Team:Shenzhen/Result/YAO.Suicider

From 2012.igem.org

Revision as of 17:55, 26 September 2012 by BGI K2 (Talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)




Yao.028-001.jpg

Contents

Result Summary

    In the experiment part of suicide, we have succefully engineered GAL1 promoter, lambda phage holin, and linked GAL1 promoter with yeast GFP, yeast RFP and lambda phage holin respectively.

Preview for Whole Experiments

        GAL1 promoter + kozak sequence + signal peptide to mitochondria + T7 RNAP + ADH terminator (backbone:YEP325)

        T7 promoter + mt RBS + DNase I + terminator for mitochondria (under experiment)

        DLD3 promoter + kozak sequence + Holin + degradation tag + ADH terminator (under experiment)

Identification for Engineering GAL1 Promoter without Downstream ATG Start Codon

    0. This is based on BBa_J63006 and is without ATG start codon. We point-mutate the ATG to ACG. It is more convenient to use. There is ATG in GAL1 promoter RBS which can change read frame.

    1. >BBa_J63006 Part-only sequence (549 bp)

    ccccattatcttagcctaaaaaaaccttctctttggaactttcagtaatacgcttaactgctcattgctatattgaagtacggattagaagccgccgagcgggtgacagccctccgaaggaagactctcctccgtgcgtcctcgtcttcaccggtcgcgttcctgaaacgcagatgtgcctcgcgccgcactgctccgaacaataaagattctacaatactagcttttatggttatgaagaggaaaaattggcagtaacctggccccacaaaccttcaaatgaacgaatcaaattaacaaccataggatgataatgcgattagttttttagccttatttctggggtaattaatcagcgaagcgatgatttttgatctattaacagatatataaatgcaaaaactgcataaccactttaactaatactttcaacattttcggtttgtattacttcttattcaaatgtaataaaagtatcaacaaaaaattgttaatatacctctatactttaacgtcaaggaggaaactagacccgccgccacc<red>atg</red>gag

    The backbone for it BBa_J63010 is for combinant protein.

    2. >Engineered GAL1(gz-GAL1)

    ccccattatcttagcctaaaaaaaccttctctttggaactttcagtaatacgcttaactgctcattgctatattgaagtacggattagaagccgccgagcgggtgacagccctccgaaggaagactctcctccgtgcgtcctcgtcttcaccggtcgcgttcctgaaacgcagatgtgcctcgcgccgcactgctccgaacaataaagattctacaatactagcttttatggttatgaagaggaaaaattggcagtaacctggccccacaaaccttcaaatgaacgaatcaaattaacaaccataggatgataatgcgattagttttttagccttatttctggggtaattaatcagcgaagcgatgatttttgatctattaacagatatataaatgcaaaaactgcataaccactttaactaatactttcaacattttcggtttgtattacttcttattcaaatgtaataaaagtatcaacaaaaaattgttaatatacctctatactttaacgtcaaggaggaaactagacccgccgccacc<red>acg</red>gag

    The backbone for it is T vector, it can be linked to PSB1A3 or PSB1A2 in standard BioBrick format.

    3. Primer for engineering:

    PGALF1 5'-GTTTCTTCGAATTCGCGGCCGCTTCTAGAGCCCCATTATCTTAGCCTA

    PGALR1 5'-GTTTCTTCCTGCAGCGGCCGCTACTAGTACTC<red>CGT</red>GGTGGCGGCGGGTC

    4. GAL 1 Promoter Construction Identification:

    Result yao suicider p1.jpg

    Figure 1. Sanger sequencing diagrams for GAL1 Promoter mutant.

    Result yao suicider p2.jpg

    Figure 2. Sequencing result comparison diagram. The cyan one means BBa standard prefix and suffix from standard part fabrication. The black one means GAL 1 promoter, and ATG start codon in the final is replaced by ACG.

    As learn from the diagram, we have successfully constructed the GAL 1 promoter without ATG.

Identification for Engineering Lambda Holin into BBa Format

    0. Due to that BBa_K112306 (lambda holin) is in BBb format and is inconvenient to use. We change it to BBa format. This is used to form pores on the outer membrane of mitochondria and ER to release apoptosis factor to repress yeast cells.

    1. Origin holin and its adaptor:

    GAATTCatgAGATCT

    Atgccagaaaaacatgacctgttggccgccattctcgcggcaaaggaacaaggcatcggggcaatccttgcgtttgcaatggcgtaccttcgcggcagatataatggcggtgcgtttacaaaaacagtaatcgacgcaacgatgtgcgccattatcgcctggttcattcgtgaccttctcgacttcgccggactaagtagcaatctcgcttatataacgagcgtgtttatcggctacatcggtactgactcgattggttcgcttatcaaacgcttcgctgctaaaaaagccggagtagaagatggtagaaatcaataa

    GGATCCtaaCTCGAG

    The backbone for it BBa_J63010 is for combinant protein.

    2. >Engineered holin and its adaptor:

    GTTTCTT C GAATTC GCGGCCGC T TCTAG ag

    Atgccagaaaaacatgacctgttggccgccattctcgcggcaaaggaacaaggcatcggggcaatccttgcgtttgcaatggcgtaccttcgcggcagatataatggcggtgcgtttacaaaaacagtaatcgacgcaacgatgtgcgccattatcgcctggttcattcgtgaccttctcgacttcgccggactaagtagcaatctcgcttatataacgagcgtgtttatcggctacatcggtactgactcgattggttcgcttatcaaacgcttcgctgctaaaaaagccggagtagaagatggtagaaatcaataa

    T ACTAGT A GCGGCCG CTGCAG G AAGAAAC

    The backbone for it is T vector, it can be linked to PSB1A3 or PSB1A2 in standard BioBrick format.

    3. Primer for engineering:

    Holin-F GTTTCTTCGA ATTCGCGGCC GCTTCTAGAG ATGCCAGAAA AACATGACCT

    Holin-R GTTTCTTCCT GCAGCGGCCG CTACTAGTAT TATTGATTTC TACCATCTT

    4. Holin Construction Identification:

    Result yao suicider p3.jpg

    Figure 3. Sanger sequencing diagrams for Lambda Holin modification.

    Result yao suicider p4.jpg

    Figure 4. Sequencing result comparison diagram. The cyan one means BBa standard prefix and suffix from standard part fabrication. The black one means the coding gene of lambda phage holin.

    As learn from the diagram, we have successfully constructed the Lambda holin in BBa format.

Identification for Bioparts
  • GAL1 promoter +E0030(GFP)

    Result yao suicider p5.jpg

    Figure 5. Sequencing result comparison diagram for GAL1 promoter +E0030(GFP).

  • GAL1 promoter +E1010(RFP)

    Result yao suicider p6.jpg

    Figure 6. Sequencing result comparison diagram for GAL1 promoter +E1010(RFP).

  • GAL1 promoter +lamda holin

    Result yao suicider p7.jpg

    Figure 7. Sequencing result comparison diagram for GAL1 promoter +lamda holin.

Protocol: Point mutation to GAL1 Promoter

    1. Plasmid extraction of GAL1 promoter (BBa-J63005)

    2. Point mutation:

        Primers

            > PGALF1   5'-GTTTCTTCGAATTCGCGGCCGCTTCTAGAGCCCCATTATCTTAGCCTA

            > PGALR1   5'-GTTTCTTCCTGCAGCGGCCGCTACTAGTACTCCGTGGTGGCGGCGGGTC

        BBa-J63005    20ng

        Ex Taq    0.5ul

        10 X Ex Buffer    2ul

        Dntp Mix    1ul

        PGALF    0.5ul

        PGALR1    0.5ul

        ddH2O    20ul

        94℃    3min

        94℃    30s

        55℃    30s

        72℃    30s

        72℃    10min

        12℃    ∞

        30 cycles

    3. Gel electrophoresis

    Gal1.jpg

    Figure 8.  Channel 1: Marker100bp  Channel 2: PCR result

    4. Gel recovery(QIAGEN)

    5. Digestion:

        gz-GALproduction    17ul

        PSB1A2linear backbone    400ng

        EcoRI    0.5ul

        EcoRI    0.5ul

        PstI    0.5ul

        PstI    0.5ul

        10 x H Buffer    2ul

        10 x H Buffer    2ul

        ddH2O    20ul

        37oC X 1h, 80oC X  20min

    6. Tranformation:

        As above.

    7. Colony PCR:

        As above.

        Prefix

            5' GTTTCTT C GAATTC GCGGCCGC  T  TCTAGA  G   [part] 3'

            3' CAAAGAA G CTTAAG CGCCGGCG  A  AGATCT  C   [part] 5'

        Suffix

            5' [part] T ACTAGT  A  GCGGCCG CTGCAG G AAGAAAC   3'

            3' [part] A TGATCA  T  CGCCGGC GACGTC C TTCTTTG   5'

    Gal2.jpg

    Figure 9.  Channel 1:maker(100-6000)  Channel 2-6:pcr result for sample

    8. Sequencing


Protocol: Test of T7 RNAP Function in Nucleus
  • I. Construction of Vector

    1. Bacterial culture (BBa_I712074(T7 poromter,Amp resistant or Kana resistant),E0840(GFP generator,Amp resistant)

    2. Plasmid extraction for BBa_I712074,E0840( Tiangen normal plasmid extraction kits

    3. Measure the concentration of plasmid by NANODROP 2000(Thermo)

    4. Digestion: (enzymes are all from Takara

        BBa_I712074    2-3ug

        PstI    2ul

        SpeI    2ul

        10 x H Buffer    5ul

        ddH2O    50ul

        E0840    2-3ug

        XbaI    2ul

        PstI    2ul

        10 x H Buffer    5ul

        ddH2O    50ul

        37oC    3h

        80 oC     20min

    5. Electrophoresis:

        1% agarose gel, 120V, after 45min,EB dye.

    6. Gel recovery of GAL(EcoRI/SpeI), Holin(XbaI/PstI) (QIAquick Gel recovery kits)

    7. Measure the concentration of fragment of interest by NANODROP 2000(Thermo)

    8. Linage:

        BBa_I712074 ((stI/SpeI)    2ul

        E0840 (PstI/XbaI)    6ul

        T4 ligase    1ul

        T4 ligase Buffer    1ul

        16 oC    3 hours

    9. Transduction:

        1. UV sterilization half an hour before, get DH5a (competent yeast) out of fridge, thawing in water bath.

        2. 10μlinkage production with 50μl competent yeast cells, ice-bath for 30mins.

        3. 42oC ice-bath heat shock for 50s.

        4. Stewing on ice for 2mins.

        5. Add 500μl LB medium without antibiotic, 37℃ shaking(225rpm/min), recover it for culturing it for 1 hour.

        6. 3000rpm/min for 5mins, abandon the supermate, mixing the left.

        7. 60μl broth spread the Amp anti-LB solid plat, 37℃ inversed culture in incubation overnight.

    10. Colony PCR:

        dNTPmix(2.5mM)    1μl

        PCR 10×buffer2μl

        VF    0.5μl

        VR    0.5μl

        Ex Taq    0.5μl

        H2O    15.5μl

        Primer

            VF:    TGCCACCTGACGTCTAAGAA

            VR:    ATTACCGCCTTTGAGTGAGC

        94℃    3min

        94℃    30s

        55℃    30s

        72℃    1min

        72℃    10min

        12℃    ∞

        30 cycles

    11. 1%~1.5% agarose gel electrophoresis, <130V, 40mins.

    12. Sequencing:

        Pick the positive colony(colony PCR verification), marking lines and culture(Cmr resistant), sequencing. Name the right vector PSB1AK3-T7 poromter+GFP+T7 terminater

  • II. Construction of Yeast Expression Vector

    1. Culture of PSB1AK3-T7 poromter+GFP+T7 terminater (Cmr resistant)gz-YEP352(AmpResistant, we have replaced the URA mark with trp mark)

    2. Plasmid extraction: PSB1AK3-T7 poromter+GFP+T7 terminater,gz-YEP352

    3. Digestion:

        Gz-YEP352    2ug

        XbaI    2ul

        PstI    2ul

        10 x H Buffer    5ul

        ddH2O        50ul

        PSB1AK3-T7 poromter+GFP+T7 terminater    2ug  

        XbaI    2ul

        Pst    2ul

        10 x H Buffer    5ul

        ddH2    50ul

    4. Electrophoresis:

        1% agarose gel, 120V, after 45min,EB dye.

    5. Gel recovery of gz-YEP352 (XbaI /PstI)PSB1AK3-T7 poromter+GFP+T7 terminater (XbaI / PstI) (Qiagen Gel recovery kits)

    6. Lingake:

        Gz-YEP352 (XbaI /PstI)    100ng

        PSB1AK3-T7 poromter+GFP+T7 terminater    100ng

        T4 buffer    1ul

        T4 ligase    1ul

        ddH2O    10ul

        16oC    overnight

    7. Transduction:

        1. UV sterilization half an hour before, get DH5a (competent yeast) out of fridge, thawing in water bath.

        2. 10μlinkage production with 50μl competent yeast cells, ice-bath for 30mins.

        3. 42oC ice-bath heat shock for 50s.

        4. Stewing on ice for 2mins.

        5. Add 500μl LB medium without antibiotic, 37℃ shaking(225rpm/min), recover it for culturing it for 1 hour.

        6. 3000rpm/min for 5mins, abandon the supermate, mixing the left.

        7. 60μl broth spread the Amp anti-LB solid plat, 37℃ inversed culture in incubation overnight.

    8. Clony PCR: <p>    dNTPmix(2.5mM)    1μl

        PCR 10×buffer    2μl

        M13_pUC_fwd_primer    0.5μl

        M13_reverse_primer    0.5μl

        Ex Taq    0.5μl

        H2O    15.5μl

        94℃    3min

        94℃    30s

        55℃    30s

        72℃    1.5min

        72℃    10min

        12℃    ∞

        30 cycles

    9. 1.5% agarose gel electrophoresis, <130V, 40mins.

    10. Sequencing:

        Pick the positive colony(colony PCR verification), marking lines and culture(Cmr resistant), sequencing. Name the right vector:EP352-GAL1,Holin-ADH1

  • III. Yeast Transformation Experiment:

    1. plasmid extraction.

    2. Preparation  of Competent Yeast Cells - LiAc Method

        1.treak a YPDA agar plate with a small portion of AH109 or Y187. Incubate the plate upside down at 30°C until colonies appear(~3days). Yeast strains can be stored for up to 1 month at 4°C on YPDA medium in culture plates.

        2.Prepare 1.1X TE/LiAc Solution

        3.Prepare YPDA liquid medium (Yeast Protocols Handbook)

        4.Inoculate one colony(<4 weeks old, 2–3mm in diameter) into 3ml of YPDA medium in a sterile, 15-ml   centrifuge tube.

        5.Incubate at 30°C with shaking    for   8hr.

        6.Transfer 5µl of the culture  to a 250-ml flask containing  50ml of YPDA.

        7.Incubate at 30°C with shaking at 230–250 rpm for   16–20hr.The OD600 should reach 0.15–0.3.

        8.Centrifuge the cells at 700 x g for 5min at room temperature.

        9.Discard the supernatant and resuspend the  cell  pellet in 100 ml of YPDA.

        10.Incubate at 30°C for 3–5hr (OD600= 0.4–0.5).

        11.Centrifuge the cells at 700 x g for 5min at room  temperature.

        12.Discard the supernatant and resuspend the cell pellet in 60ml of sterile, deionized H2O.

        13.Centrifuge the cells at 700 x g for 5min at room  temperature.

        14.Discard the supernatant and resuspend the cells in 3 ml of 1.1 X TE/LiAc Solution.

        15.Split the resuspension between two 1.5-ml microcentrifuge tubes (1.5 ml per tube).

        16.Centrifuge each tube at high speed for 15 sec.

        17.Discard the supernatant and resuspend each pellet in 600 µl of 1.1 X TE/LiAc Solution.

    3.Transformation:

        1. Gz-YEP352-T7poromter+GFP+T7terminater 0.2ug

        Sperm DNA*(10 mg/ml) 0.1mg

        Sperm DNA  :when prepared, water-bath boiling for 20mins, then ice-bath, -20°C preservation.

        2. 100 ul dense medium of yeast competent cell by 1×TE/LiAc. Whirlpool oscillation.

        3. 600 ulPEG/LiAc, oscillation strongly, 30°C,200rpm, culture oscillating for 30mins.

        4. Add 70ul DMSO, mixing it slightly and 42oC heat shock by water-bath for 15mins, ice-bath for 1-2mins

        5. Centrifuging for 14,000rpm for 5sec, abandon the supermate, 0.1ml 1x TE suspense the cell precipitation, spread it to SD/ -Ura-trp solid plat, 30°C culture reversely for 3 days.

    6. Holin function identification:

        Pick a SD/ -Ura-trp-cultured colony and inoculate it to 50ml YPDA medium, 30°C,220rpm culture reelingly to OD-0.1, transfer 20ml to 50ml sterile medium (alpha-galactose), versus is added by equivalent water. Measuring the OD value one time for one hour and drawing the curve.

        Result analyzation:

            If the bacteria in alpha-galactose show flurorescence, that shows T7 RNAP/T7 promoter can work.

Protocol: Holin Adaptor Engineering

    1. Plasmid extraction of BBa-K112306(holin)

    2. Point mutation:

        Primers

            > Holin-F GTTTCTTCGA ATTCGCGGCC GCTTCTAGAG ATGCCAGAAA AACATGACCT

            > Holin-R GTTTCTTCCT GCAGCGGCCG CTACTAGTAT TATTGATTTC TACCATCTT

        BBa-K112306    20ng

        Ex Taq    0.5ul

        10 X Ex Buffer    2ul

        Dntp Mix    1ul

        Holin-F    0.5ul

        Holin-R    0.5ul

        ddH2O    20ul

        94℃    3min

        94℃    30s

        55℃    30s

        72℃    30s

        72℃    10min

        12℃    ∞

        30 cycles

    3. Gel electrophoresis

    Holin1.jpg

    Figure 10.  Channel 1:marker(100BP)  Channel 2:holin

    4. Gel recovery(QIAGEN)

    5. T clone of holing(TAKARA T clone kits)

    6. Colony PCR:

        Ex Taq    0.5ul

        10 X Ex Buffer    2ul

        Dntp Mix    1ul

        M13-47    0.5ul

        RV-M    0.5ul

        ddH2O    20ul

        94℃    3min

        94℃    30s

        55℃    30s

        72℃    30s

        72℃    10min

        12℃    ∞

        30 cycles

    Holin2.jpg

    Figure 11.  Channel 1:maker(100bp)  Channel 3-6 :5 strain contains holin

    7. Digestion Verification:

        Plasmid T-holin    100ng

        XbaI    0.5ul

        PstI    0.5ul

        1 X M buffer    2ul

        ddH2O    20ul

        37oC 3 hours

    Holin3.jpg

    Figure 12.  Channel 1 :maker100bp  channel 2: Holin digestion

    8. Sequencing