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Team:TU Delft-Leiden/Project/Life science/curli/cloning
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from Lyon team 2011. | from Lyon team 2011. | ||
| - | In order to introduce the Rhamnose promoter upstream csgB and a constitutive Anderson promoter upstream csgA, the | + | In order to introduce the L-Rhamnose promoter upstream csgB and a constitutive Anderson promoter upstream csgA, the |
<a href="https://2014.igem.org/Team:TU_Delft-Leiden/Project/Life_science/curli/cloning#CC - GG" style="text-decoration: none"" target="_blank"><font color="#0080FF" size="3"><a href="https://2012.igem.org/Team:Freiburg/Project/Golden#GGC">Golden Gate Assembly </a></font></a> was used. | <a href="https://2014.igem.org/Team:TU_Delft-Leiden/Project/Life_science/curli/cloning#CC - GG" style="text-decoration: none"" target="_blank"><font color="#0080FF" size="3"><a href="https://2012.igem.org/Team:Freiburg/Project/Golden#GGC">Golden Gate Assembly </a></font></a> was used. | ||
</p> | </p> | ||
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<h3> Golden Gate Assembly </h3> | <h3> Golden Gate Assembly </h3> | ||
<p> | <p> | ||
| - | To construct our BioBricks <a href="http://parts.igem.org/Part:BBa_K1316013">BBa_K1316013 </a> and <a href="http://parts.igem.org/Part:BBa_K1316014">BBa_K1316014 </a> three pieces of DNA had to be cloned into pSB1C3 . Both BioBricks encode | + | To construct our BioBricks <a href="http://parts.igem.org/Part:BBa_K1316013">BBa_K1316013 </a> and <a href="http://parts.igem.org/Part:BBa_K1316014">BBa_K1316014 </a> three pieces of DNA had to be cloned into pSB1C3 . Both BioBricks encode an L-rhamnose promoter and the coding sequences of <i>csgB</i> and <i>csgA</i> or <i>csgA-HIS</i>. To work efficiently, we used the Golden Gate Assembly to construct our BioBricks. In this way we were able to restrict and ligate all the DNA fragments at once (see figures 3 and 4). |
</p> | </p> | ||
<p> | <p> | ||
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<center><img style="margin-left: -10%;" src="https://static.igem.org/mediawiki/2014/c/c6/TUDELFT2014_goldengateCC.PNG" width="120%"> </center> | <center><img style="margin-left: -10%;" src="https://static.igem.org/mediawiki/2014/c/c6/TUDELFT2014_goldengateCC.PNG" width="120%"> </center> | ||
<figcaption> | <figcaption> | ||
| - | Figure 3. <b>Golden Gate Assembly of <a href="http://parts.igem.org/Part:BBa_K1316013">BBa_K1316013 </a> and <a href="http://parts.igem.org/Part:BBa_K1316014">BBa_K1316014 </a>.</b> The BioBricks both encode | + | Figure 3. <b>Golden Gate Assembly of <a href="http://parts.igem.org/Part:BBa_K1316013">BBa_K1316013 </a> and <a href="http://parts.igem.org/Part:BBa_K1316014">BBa_K1316014 </a>.</b> The BioBricks both encode an L-rhamnose promoter (red rectangle) and the coding sequences of <i>csgB</i> and <i>csgA</i> or <i>csgA-HIS</i>, indicated with grey arrows. The beam beneath the arrows visualizes the regions and relative sizes of the three DNA pieces that were ligated into pSB1C3. |
</figcaption> | </figcaption> | ||
</figure> | </figure> | ||
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both csgB and csgA genes were PCRed directly from the | both csgB and csgA genes were PCRed directly from the | ||
<a href="http://parts.igem.org/Part:BBa_K540000" style="text-decoration: none"" target="_blank"><font color="#0080FF" size="3">BBa_K540000</font></a> | <a href="http://parts.igem.org/Part:BBa_K540000" style="text-decoration: none"" target="_blank"><font color="#0080FF" size="3">BBa_K540000</font></a> | ||
| - | BioBrick from Lyon team 2011 and then placed behind the Rhamnose promoter of the iGEM BioBrick | + | BioBrick from Lyon team 2011 and then placed behind the L-Rhamnose promoter of the iGEM BioBrick |
<a href="http://parts.igem.org/Part:BBa_K914003" style="text-decoration: none"" target="_blank"><font color="#0080FF" size="3">BBa_K914003</font></a>. | <a href="http://parts.igem.org/Part:BBa_K914003" style="text-decoration: none"" target="_blank"><font color="#0080FF" size="3">BBa_K914003</font></a>. | ||
Revision as of 14:22, 17 October 2014
Module Conductive Curli – Cloning
Inducible csgB, constitutive csgA/ csgA-HisTag
Final constructs
The final BioBricks are BBa_K1316013 and BBa_K1316014 (figures 1 and 2)
Cloning Scheme
For the construction of the final BioBricks BBa_K1316013 and BBa_K1316014, the two curli genes used (csgA and csgB) were obtained from the iGEM BioBrick BBa_K540000 from Lyon team 2011. In order to introduce the L-Rhamnose promoter upstream csgB and a constitutive Anderson promoter upstream csgA, the Golden Gate Assembly was used.Golden Gate Assembly
To construct our BioBricks BBa_K1316013 and BBa_K1316014 three pieces of DNA had to be cloned into pSB1C3 . Both BioBricks encode an L-rhamnose promoter and the coding sequences of csgB and csgA or csgA-HIS. To work efficiently, we used the Golden Gate Assembly to construct our BioBricks. In this way we were able to restrict and ligate all the DNA fragments at once (see figures 3 and 4).
Therefore, three PCR fragments were generated, all of them properly designed so that, during the Golden Gate Assembly, the three fragments could only be assembled in the desired order and orientation.
Due to the small size of the constitutive Anderson promoter used ( BBa_J23110 ), the first half of the promoter was included at the 3' ending of the csgB reverse primer; and the second half of the promoter was included at the 5' ending of the csgA forward primer. As a consequence, the promoter would be properly reconstituted during the Assembly.
Note: the construct with CsgA carrying the 6xHisTag (BBa_K1316014) was made the same way as BBa_K1316013 but the reverse primer amplifying csgA was designed in order to incorporate the Tag right before the STOP codon of this gene.
Inducible csgB and csgA
Final constructs
The final BioBrick is BBa_K1316015 (figure 5)
Cloning Scheme
For the construction of this BioBrick ( BBa_K1316015), both csgB and csgA genes were PCRed directly from the BBa_K540000 BioBrick from Lyon team 2011 and then placed behind the L-Rhamnose promoter of the iGEM BioBrick BBa_K914003.
Constitutive eGFP
Final constructs
The final BioBrick is BBa_K1316016 (figure 7)
Cloning Scheme
The BioBrick ( BBa_K1316016) was constructed amplifying the coding region of the Enhanced Green Fluorescent Protein (eGFP) from a comercial plasmid and placing it downstream the constitutive Anderson promoter ( BBa_J23110 ) on its Original iGEM plasmid.
