"

From 2010.igem.org

Contents 1 Andreas 1.1 Sequencing results 1.2 Plasmid prep 1.3 BL21 transformation 2 Nina 2.1 Colony PCR on Fusion protein and protein A 2.2 Agarose gel 2.3 Mini prep on His-IgG protease and His-Protein A 3 Mimmi 3.1 Protein purification 3.1.1 PhastGel

Andreas

Sequencing results

Received sequencing results for the following samples (fasta):

• pSB1K3.nTra10⋅SOD⋅His.RBS.yCCS 1 (VF2 & VR)
• pSB1K3.nTra10⋅SOD⋅His.RBS.yCCS 2 (VF2 & VR)
• pSB1K3.nTAT⋅SOD⋅His.RBS.yCCS 2 (VF2 & VR)
• pSB1K3.nTAT⋅SOD⋅His.RBS.yCCS 3 (VF2 & VR)
• pSB1K3.nLMWP⋅SOD⋅His.RBS.yCCS 2 (VF2 & VR)
• pSB1K3.nLMWP⋅SOD⋅His.RBS.yCCS 3 (VF2 & VR)
• pEX.nTra10⋅SOD⋅His (pEXf) (fasta)
• pEX.nLMWP⋅SOD⋅His (pEXf) (fasta)

Sequences aligned using Geneious software, showing correct sequences for all constructs. Operon constructs all had an insertion between SpeI and PstI; this will not affect expression.

Plasmid prep

Of stored pellets and ON cultures from 5/10

• E.Z.N.A. Plasmid Miniprep kit
  • 50 μ elution volume (elution buffer)

DNA concentration
Sample	Conc [ng/μl]	A260/A280
pEX.nTAT⋅SOD⋅His.RBS.yCCS	107.5	1.96
pEX.nTra10⋅SOD⋅His.RBS.yCCS	108.7	1.93
pEX.nLMWP⋅SOD⋅His.RBS.yCCS	84.35	1.97
pSB1C3.His⋅SOD⋅cLMWP B	255.4	1.94
pSB1C3.His⋅SOD⋅cLMWP C	201.2	1.94
pSB1C3.His⋅SOD⋅cTAT D	369.5	1.92
pSB1C3.His⋅SOD⋅cTra10 A	188.6	1.95

BL21 transformation

Quick transformation w/ 30 min on ice, 50 sec heat-shock.

• 30 μl competent BL21(DE3)
• 1 μl plasmid
  • pEX.nTra10⋅SOD⋅His.RBS.yCCS
  • pEX.nTAT⋅SOD⋅His.RBS.yCCS
  • pEX.nLMWP⋅SOD⋅His.RBS.yCCS

---

Nina

Colony PCR on Fusion protein and protein A

I screened four colonies per dish.

• Master mix with shipping vector verification primers (VF2 and VR):

• Master mix with peX verification primers:

Agarose gel

I ran the PCR products on an 1 % agarose gel (110 V) in order to confirm the inserts in the desired vectors.

Ladder: MassRuler™ DNA Ladder Mix, ready-to-use, 80-10,000 bp

Arrengement on the gels:

• Results of the gels:

All the Fusion and protein A bands look great, however the IgG protease bands look like they have not any insert which is bad. Tomorrow I'll run an agarose gel on my saved ligation sample of IgG protease in the gel cleaned peX vector. This will allow me to check for vector formation with a correct size and see if there has at least occured a ligation, if so I will run a new colony screen.

Mini prep on His-IgG protease and His-Protein A

I performed a mini prep on the inoculated colonies # 1, 2, 3 and 4 of N-terminal His-IgG protease and inoculated colonies # 1, 2, 3 and 4 of N-terminal His-Protein A.

Mimmi

Protein purification

mix		x2
NPI	597	1194
imidazole	3	6
tot	600µl	1200µl

• Equilibrate column with 600µl buffer NPI-10
  • Centrifuge at 2900rpm for 2min

• Load lysate in the column (max. 600µl)
  • Centrifuge at 1600rpm for 5min (up to 10min)

mix		x7
NPI	594	4158
imidazole	6	42
tot	600µl	4200µl

• Wash 2x (3x) with 600µl buffer NPI-20
  • Centrifuge at 2900rpm for 2min

• Elute 2x with 300µl buffer NPI-500
  • Centrifuge at 2900rpm for 2min
  • Eluate in two different tubes

PhastGel

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