Team:Warsaw/Calendar-Main/30 July 2008

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(Difference between revisions)
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<li>Gel electrophoresis (<a href="https://2008.igem.org/Team:Warsaw/Calendar-Main/3_September_2008#fig3">Fig. 3</a>) and <a href="https://2008.igem.org/wiki/index.php?title=Wiki/Team:Warsaw/protocols#DNA_isolation_from_agarose_gel">gel-out</a> of 250 bp band. </li>
<li>Gel electrophoresis (<a href="https://2008.igem.org/Team:Warsaw/Calendar-Main/3_September_2008#fig3">Fig. 3</a>) and <a href="https://2008.igem.org/wiki/index.php?title=Wiki/Team:Warsaw/protocols#DNA_isolation_from_agarose_gel">gel-out</a> of 250 bp band. </li>
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<a name="fig3"><img src=" https://static.igem.org/mediawiki/2008/8/8f/Go2_30_09_2008na30_09.jpg" width=300/></a><var><b>Fig. 3. PCR amplified truncated protein A</b><br>  
+
<a name="fig3"><img src="https://static.igem.org/mediawiki/2008/c/c4/Go_26_08_2008.jpg" width=300/></a><var><b>Fig. 3. PCR amplified truncated protein A</b><br>  
1. Marker<br>
1. Marker<br>
2. PCR product (deltaA), temperature of annealing = 60&deg;C, 20 cycles<br></var>
2. PCR product (deltaA), temperature of annealing = 60&deg;C, 20 cycles<br></var>

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Purification of proteins: Z-alpha and Z-omega

Piotr, Emilia

  1. pET15b+Z_alpha and pET15b+Z_omega in Rosetta strain from overnight culture inoculated in fresh LB and cultured until OD=0,5.
  2. Cultures induced with different concentrations of IPTG in 22°C and 37°C.
  3. Samples were collected twice: after 3h and next day (samples were centrifuged and frozen).

Cloning of omega_ΔA DNA fragment to pACYC177+OmpA_alpha

Michał K.

Separate transformant colonies (tranformation of ligation of pACYC177+OmpA_alpha and omega_ΔA from previous day) inoculated to liquid LB with kanamycin.

Cloning of truncated fragment of protein A (ΔA)

Michał K.

  1. Optimization of PCR to obtain truncated fragment of protein A DNA.
    Primers: AL+SacI AP+NotI
    Template DNA: pDRIVE-TapTag
    Elongation time: 30s
    - Optimization of annealing temperature (gradient from 55°C to 75°C) )Fig. 1.).
    - Optimization of number of cycles(15, 20, 25, 30, 35) (Fig. 2.).
  2. PCR to obtain truncated A protein DNA fragment.
    Primers: AL+SacI AP+NotI
    Template DNA: pDRIVE-TapTag
    Elongation time: 30s
    Annealing temperature: 60°C
    20 cycles
  3. Gel electrophoresis (Fig. 3) and gel-out of 250 bp band.
  4. Fig. 3. PCR amplified truncated protein A
    1. Marker
    2. PCR product (deltaA), temperature of annealing = 60°C, 20 cycles
  5. Digest of isolated PCR product, pACYC177+OmpA_alpha and pACYC177+OmpA_omega with NotI and SacI (BamHI buffer). pACYC177 vectors were also dephosphorylated.
  6. Clean-up of digest reaction.
  7. Gel electrophoresis for estimation of DNA concentration.
  8. Overnight ligation: pACYC177+OmpA_alpha + ΔA and pACYC177+OmpA_omega + ΔA.
Fig. 1. Gradient PCR to obtain truncated protein A (temperatures: 55-75°C)
1. Marker
2. 50°C
3. 55°C
4. 60°C
5. 65°C
6. 70°C
7. 75°C
Fig. 2. PCR to obtain truncated protein A (various number of cycles)
1. Marker
2. 15 cycles
3. 20 cycles
4. 25 cycles
5. 30 cycles
6. 35 cycles