Difference between revisions of "Part:BBa K3059619"

Revision as of 17:17, 16 October 2019

csgBAC + 22 bp upstream

csgBAC operon isolated from the E. coli (MG1655) genome via PCR. Contains 22 bp upstream region, so an additional RBS is unnecessary when assembling transcriptional units with this part. The native curli operon contains two divergent operons: csgBAC as well as csgDEFG. To create a synthetic curli operon, csgEFG is necessary as well as csgBAC (for example, though csgA is the main subunit of the eventual fiber, csgG is responsible for fiber export out of the cell). csgD regulates csgBAC, and is thus unnecessary in a synthetic operon where both component operons are combined under the control of one promoter.

When successfully assembled in a transcriptional unit with a promoter, csgEFG, an RBS preceding csgEFG, and a terminator, this part results in curli amyloid fiber production. Curli fibers are native to E. coli and contribute to biofilm formation and strength.

Though this part contains a non-Biobrick PstI cut site, it lacks BsaI cutsites and is thus type IIS compatible and legal.

Sequence and Features