Team:Bielefeld-Germany/Labjournal/week20
From 2012.igem.org
Contents |
Week 20 (09/10 - 09/16/12)
Monday September 10th
- Team Cultivation & Purification:
- Cell disruption via high-pressure homogeniser and purification via Ni-NTA column were performed for the following samples: 3L fermentation of E.coli KRX with laccase from B.pumilus (09/09), 6L fermentation of E.coli KRX with laccase from E.coli (09/07) and B.pumilus (09/09).
- We made SDS-Pages of purification of laccase from B.pumilus
- Team Site Directed Mutagenesis:
- Digestion of the six tvel10-plasmids. Three were unmutated and other three hadn't lost the illegal SpeI-restriction-site, but their second fragment was of a smaller size.
- plated three additional tvel-t243g-colonies.
Tuesday September 11th
- Team Shuttle Vector: Digest of shuttle shuttle vector with PvuII and HindIII as control. Agarose gel looks good.
- Fungal Laccases: PCR on tvel5 laccase for cloning in shuttle vector. Digest of shuttle vector and digest of tvel35 with AarI enzyme.
Wednesday September 12th
- Team Site Directed Mutagenesis:
- Plasmid-isolation of the three tvel10-plasmids and digestion with SpeI showed two unmutated plasmids and one with the same wrong restriction-fragments as Monday. There must be a systematical error. pfu-PCR should be done again.
Thursday September 13th
Friday September 14th
- Team Cellulose Binding Domain:
- Isolated three glowing colonies with the constitutive GFP_His, three with ClosF 36-38 and Cex 43, 45, 46
Saturday September 15th
- Team Cellulose Binding Domain:
- KRX culture of CBDcex(T7)-GFP_His seems to have a green glow.
- Isolation of four pellets of CBDcex(T7)-GFP_His for us and SDU Denmark.
- CBDclos(T7) cut with SpeI+AgeI and deposphorylated.
- GFP_Freiburg (PCR) Gel-clean cut with SpeI and NgoMIV.
- Ligated and plated on select-Agar.
- Restriktionanalysis showed that all GFP_His plasmids are correct, as are the three CBDclos and two of the CBDcex
- Collect data to make a protocol for a Cellulose binding assay:
- Avicel: about 11,4 mg protein (CBD) binds to 1 g Avicel (0,14 mg/12,3 mg)
- Duration of incubation for CBD to bind to Avicel: about 30 minutes
- Washing and Lysis-buffer: 50mM Tris-HCl (pH8.0)
- If needed: elution with 80% EG or 1/5 Pellet to 4/5 EG (100%) of the overall volume.
Sunday September 16th
- Team Cellulose Binding Domain:
- Colony-PCR of 15 colonies from the CBDclos(t7)+GFP_His transformation-plate (biotaq - Armins recipe) with the result of the positive clones.
- Prepared the sequencing of GFP_Freiburg 6-8 (1-3) CBDclos 1-3 (36-38) and CBDcex 1-2 (43, 45)
- CBDcex(T7)+GFP_His isn't glowing anymore, or never was.
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