Team:Warsaw/Calendar-Main/29 July 2008

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Cloning of omega_A DNA fragment to pACYC177+OmpA_alpha

Michał K.

  1. Isolation of pKS+omega_A from culture inoculated on previous day.
  2. Digest of pKS+omega_A with SacI and NotI (BamHI buffer).
  3. Digestion (SacI and NotI) and dephosphorylation (CIAP) of pACYC177+OmpA_alpha.
  4. Gel electrophoresis and gel-out of 4300 bp (pACYC177+OmpA_alpha) and 550 bp (omega_A) bands.
  5. Ligation of DNA fragments from 2. and 4. (1 hr)
  6. Transformation of E. coli TOP10 strain with ligation.
  7. Transformants plating on LB + kanamycin.

Checking if OmpA_omega_A_alpha gives ampicillin resistance
Piotr

Inoculation OmpA_omega_A_alpha from various IPTG concentrations (in mmol/mL) (0, 0.1, 0.25, 0.5, 0.75, 1) into same IPTG concentrations, but with various ampicillin concentrations (in mmol/mL)(25, 50, 75, 100) in ratio: 1:50.

Measurement of bacterial culture growth (OD) in the evening:

ampicillin concentration (μg/mL):IPTG concentration (mmol/mL):
00.10.250.50.751
251.5581.4691.5871.491.5661.311
501.4251.4351.5241.0550.9200.935
751.090.9891.4470.9710.9510.992
1000.090.6851.3781.0780.9770.992

Inoculation of OmpA_omega_A_alpha into various IPTG concentrations: 0, 0.1, 0.25, 0.5, 0.75 mmol/mL (replication is necessary)

Checking OmpA_omega_A_alpha and OmpA_A_alpha expression
Piotr

  1. Spinning
  2. Suspending
  3. Adding of lysis buffer
  4. Boiling
  5. Putting into poliacrylamide gel
  6. Transfer onto nitrocellulose
  7. Blocking
  8. Anti-A antibody binding
  9. Washing
  10. Anti-rabbit antibody binding
  11. Developing with BCIP and NBT
[a photo of the gel is top be put here]

Michał L., Ewa, Marcin

  1. Separate transformant colonies (transformation from previous day) inoculated to liquid LB with kanamycin.
  2. Inoculation of pACYC177+OmpA_alpha and pACYC177+OmpA_omega - liquid LB with kanamycin.