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From 2010.igem.org

Contents 1 Andreas 1.1 Transfer of pEX.nCPP⋅SOD⋅His to BL21 1.1.1 Glycerol stocks 1.2 Assembly of His⋅SOD⋅cCPP constructs 1.2.1 Colony PCR 1.2.2 Gel verification 1.3 Transfer of nCPP⋅SOD⋅His.RBS.yCCS operon to pEX 1.3.1 Plasmid preps 2 Nina 2.1 Ligation of proteins into peX and CPP containing vectors 2.2 Transformation of ligation products 3 Mimmi 3.1 Protein purification

Andreas

Transfer of pEX.nCPP⋅SOD⋅His to BL21

Glycerol stocks

• BL21 pEX.nLMWP⋅SOD⋅His
• BL21 pEX.nTra10⋅SOD⋅His

Assembly of His⋅SOD⋅cCPP constructs

Colony PCR

1. pSB1C3.His⋅SOD⋅cTra10 A-D
2. pSB1C3.His⋅SOD⋅cTAT A-D
3. pSB1C3.His⋅SOD⋅cLMWP A-D

Standard colony PCR settings

• Elongation time: 1:30

Gel verification

1 % agarose, 120 V

Expected bands

1. 884 bp
2. 854 bp
3. 863 bp

Results
Varying band sized, with the following clones seeming correct:

1. A
2. D
3. B & C

Transfer of nCPP⋅SOD⋅His.RBS.yCCS operon to pEX

Plasmid preps

From 4/10 ON cultures

As I'm still waiting for sequencing results of the operons in pSB1K3, I spun down cells (4,400 x g, 10 min), and saved pellets in -20 °C ON.

• pEX.nTAT⋅SOD⋅His.RBS.yCCS 2: A
• pEX.nTAT⋅SOD⋅His.RBS.yCCS 3: B
• pEX.nTra10⋅SOD⋅His.RBS.yCCS 1: B
• pEX.nTra10⋅SOD⋅His.RBS.yCCS 2: B
• pEX.nLMWP⋅SOD⋅His.RBS.yCCS 2: B
• pEX.nLMWP⋅SOD⋅His.RBS.yCCS 3: B

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Nina

Ligation of proteins into peX and CPP containing vectors

Ligations:

• Fusion protein-His into three vectors each containing all N-terminal CPPs LMWP, TAT and Tra10.

* Gene: 10 ul 
* Vector: LMWP 0.5 ul (25ng), TAT 1 ul (20 ng) and Tra10 1 ul (20 ng)
* Quick Ligation buffer 2X: LMWP 11.5 ul, TAT 12 ul and Tra10 12 ul
* Quick Ligase: 1 ul

• His-Fusion protein into three vectors each containing all C-terminal CPPs LMWP, TAT and Tra10.

* Gene: 6 ul 
* Vector: CPP1 0.5 ul (25ng), TAT 1 ul (20 ng) and CPP3 1 ul (20 ng)
* Quick Ligation buffer 2X: CPP1 7.5 ul, TAT 8 ul and CPP3 8 ul
* Quick Ligase: 1 ul

• Protein A-His into three vectors each containing all N-terminal CPPs LMWP, TAT and Tra10.

* Gene: 12.5 ul 
* Vector: LMWP 0.5 ul (25ng), TAT 1 ul (20 ng) and Tra10 1 ul (20 ng)
* Quick Ligation buffer 2X: LMWP 14 ul, TAT 14.5 ul and Tra10 14.5 ul
* Quick Ligase: 1 ul

• IgG protease_Tra10_Ntermin_#6 into peX vector

* Gene: 7 ul 
* Vector: peX 1 (25ng)
* Quick Ligation buffer 2X: 9 ul
* Quick Ligase: 1 ul

All ligation mixtures were incubated in 22 °C (in a water bath) for 15 minutes. During these minutes I also thawed competent Top 10 cells (100 ul) on ice for transformation of the ligation samples.

Transformation of ligation products

The procedure was according to the method decribed in protocols. However I thawed Top 10 cells (100 ul) in 15 minutes instead of 10. I added 3 ul of ligation samples into each 100 of Top 10 cells.

Mimmi

Protein purification

• Resuspend pellet in

mix
626.85µl	NPI-10/20
3.15µl	imidazole 2M

• Add 70µl lysozyme
  • Add 14µl DNase 20µg/ml -> 14µg
  • Add 0.7µl PMSF 1mM
  • Inbcubate on ice for 15-30min

• Centrifuge lysate at 12,000xg for 20min at 4°C
  • Collect supernatant
  • Save 20µl for SDS-Page

• PhastGel

well	sample
1	ladder
2	SOD 3h
3	SOD.his 0h
4	SOD.his sup.
5	his.SOD 0h
6	his.SOD sup.