctB162m_tphCm und pSB1C3_tctA503m_tctB162m_tphCm. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of the final constructs into DH5a.
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of pSB1C3_503 into DH5a
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation Transformation] of pSB1C3_503 into DH5a
Line 561: Line 577:
*  Checking the mutagenic PCR product of 505_8_2 and the transformation of DH5a with pSB1C3_503 by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick])
*  Checking the mutagenic PCR product of 505_8_2 and the transformation of DH5a with pSB1C3_503 by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505 tctA_505 Biobrick], [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA503 tctA_503 Biobrick])
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] und C4.2_4_1 using EcoRI and PstI, building pSB1C3_Ara by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] of the vector into DH5a
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] und C4.2_4_1 using EcoRI and PstI, building pSB1C3_Ara by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] of the vector into DH5a
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
Line 571: Line 587:
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_505m with PstI. Checking if the restriction site has been successfully removed
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_505m with PstI. Checking if the restriction site has been successfully removed
-
:[[File:W11_1_rest_mut_505.jpg|100px]]
+
:[[Image:W11_1_rest_mut_505.jpg|thumb|none|100px|Restriction digest of tctA 505aa after mutagenic PCR. The gel was alternately loaded with digested and uncut PCR products. Restriction site hasn't been removed. Marker: 1kb DNA ladder, NEB]]
-
:restriction site hasn't been removed
+
* Screening for transformation of DH5a with pSB1A2_tctA503m_tctB162m_tphCm and pSB1C3_tctA503m_tctB162m_tphCm using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
-
* Screnning for transformation of DH5a with pSB1A2_tctA503m_tctB162m_tphCm and pSB1C3_tctA503m_tctB162m_tphCm using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR]) [*]
+
* Checking the constructs pSB1A2/pSB1C3_Ara_503m and pSB1A2/pSB1C3_tctB162m_tphCm by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
-
* Checking the constructs pSB1A2/pSB1C3_Ara_503m and pSB1A2/pSB1C3_tctB162m_tphCm by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR]) [*]
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] into pSB1C3
-
 
+
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] into pSB1C3
+
* Checking if pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm have the right Prefix/Suffix by digesting both with EcoRI and XbaI and with EcoRI and PstI [*]
* Checking if pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm have the right Prefix/Suffix by digesting both with EcoRI and XbaI and with EcoRI and PstI [*]
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm with Ara_503
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm with Ara_503
*  Miniprep (Fermentas Kit) and Nanodrop measurement of:
*  Miniprep (Fermentas Kit) and Nanodrop measurement of:
Line 601: Line 615:
:pSB1C3_tctB162m_tphCm_5 : 89.8 ng/µl 260/280= 1.85
:pSB1C3_tctB162m_tphCm_5 : 89.8 ng/µl 260/280= 1.85
 +
* Sequencing pSB1A2_tctB162m_tphCm_2 and pSB1C3_tctB162m_tphCm_5
 +
 +
====Results====
 +
* Restriction of the construct build in week 10 and ligation to the final construct Operon 1. Transformation into DH5a
 +
* We checked the mutagenic PCR of gene 1. The restriction site wasn't removed
 +
* Ligation of gene 3 into pSB1C3
 +
* Ligation of Ara into pSB1C3
* Sequencing pSB1A2_tctB162m_tphCm_2 and pSB1C3_tctB162m_tphCm_5
* Sequencing pSB1A2_tctB162m_tphCm_2 and pSB1C3_tctB162m_tphCm_5
Line 613: Line 634:
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/mutagenic_PCR Mutagenic PCR] of pSB1C3_505_8_2 (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505#tctA505_Pst1 tctA_505_PstI]) and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/mutagenic_PCR Mutagenic PCR] of pSB1C3_505_8_2 (Primers: [https://2012.igem.org/Team:TU_Darmstadt/Materials/tctA505#tctA505_Pst1 tctA_505_PstI]) and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of Ara_503m with pSB1A2_tctB162m_tphCm/pSB1C3_tctB162m_tphCm and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a. Screening the transformants using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of Ara_503m with pSB1A2_tctB162m_tphCm/pSB1C3_tctB162m_tphCm and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a. Screening the transformants using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
-
 
+
-
:[[File:W12_1_kolo_operon1.JPG|250px]]
+
-
:only colony 1, 2 and 3 have the right insert
+
:[[Image:W12_1_kolo_operon1.JPG|thumb|none|250px|Control of ligation (10 colonies tested). Only colony 1, 2 and 3 have the right insert. Marker: 1kb DNA ladder, NEB]]
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
* Miniprep (Fermentas Kit) and Nanodrop measurement of:
Line 645: Line 664:
* Analysis of mutagenic PCR products of 505_8_2 and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest restriction digest] with PstI
* Analysis of mutagenic PCR products of 505_8_2 and [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest restriction digest] with PstI
-
:[[File:W12_2_505m_restriktion.JPG|400px]]
+
*Restriction digest of tctA 505aa after mutagenic PCR. The gel was alternately loaded with digested and uncut PCR products. Restriction site hasn't been removed. Marker: 1kb DNA ladder, NEB
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of Ara_RBS with EcoRI and SpeI and of pSB1C3_505m with EcoRI and XbaI. Building pSB1C3_Ara_505m by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a.
+
:[[Image:W12_2_505m_restriktion.JPG|thumb|none|400px|Restriction digest of tctA 505aa after mutagenic PCR. The gel was alternately loaded with digested and uncut PCR products. Restriction site has successfully been removed. Marker: 1kb DNA ladder, NEB]]
 +
 
 +
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of Ara_RBS with EcoRI and SpeI and of pSB1C3_505m with EcoRI and XbaI. Building pSB1C3_Ara_505m by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a.
 +
 
 +
====Results====
 +
* Successful mutagenic PCR of gene 1 and transformation into DH5a
 +
* Ligation of Ara and gene 1 into pSB1C3 and transformation into DH5a
===week 13 (13.-17.08.12)===
===week 13 (13.-17.08.12)===
Line 655: Line 680:
* Checking the transformation of DH5a with pSB1C3_Ara_505m by using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
* Checking the transformation of DH5a with pSB1C3_Ara_505m by using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
-
:[[File:W13_1_505_mut_PCR_von_Basti.JPG|500px]]
+
:[[Image:W13_1_505_mut_PCR_von_Basti.JPG|thumb|none|500px|Colony-PCR of DH5a with pSB1C3_Ara_505m. All Colonies are positive. Marker: 1kb DNA ladder, NEB]]
* Sequencing pSB1C3_Ara_XylE, pSB1C3_Ara_tctA503m_tctB162m_tphCm (=Operon1), pSB1C3_505m
* Sequencing pSB1C3_Ara_XylE, pSB1C3_Ara_tctA503m_tctB162m_tphCm (=Operon1), pSB1C3_505m
-
*[https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of Ara_RBS with EcoRI and SpeI and of pSB1C3_tphCm with EcoRI and XbaI. Building pSB1C3_Ara_tphCm by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation] and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a
+
*[https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of Ara_RBS with EcoRI and SpeI and of pSB1C3_tphCm with EcoRI and XbaI. Building pSB1C3_Ara_tphCm by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation] and subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a
-
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_Ara_tctA505m with EcoRI and SpeI. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation Ligation] of Ara_tctA505m and tctB197_tphCm into pSB1C3
+
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_Ara_tctA505m with EcoRI and SpeI. [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ Ligation] of Ara_tctA505m and tctB197_tphCm into pSB1C3
 +
 
 +
====Results====
 +
* Checking the Transdormation of pSB1C3_Ara_505m
 +
* Sequencing pSB1C3_Ara_XylE, pSB1C3_Ara_tctA503m_tctB162m_tphCm (=Operon1), pSB1C3_505m
 +
* We created pSB1C3_Ara_tphCm by ligation
===week 14 (20.-24.08.12)===
===week 14 (20.-24.08.12)===
* Checking the transformation of DH5a with pSB1C3_Ara_tphCm using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
* Checking the transformation of DH5a with pSB1C3_Ara_tphCm using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
-
:[[File:W14_1_kolo.JPG|250px]]
 
-
===Week 15-19 charakterisation and uptake tests===
+
:[[Image:W14_1_kolo.JPG|thumb|none|300px|Colony-PCR of the transformation of DH5a with pSB1C3_Ara_tphCm. Colonies 1, 2, 3, 4, 5, 6, 9,10 and 11 are positive. Marker: 1kb DNA ladder, NEB]]
 +
 
 +
'''Result'''
 +
Ara_tphC was designed
 +
 
 +
===Week 15-19 charakterization and uptake tests===
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_Ara_tphCm and pSB1C3_Ara_tctA505m with PstI and SpeI
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_Ara_tphCm and pSB1C3_Ara_tctA505m with PstI and SpeI
Line 674: Line 708:
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_197_tphCm with XbaI and PstI.
* [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Restriction_digest Restriction digest] of pSB1C3_197_tphCm with XbaI and PstI.
-
* Building the construct pSB1C3_Ara_tctA505m_197_tphCm (= Operon2) by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/DNA_Ligation ligation]. Subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a
+
* Building the construct pSB1C3_Ara_tctA505m_197_tphCm (= Operon2) by [https://2012.igem.org/Team:TU_Darmstadt/Protocols/ ligation]. Subsequent [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Heat_Shock_Transformation transformation] into DH5a
* Checking the transformation of DH5a with Operon2 using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
* Checking the transformation of DH5a with Operon2 using [https://2012.igem.org/Team:TU_Darmstadt/Protocols/Colony_PCR colony-PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
-
:[[File:W15_1_operon2_Kolo.jpg|100px]]
+
:[[Image:W15_1_operon2_Kolo.jpg|thumb|none|100px|Colony-PCR of transformation of DH5a with Operon2. Marker: 1kb DNA ladder, NEB]]
*'''Overexpression of designed parts in ''E. coli C43 (DE3)'' to verificating the protein expression and isolation of membranes for SDS-PAGE'''
*'''Overexpression of designed parts in ''E. coli C43 (DE3)'' to verificating the protein expression and isolation of membranes for SDS-PAGE'''
 +
[[File:SDS0004.JPG|thumb|400px| '''Figure 1.''' SDS-PAGE of isolated membranes  after overexpression ''E Coli strain C43(DE3)'' carrying '''1.'''putative terephtalate Operon1,'''2.''' putative terephtalate Operon2,'''3.'''AraC-Pbad ,'''4.'''AraC-Pbad_tctA_503 and '''5.'''AraC-Pbad_322 plasmids. ''From left to right:''  '''3.'''(5µL),'''3.'''(10µL),'''4.'''(5µL),'''4.'''(10µL),Marker(Aplichem proteinmarker 3,'''2.'''(5µL),'''2.'''(10µL),'''5.'''(5µL),'''5.'''(10µL)/(xµL) membranes volume. The SDS PAGE was strained with Coomassie R-250]]
-
Three different overnight culture  of ''E Coli strain C43(DE3)'' carrying putative terephtalate Operon1 ( BBa_K808006 ), putative terephtalate Operon2 (BBa_K808007 ) and AraC-Pbad plasmids (BBa_K808000 )  was inoculated 1:100 into fresh 100 mL LB media. At the OD 600 of 0,8-1,0  0,02 % L-(+)-Arabinose (inducer) was added  to the cultures  and incubated  at room tempreture (RT)and shaking at 230 rpm for 6 hours. After the incubation the culltures were centrifuged at 10.00xg and washed 2 times in 5 mL phosphate buffer saline buffer (PBS) and resuspenden in 5 mL PBS. Phenylmethylsulfonyl fluoride (PMSF,1 mM final concentration) and DNAse II (100 U/mL final concentration) was added to the resuspenden cultures and the cells were broked down with french press at 10.000 psi for 2 times. To remove of  unbroked cell and debris a centrifugation at 12.000xg for 20 min followed. The supernatan was transfered into a ultrazentrifugation tubes and centrifugated at 100.000xg for 45 min to collect membranes. The pelletts were resuspended in 300 µL PBS and were used as a sample to perfomed a SDS-PAGE. (Fig.xxy)
 
 +
Three different overnight culture  of ''E Coli strain C43(DE3)'' carrying putative terephtalate Operon1  ), putative terephtalate Operon2 (BBa_K808007 ) and AraC-Pbad plasmids (BBa_K808000 ) was inoculated 1:100 into fresh 100 mL LB media. At the OD 600 of 0,8-1,0  0,02 % L-(+)-Arabinose (inducer) was added  to the cultures  and incubated  at room tempreture (RT)and shaking at 230 rpm for 6 hours. After the incubation the culltures were centrifuged at 10.00xg and washed 2 times in 5 mL phosphate buffer saline buffer (PBS) and resuspenden in 5 mL PBS. Phenylmethylsulfonyl fluoride (PMSF,1 mM final concentration) and DNAse II (100 U/mL final concentration) was added to the resuspenden cultures and the cells were broked down for 2 times with french press at 10.000 psi. To remove of  unbroked cell and debris a centrifugation at 12.000xg for 20 min followed. The supernatan was transfered into a ultrazentrifugation tubes and centrifugated at 100.000xg for 45 min to collect membranes. The pelletts were resuspended in 300 µL PBS and were used as a sample to perfomed a [http://openwetware.org/wiki/Keating:Experimental_Protocols:SDS-PAGE SDS-PAGE.] (Fig.1)
 +
 +
'''Result'''
 +
 +
Figure 1 showes no  significant protein band. It suggest, that the SDS as a detergent was a wrong choice or the expression of the membrane proteins was to low to detect it, but it´s well known that membrane proteins exhibit a low expression level and thus not able to detect with conventinal SDS-PAGE. For futher analyses we have to amplify the signal with a antibody staining (Conventional Western-Blot analysis).
-
HIER WIRD DAS BILD SEIN ;)
 
-
Fig.xxy. SDS-PAGE of  membrane fraction/membrane proteins after overexpression ''E Coli strain C43(DE3)'' carrying putative terephtalate Operon1 ( BBa_K808006 ), putative terephtalate Operon2 (BBa_K808007 ) AraC-Pbad plasmids (negative control) (Bba_K808000),  AraC-Pbad_tctA_503 and  AraC-Pbad_322 (link). From left to right: name der auftragung......
 
-
References zu dem Teil: Drew, D., M. Lerch, et al. (2006). "Optimization of membrane protein overexpression and purification using GFP fusions." Nat Methods 3(4): 303-313.
 
Line 708: Line 744:
# '''Gas chromatography–mass spectrometry (GC-MS)'''
# '''Gas chromatography–mass spectrometry (GC-MS)'''
# '''Energy dispersive X-ray spectroscopy (EDX)'''
# '''Energy dispersive X-ray spectroscopy (EDX)'''
-
 
*'''1. Photometric  measurement of TPA uptake in different  media at 240 nm'''
*'''1. Photometric  measurement of TPA uptake in different  media at 240 nm'''
-
Our first strategy to check our designed uptake system (operon 1 and operon 2 links) was to checked  the absorbation at 240 nm. For that reason we developed a TPA standard curve in different media. (link zu dem protokollen).
+
Our first strategy to check our designed uptake system operon 1 and operon 2 was to checked  the absorbation at 240 nm. For that reason we developed a TPA standard curve in different media. [[File:Tpa.png|thumb|300px| '''Figure.1'''In order to verify the uptake of TPA  into bacteria, we studied the influence of TPA on a solution‘s absorbance of light. A decrease in the concentration of TPA by time should result in lowering optical density at its wavelength of extinction.
 +
Scanning the spectrum of TPA (80 µM in H2O) with an OD measuring device led to a single peak at a wavelength of approximately 240 nm. Therefore a serial dilution of TPA in H2O was inspected photometrically, ranging in concentration from 400 µM to 50 nM. The measurement‘s results are described by the graphs below. The chart shows a quite accurate linear correlation between TPA-concentration and optical density (series 1; linear section is highlighted in blue color). Note that the curve progression differs more and more from proportionality for concentrations above about 250 µM TPA (red colored section of series 1). We assume the lack of precision of our measuring device when dealing with OD values higher than about 2.5 to be the reason for this stagnation.]]
-
An overnight cultures of '''E. Colis DH5apha'' carrying putative terephtalate Operon1 ( BBa_K808006 ), putative terephtalate Operon2 (BBa_K808007 )were inoculated 1:100 in a freshly 10 mL M9 minimal medium cultivated shaking at 230 rpm at 30°C. At the OD600 of 0.5 0.001 % L-(+)-Arabinose(inducer) and 100 µM TPA was added and incubated for 6 hours at 30 °C and shaked at shaking 230 rpm. Every hour 500 µL of the cultures was transfered into a 1.5 mL Eppendorf cup and centrifuged at 17xg to spin down the cells for 5 min. Afterwards the TPA concentration was measured at 240 nm.  
+
In the following series differences between solutions of TPA in H2O and other fluids had to be found where upon M9-medium was of main interest, since this was planned to be used as medium for production of the eventually used modified E. coli. The results are represented in series 2 (green graph). The tight gap between the two curves led us to the decision that their differences was of no significance for our further measurements.
 +
An overnight cultures of '''E. Colis DH5apha'' carrying putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808006 Operon1], putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808007 Operon2] were inoculated 1:100 in a freshly 10 mL M9 minimal medium cultivated shaking at 230 rpm at 30°C. At the OD600 of 0.5 0.001 % L-(+)-Arabinose(inducer) and 100 µM TPA was added and incubated for 6 hours at 30 °C and shaked at shaking 230 rpm. Every hour 500 µL of the cultures was transfered into a 1.5 mL Eppendorf cup and centrifuged at 17xg to spin down the cells for 5 min. Afterwards the TPA concentration was measured at 240 nm.  
 +
 
 +
 
 +
'''Result'''
This strategy did not work. The M9 minimal medium had an absorbation at 240 nm after ''E. colis''  were incubated until the OD600 of 0.5. Our assumption is that lyseted ''E. colis DH5alpha'' are responsible for the absorbation or  ''E. colis'' secreteting moleculs into the medium, which are absorbats at 240 nm.  
This strategy did not work. The M9 minimal medium had an absorbation at 240 nm after ''E. colis''  were incubated until the OD600 of 0.5. Our assumption is that lyseted ''E. colis DH5alpha'' are responsible for the absorbation or  ''E. colis'' secreteting moleculs into the medium, which are absorbats at 240 nm.  
-
*'''2. Preparation of ''E. coli'' strain C43(DE3) carrying the putative terephtalate Operon1 ( BBa_K808006 ), putative terephtalate Operon2 (BBa_K808007 ) and AraC-Pbad plasmids (BBa_K808000 ) for the Gas chromatography–mass spectrometry (GC-MS)'''
+
*'''2. Preparation of ''E. coli'' strain C43(DE3) carrying the putative terephtalate Operon1, putative terephtalate Operon2 and AraC-Pbad plasmids for the Gas chromatography–mass spectrometry (GC-MS)'''
-
Three different overnight culture  of ''E. colis C43(DE3)''' carrying putative terephtalate Operon1 ( BBa_K808006 ), putative terephtalate Operon2 (BBa_K808007 ) and AraC-Pbad plasmids (BBa_K808000 ) were inoculated 1:100 into fresh 100 mL LB medium. 0,001% L-(+)-Arabinose (inducer) was added at the optical density  (OD600) of 1.3-1.4 and incubated at 30°C for 2 hour, shaked at 230 rpm. Afterwards  2 mL of each cultures were transferred to a  new 2 mL Epppendorf cup with each 50,-100,-150, -200,-250,-300,- µM TPA and incubated on a heating-block at 30 °C, shaked at 1000 rpm for 5 hours. After the incubation the cultures were centrifuged at 17.000xg for 15 min. The culture with 100 µM TPA cultures were chosed for GC-MC measurment.The supernatan was transferred into a new Eppi and the protocol [https://2012.igem.org/Team:TU_Darmstadt/Protocols/GC-MS sample preparation for GC-MS ] was accomplished.
+
Three different overnight culture  of ''E. colis C43(DE3)'' carrying putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808006 Operon1],putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808007 Operon2] and AraC-Pbad plasmids were inoculated 1:100 into fresh 100 mL LB medium. 0,001% L-(+)-Arabinose (inducer) was added at the optical density  (OD600) of 1.3-1.4 and incubated at 30°C for 2 hour, shaked at 230 rpm. Afterwards  2 mL of each cultures were transferred to a  new 2 mL Epppendorf cup with each 50,-100,-150, -200,-250,-300,- µM TPA and incubated on a heating-block at 30 °C, shaked at 1000 rpm for 5 hours. After the incubation the cultures were centrifuged at 17.000xg for 15 min. The culture with 100 µM TPA cultures were chosed for GC-MC measurment.The supernatan was transferred into a new Eppendorf cup and the protocol [https://2012.igem.org/Team:TU_Darmstadt/Protocols/GC-MS sample preparation for GC-MS ] was accomplished.
 +
 
 +
'''Result'''
 +
 
 +
We successfully showed that we are able to qualify and thus quantify TPA-di-methyl-ester via GC-MS. Furthermore, we quantified the operon 1 and operon 2 sample of the transport group. Summarising, we obtained the following peak-areas:
 +
operon-1: 43113
 +
operon-2: 38700
 +
control : 32729
 +
Interestingly, we measured a lower concentration of TPA in our control sample. The reason for this might be that the OD of our control sample was higher (0.85) than the OD of our biological samples. Notably, that our untransformed bacteria is able to take TPA up into the periplasma. Nonetheless, due to the the analysis, we measured significant differences in our peak areas. The delta of 4413 digits of Operon-1 to Operon-2 is may be result of a working TPA transport system. For further work we have to measure more samples (biger statistic), measure a control which contains only TPA in the cycl.hexan matrix and using constant ODs by the sample preparations. Moreover, the results have to be compared to HPLC-MS measurements. Unfortunately, the wiki freeze is today, so we are not able to measure again (this time.
 +
 
 +
 
 +
For more details: https://2012.igem.org/Team:TU_Darmstadt/Protocols/GC-MS/Results
*'''3. Preparation of ''E. colis C43(DE3)'' for the energy dispersive X-ray spectroscopy (EDX)'''
*'''3. Preparation of ''E. colis C43(DE3)'' for the energy dispersive X-ray spectroscopy (EDX)'''
 +
[[File:Smiling.Ecoli.PNG|300px|thumb| '''Figure 2.''' An electron microscope picture of embedded ''E. colis C43(DE3)'' carrying putative terephtalate Operon1]]
 +
 +
Three different overnight culture  of ''E. colis C43(DE3)''' carrying putative terephtalate  [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808006 Operon1], putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808007 Operon2] and AraC-Pbad plasmids  was inoculated 1:100 into fresh 100 mL LB media. At the OD 600 of 0.8 - 1.0  0.02 % L-(+)-Arabinose (inducer) was added  to the cultures  and incubated at room tempreture (RT) for 5 hours, shaking at 230 rpm. After the incubation the cultures were cenrifuged 15 min at 10.00xg and the pelletes were prepared for the energy dispersive X-ray spectroscopy (EDX). The cells had to be fixed, embedded in a SPURR-embedding medium (resin) and cut in to small rectangles smaller than 100 nm. For more details: [https://2012.igem.org/Team:TU_Darmstadt/Protocols/SamplePreparationEDX EDX Preparation of Escherichia Coli for the energy dispersive X-ray spectroscopy (EDX)] The  embedded ''E. Colis'' was checked under an electron microscope
 +
 +
 +
'''Result'''
-
Three different overnight culture  of ''E. colis C43(DE3)''' carrying putative terephtalate Operon1 ( BBa_K808006 ), putative terephtalate Operon2 (BBa_K808007 ) and AraC-Pbad plasmids (BBa_K808000 ) was inoculated 1:100 into fresh 100 mL LB media. At the OD 600 of 0.8 - 1.0  0.02 % L-(+)-Arabinose (inducer) was added  to the cultures  and incubated at room tempreture (RT) for 5 hours, shaking at 230 rpm. After the incubation the cultures were cenrifuged 15 min at 10.00xg and the pelletes were prepared for the energy dispersive X-ray spectroscopy (EDX). The cells had to be fixed, embedded in a SPURR-embedding medium (resin) and cut in to small rectangles smaller than 100 nm. For more details: [https://2012.igem.org/Team:TU_Darmstadt/Protocols/SamplePreparationEDX EDX Preparation of Escherichia Coli for the energy dispersive X-ray spectroscopy (EDX)] The  embedded ''E. Colis'' was checked under an electron microscope
+
The spectra show a clear difference between background and sample measurement. In the background spectra no nitrogen (N) and phosphor (P) occurs. These elements are perfect markers for biological material. Although there is nor clear evidence for the uptake of TPA into the cells. The TAM-EDX experimental set up is a good method to achieve this goal. Unfortunately time is short in the iGEM competition, otherwise we would add a heavy atom like bromide or chloride to TPA. As seen in the spectra non of this elements occur in our sample, which would make it possible to clearly identify the source of a Br/Cl peak as TPA.  
-
[[File:Smiling.Ecoli.PNG|400px|thumb| Figure xy. An electron microscope picture of embedded ''E. colis C43(DE3)'' carrying putative terephtalate Operon1]]
+
For more details: [https://2012.igem.org/Team:TU_Darmstadt/Protocols/TEM-EDX TEM-EDX measurment]

Latest revision as of 02:14, 27 September 2012

Transport

Contents

Overview

This lab journal describes an isolation and characterisation of the putative terephtalate (TPA) uptake system from [http://www.dsmz.de/catalogues/details/culture/DSM-14576.html?tx_dsmzresources_pi5%5BreturnPid%5D=304Comamonas testosteroni KF-1] (C. testosteroni) in Escherichia Coli (E.Coli). The putative terephtalate system consist of three different domain, two alpha-helical transmembrane protein (11-12 and 4-5 alpha-helical transmembrane protein) and one periplasmic terephtalate binding protein. The strain was purchased from [http://www.dsmz.de/ DMSZ]-German Collection of Microorganism and Cell Cultures (DSMZ no.14576). We designed two putative TPA uptake operons and the intake of TPA was checked by photometry, gas chromatography-mass spectrometry (GC-MS) and energy dispersive X-ray spectroscopy (EDX).


How we constructed our Biobricks
Overview of Biobrick construction

Week 1 (21.-25.05.12)

  • First colony PCR of Comamonas testosteroni for isolation of the following genes: [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tctB 197aa] (2), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808002 tctA_503aa] (3), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tctB 162aa] (4), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5). (Primers: tctA_503 Biobrick, tctA_505 Biobrick, tctB_162 Biobrick, tctB_197 Biobrick, tphC Biobrick). Analysis of [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] products by Agarose gel electrophoresis
A
successful isolation of the five genes form C. testosteroni. Marker: 1kb DNA ladder, NEB
  • PCR product purification using the Promega-Kit
  • Nanodrop measurements of the purified PCR products:
(1) : 19.5 ng/µl 260/280=1.58
(2) : 61.9 ng/µl 260/280=1.75
(3) : 75.1 ng/µl 260/280=1.75
(4) : 93.3 ng/µl 260/280=1.85
(5) : 91.3 ng/µl 260/280=1.58
w1_2_restriktionsverdau_s8.png
  • Purification of the bands gained form gel electrophoresis (Promega-Kit)
  • Nanodrop measurements of the purified products:
(1) : 8.3 ng/µl 260/280=1.94
(2) : 8.9 ng/µl 260/280=1.80
(3) : 13.0 ng/µl 260/280=1.57
(4) : 1.5 ng/µl 260/280=3.08
(5) : 3.7 ng/µl 260/280=2.26

Results

  • We got the purified Genes from C. testosteroni but the yield after purification is to low for futher use

week 2 (28.05.-01.06.12)

  • Purified products from 1. week were ligated into pSB1A2 and subsequently transformed into DH5a (in spite of low concentration)
  • Overnight incubation on LB agar plates; no growth detectable
  • PCR product purification using the Promega-Kit: ([http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tctB 197aa] (2), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808002 tctA_503aa] (3), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tctB 162aa] (4), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5))
A
(1): no PCR-product. Marker: 1kb DNA ladder, NEB
  • Nanodrop measurements of the purified PCR products:
(2) : 56.1 ng/µl 260/280=1.87
(3) : 66.8 ng/µl 260/280=1.92
(4) : 72.8 ng/µl 260/280=1.87
(5) : 68.8 ng/µl 260/280=1.82

Results

  • Finally we got the genes 2, 3, 4 and 5 in acceptable concentrations

week 3 (04.-08.06.12)

  • Restriction digest of the purified PCR products and of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (leftover of the 1. week) by SpeI and EcoRI
  • Dephosphorylation of the restriction reactions by using antarctic Phosphatase
  • colony-PCR of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), 2 approaches (Primers:tctA_505 Biobrick)
  • Analysis of PCR products by Agarose gel electrophoresis. Only one of them showed the expected band. The band was excluded and purified via the Promega-Kit.
only (1.1) showed the expected band. Marker: 1kb DNA ladder, NEB
  • Nanodrop measurement of the purified product:
(1.1) : 8.9 ng/µl 260/280= 2,22
Because of low concentration and contamination the PCR was repeated and the product was purified again by the Promega-Kit.
PCR did not work
  • Testing the homemade Taq-Polymerase for function. The Phu-Polymerase was used for comparison. Only the approach using the Phu-Polymerase showed the expected bands in Agarose gel electrophoresis.
only the Phu-approach showed the expected bands. Marker: 1kb DNA ladder, NEB
  • Screening was repeated with Phu-Polymerase; no bands visible

Results

  • We ligated the purified and restricted genes into pSB1A2 and transformed it into DH5a but the colony-PCR didn't work.
  • We tried to isolate gene 1 again but after purification the concentration was too low

week 4 (11.-15-06.12)

  • Inoculation of LB-media with DH5a_pSB1A2 and DH5a_pSB1C3; overnight incubation at 37°C
  • Miniprep of DH5a_pSB1A2 and DH5a_pSB1C3 using the Promega-Kit
  • Nanodrop measurements of the preparation:
pSB1A2 : 136.1 ng/µl 260/280= 1.93
pSB1C3 : 265.1 ng/µl 260/280= 1.89
  • Restriction digest of pSB1A2 and pSB1C3 with EcoRI and SpeI. Afterwards dephosphorylation by using Antarctic phosphatase.
Analysis of the restricted an unrestricted plasmids pSB1A2 and pSB1C3. Marker: 1kb DNA ladder, NEB
pSB1C3 shows several bands (Insert, vector without insert, linearized vector with insert); concentration of pSB1A2 is very low, only one band visible
  • Approach to isolate the following genes from Comamonas t. by colony-PCR: [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tctB 197aa] (2), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808002 tctA_503aa] (3), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tctB 162aa] (4) and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: tctA_503 Biobrick, tctA_505 Biobrick, tctB_162 Biobrick, tctB_197 Biobrick, tphC Biobrick)
Isolation form the Genes 2, 3 and 4. The Isolation of 1 and 5 didn't work (not shown). Marker: 1kb DNA ladder, NEB
  • PCR product purification by using the Promega-Kit
  • Nanodrop measurements of the purified PCR products:
(2) : 18.3 ng/µl 260/280=2.03
(3) : 21.2 ng/µl 260/280=1.95
(4) : 23.9 ng/µl 260/280=2.05
  • Ligation of the digested genes ((2), (3), (4)) into pSB1A2 and pSB1C3
  • Transformation of DH5a with pSB1A2_197, pSB1A2_503, pSB1A2_162, pSB1C3_197, pSB1C3_503, pSB1C3_162 (6 different transformation approaches). Overnight incubation at 37°C
colony-PCR-screen part I. Only the positive colonies are marked. Marker: Lambda DNA/Eco471 Maker
colony-PCR-screen part II. Only the positive colonies are marked. Marker: Lambda DNA/Eco471 Maker
  • Colony-PCR of Comamonas t. to isolate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1) und [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) (Primers: tctA_505 Biobrick, tphC Biobrick)
Colony-PCR products of gene 1 and 5. [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] shows only the band of the undesired smaller product. Product of the ligation of 2,3 and 4 into pSB1A2 and pSC1C3
  • Restriction digest of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) and subsequent Ligation into pSB1A2 and pSB1C3
  • Transformation of DH5a with pSB1A2_322 und pSB1C3_322. [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: tphC Biobrick) used to check for successful transformation
  • Isolation of C. testosteroni genome, because it seems impossible to amplificate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1) from a fluid Comamonas t. culture.

Results

  • We started an other approach to isolate the five genes. All but gene 1 worked, so we isolated the C. testosteroni genome
  • We purified, restricted and ligated the genes 2-5 into pSB1A2 and pSB1C3 and transformed them into DH5a
  • We checked the genes 2, 3 and 4 by colony-PCR. All genes had positive transformants.

week 5 (18.-22.06.12)

  • Introduction of a nomenclature: A/C gene/colony: pSB1A2 = A; pSB1C3 = C; gene: tctA 505aa = 1, tctB 197aa = 2, tctA 503aa = 3, tctB 162aa = 4, tphC 322aa = 5; colony = 1...X
  • Producing fluid cultures of the positive transformants
  • Miniprep of the fluid culures by using the Frementas-Kit. Afterwards Nanodrop measurements of the preparations
A
Miniprep of the fluid cultures. Marker: Lambda DNA/Eco471 Maker
A2.3 : 125.9 ng/µl 260/280= 1.62
A3.1 : 103.3 ng/µl 260/280= 1.72
A4.6 : 147.2 ng/µl 260/280= 1.70
A4.5 : 108.7 ng/µl 260/280= 1.86
A5.12 : 88.0 ng/µl 260/280= 1.87
A5.8 : 85.01 ng/µl 260/280= 1.78
A3.2 : 87.3 ng/µl 260/280= 1.81
C4.6 : 70.5 ng/µl 260/280= 1.81
C4.1 : 41.2 ng/µl 260/280= 1.85
C4.4 : 104.2 ng/µl 260/280= 1.85
C2.1 : 132.2 ng/µl 260/280= 1.85
C2.6 : 188.1 ng/µl 260/280= 1.75
  • [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] using a rest of purified [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1) (Primers: tctA_505 Biobrick), subsequent Agarose gel electrophoresis
Colony-PCR screen. Only the positive colonies are marked. 3 positive transformants were picked for inoculation of fluid media (A34, A43; C513). Marker: Lambda DNA/Eco471 Maker
  • Miniprep (Fermentas Kit) of the fluid culures and Nanodrop measurements:
A2.4 : 202,1 ng/µl 260/280= 1,63
A2.5 : 126,5 ng/µl 260/280= 1,90
A2.6 : 107,5 ng/µl 260/280= 1,81
A4.2 : 133,8 ng/µl 260/280= 1,59
C2.3 : 187,8 ng/µl 260/280= 1,87
C2.4 : 270,7 ng/µl 260/280= 1,80
C4.1 : 103,8 ng/µl 260/280= 1,80
  • The Miniprep products were digested by restriction enzymes, each was cut once with EcoRI and twice with EcoRI/SpeI. Analisys of the digested products by Agarose gel electrophoresis
Restriction digest of miniprep. Marker: Lambda DNA/Eco471 Maker

Results

  • We ligated our genes 2, 3 and 4 successfully either in pSB1A2 or pSB1C3
  • We couldn't get a positive colony-PCR of a transformant containing gene 5
  • Isolation of gene 1 still didn't work

week 6 (25.-29.06.12)

  • Further colony-PCR of C.testosteroni. (3 approaches) and [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] with genomic C. testosteroni. DNA as template to obtain [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1), 2 approaches each (Primers: tctA_505 Biobrick). Subsequent analisys of the PCR products by Agarose gel electrophoresis. All PCRs of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] show only the band of the undesired smaller product.
  • Colony-PCR of C. testosteroni. and [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] with genomic DNA of C. testosteroni. as template to obtain [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] (1). [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tctB 197aa] (2), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808002 tctA_503aa] (3), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tctB 162aa] (4), [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808001 tphC 322aa] (5) used as control (Primers: tctA_503 Biobrick, tctA_505 Biobrick, tctB_162 Biobrick, tctB_197 Biobrick, tphC Biobrick)
Finally a colony-PCR of C. testosteroni showed a second band on agarose gel electrophoresis. Marker: Lambda DNA/Eco471 Maker
The upper bands were cut and purified by Promega kit. Restriction digest using SpeI and EcoRI.
  • Miniprep and Nanodrop measurement of:
A3.1 : 111.6 ng/µl 260/280= 1.72
A3.4 : 79.5 ng/µl 260/280= 1.66
C4.6 : 69.6 ng/µl 260/280= 1.76
A4.2 : 96.9 ng/µl 260/280= 1.62
A2.4 : 109.7 ng/µl 260/280= 1.72
A2.5 : 160.8 ng/µl 260/280= 1.79
A5.13 : 188.7 ng/µl 260/280= 1.85
A5.12 : 114.5 ng/µl 260/280= 1.81
All PCRs of miniprep showed a product. Marker: 1kb DNA ladder, NEB
No bands visible
  • Ligation of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808004 tctA 505aa] into pSB1C3 and subsequently transformation into DH5a. No colonies
  • The following vectors were sequenced: pSB1A2_197.4, pSB1A2_197.5, psSB1A2_503.1, pSB1A2_503.4, pSB1A2_162.2, pSB1C3_162.6, pSB1A2_322.12, pSB1A2_322.13
  • As A5.12 and A5.13 are missing the right insert the colony-PCR was repeated (5 and 6 colonies were used, Primers: tphC Biobrick). To provide additional monitoring the colony-PCR was repeated for A2.5_2, A3.1_2 und A4.2_2. 2 positive colonies were again streaked onto fresh media.
  • The Arabinose-Promotor ([http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara]) was isolated from pbad_turbo_gfp and colonies containing this plasmid (3 approaches each).
Isolation of Ara. Approach T2 is further in use. Marker: 1kb DNA ladder, NEB

Results

  • Finally we made it to isolate gene 1 form a colony of C. testosteroni, but transformation didn't work
  • Miniprep of the other genes, and sequencing
  • Isolation of Ara

week 7 (02.-06.07.12)

  • Restriction digest of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] and pXylE using EcoRI and SpeI. Ligation of the restricted products and transformation into DH5a. No colonies
Restriction digest of Ara. Marker: 1kb DNA ladder, NEB
  • DH5a-cells containing the vectors A4.2_2, A3.1_2, A2.5_2, A5.13_5 were diluted in glycerol (20%) and freezed (-80°C).
Restriction digest of the genes after mutagenic PCR. The gel was alternately loaded with digested unmutated and digested mutated PCR products. Marker: 1kb DNA ladder, NEB
  • The transformation of DH5a with pSB1C3_tctA_505aa was verified by colony-PCR (Primers: tctA_505 Biobrick). The positive colonies were used for Miniprep
  • Miniprep (Fermentas Kit) and Nanodrop measurement:
A5.13m_1 : 105.2 ng/µl 260/280= 1.84
A5.13m_2 : 223.0 ng/µl 260/280= 1.87
A5.13m_3 : 110.6 ng/µl 260/280= 1.87
A5.13m_4 : 99.6 ng/µl 260/280= 1.90
A5.13m_6 : 326.6 ng/µl 260/280= 1.88
A5.13m_7 : 145.0 ng/µl 260/280= 1.84
A3.1m_1 : 241.7 ng/µl 260/280= 1.87
A3.1m_2 : 188.4 ng/µl 260/280= 1.89
A3.1m_3 : 112.4 ng/µl 260/280= 1.89
A3.1m_4 : 173.1 ng/µl 260/280= 1.85
A3.1m_5 : 111.6 ng/µl 260/280= 1.85
A3.1m_6 : 138.1 ng/µl 260/280= 1.87
A3.1m_7 : 178.9 ng/µl 260/280= 1.86
A4.2m_1 : 57.0 ng/µl 260/280= 1.84
A4.2m_2 : 46.5 ng/µl 260/280= 1.77
A4.2m_3 : 55.7 ng/µl 260/280= 1.88
A4.2m_4 : 111.3 ng/µl 260/280= 1.82
A4.2m_5 : 236.9 ng/µl 260/280= 1.89
A4.2m_6 : 69.3 ng/µl 260/280= 1.89
A4.2m_7 : 72.3 ng/µl 260/280= 1.85
C1.2 : 132.9 ng/µl 260/280= 1.72

Results

  • First transformation of Ara into DH5a didn't work
  • Successfull mutagenic PCR of genes 3, 4 and 5 (gene 2 didn't has a PstI Restriction site)
  • Successfull transformation of DH5a with tctA 505aa
  • Second transformation of DH5a with pXylE_Ara

week 8 (09.-13.07.12)

  • Checking the transformation of DH5a with pSB1C3_tctA_505aa again using colony-PCR (Primers: tctA_505 Biobrick) (data not shown). The colonies Nr. 2, 8 and 10 were picked and streaked onto fresh media.
  • colony-PCR of DH5a_pXylE_Ara (Primers: Ara_RBS, no positve colonies, data not shown)
  • Sequencing the following vectors: pSB1A2_4.2m_5, pSB1A2_4.2m_4, pSB1A2_5.13m_3, pSB1A2_5.13m_2, pSB1A2_3.1m_1, pSB1A2_3.1m_5, pSB1A2_3.1m_7
  • Checking the transformation of DH5a with A1 (5 colonies) and C1 (7 colonies) using colony-PCR (Primers: tctA_505 Biobrick, data not shown)
  • Checking the transformation of DH5a with pSB1C3_tctA_505aa again by colony-PCR (Primers: tctA_505 Biobrick). Only the colonies Nr. 2, 8 and 10 (see above) were checked (2 colonies each).
Colony-PCR of colonies 2,8 and 10 from transformation with tctA 505aa. Marker: 1kb DNA ladder, NEB
  • Another colony-PCR of DH5a_pXy19_Ara (Primers: Ara_RBS). The positive colonies were used for fluid culture (data not shown).
  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
A5.13m_2 : 191.2 ng/µl 260/280= 1.84
A5.13m_3 : 168.1 ng/µl 260/280= 1.78
A2.5 : 193.0 ng/µl 260/280= 1.83
A3.1m_5 : 146.1 ng/µl 260/280= 1.82
A3.1m_1 : 250.1 ng/µl 260/280= 1.84
A4.2m_4 : 124.8 ng/µl 260/280= 1.85
  • Restriction digest of A5.13m_2, A5.13m_3, A3.1m_1, A3.1m_5, A2.5, A4.2m_4 with EcoRI and SpeI. The restriction was done to enable the ligation of the mutated genes into pSB1C3. Afterwards DH5a was transformed with the ligation product.
  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
C505_2_2 : 253.6 ng/µl 260/280= 1.60
C505_2_3 : 274.7 ng/µl 260/280= 1.88
C505_8_2 : 462.1 ng/µl 260/280= 1.38
C505_8_3 : 149.1 ng/µl 260/280= 1.84
C505_10_3 : 160.4 ng/µl 260/280= 1.98
Restriction of miniprep. Gel loading: uncut, cut once, cut twice. C505_2_3 und C505_8_2 were selected for mutagenic PCR. Marker: 1kb DNA ladder, NEB
  • Restriction digest of pXylE with EcoRI and XbaI and of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] with EcoRI and SpeI. Dephosphorylation of pXylE. Ligation of pXylE and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara]

Results

  • Miniprep of the DH5a-Colonies with the mutated genes and restriction analysis
  • Sequencing of the mutated genes
  • Amplification and restriction of gene 2, 3, 4 and 5 for Ligation into pSB1C3
  • Successfull isolation of Ara, Ligation with XylE

week 9 (16.-20.07.12)

  • [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808003 tct_B162m] and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808005 tct_B197m] with primer to add a RBS in front and behind the gene (Primers: tctB_162_RBS, tctB_197_RBS)
  • Adding a RBS to one site of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] using [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: Ara_RBS)
  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
C3.1m_1 : 278.9 ng/µl 260/280= 1.88
C4.2m_4 : 214.2 ng/µl 260/280= 1.86
5.13m_3 : 256.3 ng/µl 260/280= 1.88
C2.5_2 : 44.8 ng/µl 260/280= 2.00
C5.13m_2 : 60.8 ng/µl 260/280= 1.89

Results

  • We added successfully a RBS in front and behind gene 2 and 4
  • We added successfully a RBS on Ara
  • First mutagenic PCR on gene 1 didn't work

week 10 (23.-27.07.12)

  • Restriction digest of pSB1C3_5.13m_3_2 and pSB1C3_5.13m_3_3 with EcoRI and XbaI. Afterwards the products are ligated with RBS_tctB162m_RBS and RBS_tctB197_RBS each.
  • [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] of Ara_RBS and [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] for ligation into pXylE and pSB1C3 (Primers: Ara_RBS). Afterwards restriction digest with restriction enzymes: Ara_RBS is cut with with EcoRI and SpeI and Ara is cut with EcoRI and XbaI
  • Ligation of the restricted PCR-products to: pSB1A2_tctB197_tphCm, pSB1C3_tctB162m_tphCm, pSB1C3_tct197_tphCm, pSB1A2_tctB162m_tphCm, pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_Ara_XylE and transformation into DH5a

Results

  • Ligation of gene RBS_2_RBS and RBS_4_RBS with gene 5 and transformation into DH5a
  • Ligation of gene 3 with Ara_RBS and transformation into DH5a
  • Mutagenic PCR of gene 1

week 11 (30.07.-03.08.12)

  • Checking transformation of DH5a by colony-PCR: pSB1A2_tctB197_tphCm, pSB1C3_tctB162m_tphCm, pSB1C3_tct197_tphCm, pSB1A2_tctB162m_tphCm, pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_Ara_XylE (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR]). Positive colonies are picked and used for inoculation of fluid media.
  • Miniprep (Fermentas Kit) of fluid culture and Nanodrop measurement of:
pSB1C3_503 : 110.0 ng/µl 260/280= 1.82
pSB1A2_tctB197_tphCm : 32.0 ng/µl 260/280= 2.10
pSB1A2_Ara_tctA503m : 202.0 ng/µl 260/280= 1.78
pSB1A2_tctB162m_tphCm : 36.5 ng/µl 260/280= 1.91
pSB1C3_Ara_tctA503m : 133.2 ng/µl 260/280= 1.83
pSB1C3_tctB162m_tphCm : 35.2 ng/µl 260/280= 1.93
pSB1C3_tct197_tphC : 30.6 ng/µl 260/280= 1.88
  • Restriction digest of pSB1A2_Ara_tctA503m, pSB1C3_Ara_tctA503m, pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm and building the final constructs by ligation: pSB1A2_tctA503m_tctB162m_tphCm und pSB1C3_tctA503m_tctB162m_tphCm. Transformation of the final constructs into DH5a.
  • Checking the mutagenic PCR product of 505_8_2 and the transformation of DH5a with pSB1C3_503 by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: tctA_505 Biobrick, tctA_503 Biobrick)
  • Restriction digest of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] und C4.2_4_1 using EcoRI and PstI, building pSB1C3_Ara by ligation and transformation of the vector into DH5a
  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
pSB1C3_Ara : 86.7 ng/µl 260/280= 1.83
pSB1C3_505m : 113.8 ng/µl 260/280= 1.85
  • Restriction digest of pSB1C3_505m with PstI. Checking if the restriction site has been successfully removed
Restriction digest of tctA 505aa after mutagenic PCR. The gel was alternately loaded with digested and uncut PCR products. Restriction site hasn't been removed. Marker: 1kb DNA ladder, NEB
  • Screening for transformation of DH5a with pSB1A2_tctA503m_tctB162m_tphCm and pSB1C3_tctA503m_tctB162m_tphCm using colony-PCR (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
  • Checking the constructs pSB1A2/pSB1C3_Ara_503m and pSB1A2/pSB1C3_tctB162m_tphCm by [http://en.wikipedia.org/wiki/Polymerase_chain_reaction PCR] (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
  • Ligation of [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808000 Ara] into pSB1C3
  • Checking if pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm have the right Prefix/Suffix by digesting both with EcoRI and XbaI and with EcoRI and PstI [*]
  • Ligation of pSB1A2_tctB162m_tphCm and pSB1C3_tctB162m_tphCm with Ara_503
  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
pSB1A2_tctB162m_tphCm_1 : 45.3 ng/µl 260/280= 1.90
pSB1A2_tctB162m_tphCm_2 : 74.5 ng/µl 260/280= 1.82
pSB1C3_tctB162m_tphCm_1 : 95.8 ng/µl 260/280= 1.86
pSB1C3_tctB162m_tphCm_2 : 85.7 ng/µl 260/280= 1.81
pSB1C3_tctB162m_tphCm_3 : 100.1 ng/µl 260/280= 1.84
pSB1C3_tctB162m_tphCm_4 : 79.9 ng/µl 260/280= 1.88
pSB1C3_tctB162m_tphCm_5 : 89.8 ng/µl 260/280= 1.85
  • Sequencing pSB1A2_tctB162m_tphCm_2 and pSB1C3_tctB162m_tphCm_5

Results

  • Restriction of the construct build in week 10 and ligation to the final construct Operon 1. Transformation into DH5a
  • We checked the mutagenic PCR of gene 1. The restriction site wasn't removed
  • Ligation of gene 3 into pSB1C3
  • Ligation of Ara into pSB1C3
  • Sequencing pSB1A2_tctB162m_tphCm_2 and pSB1C3_tctB162m_tphCm_5

week 12 (06.-10.08.12)

  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
pSB1A2_tctB162m_tphCm_2 : 55.7 ng/µl 260/280= 1.81
pSB1C3_tctB162m_tphCm_5 : 101.2 ng/µl 260/280= 1.92
  • Ligation of Ara_503m with pSB1A2_tctB162m_tphCm/pSB1C3_tctB162m_tphCm and subsequent transformation into DH5a. Screening the transformants using colony-PCR (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
Control of ligation (10 colonies tested). Only colony 1, 2 and 3 have the right insert. Marker: 1kb DNA ladder, NEB
  • Miniprep (Fermentas Kit) and Nanodrop measurement of:
pSB1A2_Ara_tctA503m : 278.0 ng/µl 260/280= 1.86
pSB1C3_Ara_tctA503m : 169.0 ng/µl 260/280= 1.87
pSB1C3_Ara_1 : 59.0 ng/µl 260/280= 1.90
pSB1C3_Ara_4 : 55.5 ng/µl 260/280= 1.80
pSB1C3_Ara_tctA503m_tctB162m_tphCm : 188.8 ng/µl 260/280= 1.86
pSB1C3_Ara_tctA503m_tctB162m_tphCm :168.8 ng/µl 260/280= 1.84
pSB1C3_Ara_tctA503m_tctB162m_tphCm :271.3 ng/µl 260/280= 1.85
pSB1C3_Ara_XylE : 149.8 ng/µl 260/280= 1.86
pSB1C3_tctB197_tphC : 95.8 ng/µl 260/280= 1.84
pSB1A2_tctB197_tphC : 69.0 ng/µl 260/280= 1.88
  • Sequencing of 3 different pSB1C3_Ara_tctA503m_tctB162m_tphC
  • Restriction digest of tctA 505aa after mutagenic PCR. The gel was alternately loaded with digested and uncut PCR products. Restriction site hasn't been removed. Marker: 1kb DNA ladder, NEB
Restriction digest of tctA 505aa after mutagenic PCR. The gel was alternately loaded with digested and uncut PCR products. Restriction site has successfully been removed. Marker: 1kb DNA ladder, NEB

Results

  • Successful mutagenic PCR of gene 1 and transformation into DH5a
  • Ligation of Ara and gene 1 into pSB1C3 and transformation into DH5a

week 13 (13.-17.08.12)

  • Checking the transformation of DH5a with pSB1C3_Ara_505m by using colony-PCR (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
Colony-PCR of DH5a with pSB1C3_Ara_505m. All Colonies are positive. Marker: 1kb DNA ladder, NEB
  • Sequencing pSB1C3_Ara_XylE, pSB1C3_Ara_tctA503m_tctB162m_tphCm (=Operon1), pSB1C3_505m

Results

  • Checking the Transdormation of pSB1C3_Ara_505m
  • Sequencing pSB1C3_Ara_XylE, pSB1C3_Ara_tctA503m_tctB162m_tphCm (=Operon1), pSB1C3_505m
  • We created pSB1C3_Ara_tphCm by ligation

week 14 (20.-24.08.12)

  • Checking the transformation of DH5a with pSB1C3_Ara_tphCm using colony-PCR (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
Colony-PCR of the transformation of DH5a with pSB1C3_Ara_tphCm. Colonies 1, 2, 3, 4, 5, 6, 9,10 and 11 are positive. Marker: 1kb DNA ladder, NEB

Result Ara_tphC was designed

Week 15-19 charakterization and uptake tests

  • Building the construct pSB1C3_Ara_tctA505m_197_tphCm (= Operon2) by ligation. Subsequent transformation into DH5a
  • Checking the transformation of DH5a with Operon2 using colony-PCR (Primers: [http://partsregistry.org/Part:BBa_G00100 VF2], [http://partsregistry.org/Part:BBa_G00101 VR])
Colony-PCR of transformation of DH5a with Operon2. Marker: 1kb DNA ladder, NEB
  • Overexpression of designed parts in E. coli C43 (DE3) to verificating the protein expression and isolation of membranes for SDS-PAGE
Figure 1. SDS-PAGE of isolated membranes after overexpression E Coli strain C43(DE3) carrying 1.putative terephtalate Operon1,2. putative terephtalate Operon2,3.AraC-Pbad ,4.AraC-Pbad_tctA_503 and 5.AraC-Pbad_322 plasmids. From left to right: 3.(5µL),3.(10µL),4.(5µL),4.(10µL),Marker(Aplichem proteinmarker 3,2.(5µL),2.(10µL),5.(5µL),5.(10µL)/(xµL) membranes volume. The SDS PAGE was strained with Coomassie R-250


Three different overnight culture of E Coli strain C43(DE3) carrying putative terephtalate Operon1 ), putative terephtalate Operon2 (BBa_K808007 ) and AraC-Pbad plasmids (BBa_K808000 ) was inoculated 1:100 into fresh 100 mL LB media. At the OD 600 of 0,8-1,0 0,02 % L-(+)-Arabinose (inducer) was added to the cultures and incubated at room tempreture (RT)and shaking at 230 rpm for 6 hours. After the incubation the culltures were centrifuged at 10.00xg and washed 2 times in 5 mL phosphate buffer saline buffer (PBS) and resuspenden in 5 mL PBS. Phenylmethylsulfonyl fluoride (PMSF,1 mM final concentration) and DNAse II (100 U/mL final concentration) was added to the resuspenden cultures and the cells were broked down for 2 times with french press at 10.000 psi. To remove of unbroked cell and debris a centrifugation at 12.000xg for 20 min followed. The supernatan was transfered into a ultrazentrifugation tubes and centrifugated at 100.000xg for 45 min to collect membranes. The pelletts were resuspended in 300 µL PBS and were used as a sample to perfomed a [http://openwetware.org/wiki/Keating:Experimental_Protocols:SDS-PAGE SDS-PAGE.] (Fig.1)

Result

Figure 1 showes no significant protein band. It suggest, that the SDS as a detergent was a wrong choice or the expression of the membrane proteins was to low to detect it, but it´s well known that membrane proteins exhibit a low expression level and thus not able to detect with conventinal SDS-PAGE. For futher analyses we have to amplify the signal with a antibody staining (Conventional Western-Blot analysis).




  • Charakterisation of the AraC-Pbad

The charakterization of the AraC-Pbad is described [http://partsregistry.org/Part:BBa_K808000 here]

Uptake

To verify the corellation between the designed putative terephtalate uptake operons and the uptake of TPA in E. coli, we used three strategies to detected the uptake.


  1. Photometry
  2. Gas chromatography–mass spectrometry (GC-MS)
  3. Energy dispersive X-ray spectroscopy (EDX)


  • 1. Photometric measurement of TPA uptake in different media at 240 nm
Our first strategy to check our designed uptake system operon 1 and operon 2 was to checked the absorbation at 240 nm. For that reason we developed a TPA standard curve in different media.
Figure.1In order to verify the uptake of TPA into bacteria, we studied the influence of TPA on a solution‘s absorbance of light. A decrease in the concentration of TPA by time should result in lowering optical density at its wavelength of extinction. Scanning the spectrum of TPA (80 µM in H2O) with an OD measuring device led to a single peak at a wavelength of approximately 240 nm. Therefore a serial dilution of TPA in H2O was inspected photometrically, ranging in concentration from 400 µM to 50 nM. The measurement‘s results are described by the graphs below. The chart shows a quite accurate linear correlation between TPA-concentration and optical density (series 1; linear section is highlighted in blue color). Note that the curve progression differs more and more from proportionality for concentrations above about 250 µM TPA (red colored section of series 1). We assume the lack of precision of our measuring device when dealing with OD values higher than about 2.5 to be the reason for this stagnation.

In the following series differences between solutions of TPA in H2O and other fluids had to be found where upon M9-medium was of main interest, since this was planned to be used as medium for production of the eventually used modified E. coli. The results are represented in series 2 (green graph). The tight gap between the two curves led us to the decision that their differences was of no significance for our further measurements. An overnight cultures of 'E. Colis DH5apha carrying putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808006 Operon1], putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808007 Operon2] were inoculated 1:100 in a freshly 10 mL M9 minimal medium cultivated shaking at 230 rpm at 30°C. At the OD600 of 0.5 0.001 % L-(+)-Arabinose(inducer) and 100 µM TPA was added and incubated for 6 hours at 30 °C and shaked at shaking 230 rpm. Every hour 500 µL of the cultures was transfered into a 1.5 mL Eppendorf cup and centrifuged at 17xg to spin down the cells for 5 min. Afterwards the TPA concentration was measured at 240 nm.


Result

This strategy did not work. The M9 minimal medium had an absorbation at 240 nm after E. colis were incubated until the OD600 of 0.5. Our assumption is that lyseted E. colis DH5alpha are responsible for the absorbation or E. colis secreteting moleculs into the medium, which are absorbats at 240 nm.


  • 2. Preparation of E. coli strain C43(DE3) carrying the putative terephtalate Operon1, putative terephtalate Operon2 and AraC-Pbad plasmids for the Gas chromatography–mass spectrometry (GC-MS)

Three different overnight culture of E. colis C43(DE3) carrying putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808006 Operon1],putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808007 Operon2] and AraC-Pbad plasmids were inoculated 1:100 into fresh 100 mL LB medium. 0,001% L-(+)-Arabinose (inducer) was added at the optical density (OD600) of 1.3-1.4 and incubated at 30°C for 2 hour, shaked at 230 rpm. Afterwards 2 mL of each cultures were transferred to a new 2 mL Epppendorf cup with each 50,-100,-150, -200,-250,-300,- µM TPA and incubated on a heating-block at 30 °C, shaked at 1000 rpm for 5 hours. After the incubation the cultures were centrifuged at 17.000xg for 15 min. The culture with 100 µM TPA cultures were chosed for GC-MC measurment.The supernatan was transferred into a new Eppendorf cup and the protocol sample preparation for GC-MS was accomplished.

Result

We successfully showed that we are able to qualify and thus quantify TPA-di-methyl-ester via GC-MS. Furthermore, we quantified the operon 1 and operon 2 sample of the transport group. Summarising, we obtained the following peak-areas: operon-1: 43113 operon-2: 38700 control : 32729 Interestingly, we measured a lower concentration of TPA in our control sample. The reason for this might be that the OD of our control sample was higher (0.85) than the OD of our biological samples. Notably, that our untransformed bacteria is able to take TPA up into the periplasma. Nonetheless, due to the the analysis, we measured significant differences in our peak areas. The delta of 4413 digits of Operon-1 to Operon-2 is may be result of a working TPA transport system. For further work we have to measure more samples (biger statistic), measure a control which contains only TPA in the cycl.hexan matrix and using constant ODs by the sample preparations. Moreover, the results have to be compared to HPLC-MS measurements. Unfortunately, the wiki freeze is today, so we are not able to measure again (this time.


For more details: https://2012.igem.org/Team:TU_Darmstadt/Protocols/GC-MS/Results


  • 3. Preparation of E. colis C43(DE3) for the energy dispersive X-ray spectroscopy (EDX)
Figure 2. An electron microscope picture of embedded E. colis C43(DE3) carrying putative terephtalate Operon1

Three different overnight culture of E. colis C43(DE3)' carrying putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808006 Operon1], putative terephtalate [http://partsregistry.org/wiki/index.php?title=Part:BBa_K808007 Operon2] and AraC-Pbad plasmids was inoculated 1:100 into fresh 100 mL LB media. At the OD 600 of 0.8 - 1.0 0.02 % L-(+)-Arabinose (inducer) was added to the cultures and incubated at room tempreture (RT) for 5 hours, shaking at 230 rpm. After the incubation the cultures were cenrifuged 15 min at 10.00xg and the pelletes were prepared for the energy dispersive X-ray spectroscopy (EDX). The cells had to be fixed, embedded in a SPURR-embedding medium (resin) and cut in to small rectangles smaller than 100 nm. For more details: EDX Preparation of Escherichia Coli for the energy dispersive X-ray spectroscopy (EDX) The embedded E. Colis was checked under an electron microscope


Result

The spectra show a clear difference between background and sample measurement. In the background spectra no nitrogen (N) and phosphor (P) occurs. These elements are perfect markers for biological material. Although there is nor clear evidence for the uptake of TPA into the cells. The TAM-EDX experimental set up is a good method to achieve this goal. Unfortunately time is short in the iGEM competition, otherwise we would add a heavy atom like bromide or chloride to TPA. As seen in the spectra non of this elements occur in our sample, which would make it possible to clearly identify the source of a Br/Cl peak as TPA.

For more details: TEM-EDX measurment