Difference between revisions of "Part:BBa K3081032"

Revision as of 19:16, 21 October 2019

pBAD-dCas9-ssrA-J23119-R1+(18bp)

This composite part is the principal design of the inducible CRISPR-based DNA replication interference system, with the 18 bp sgRNA targeting to the R1+ DnaA box on E.coli genome replication initiation region, OriC. In natural situations, R1+ is a high affinity box for DnaA binding. By blocking the binding of DnaA protein to R1+ box using a 18bp sgRNA, alleviation of severe arrest and inhibition to the genome replication initiation is achieved. This part is an improvement of BBa_K3081009, which we add a degradation signal peptide ssrA to the dCas9. This largely accelerates the degradation rate of dCas9 and weakens its overinhibtion on genome replication initiation targeted to the R1 box.

R1+ssrA 20bp

R1+ssrA 19bp

R1+ssrA 18bp

Reference：

[1]Wolański M, Donczew R, Zawilakpawlik A, et al. oriC-encoded instructions for the initiation of bacterial chromosome replication.[J]. Frontiers in Microbiology, 2015, 5(735):735.

Sequence and Features