Difference between revisions of "Part:BBa K3365009"

Revision as of 19:21, 27 October 2020

Lure3 sequence downstream of pBAD

The PAM and potential off-target sequence are located directly downstream of the promoter (BBa_K3365003), where dCas9 might bind wrongly and block RNAP. In our part, the “lure3” is the potential off-target sequence for PDCD1 CRISPR gene editing predicted by our off-target predictor software built in 2019, which might be identified and bound by the complex of dCas9 and sgRNA. According to the off-target predictor software, the relative off-target rate is 73.6673%.

Usage and Biology

This part is used to combine the signal of arabinose and the off-target or not of dCas9. The uninduced transcriptional level downstream the signaling is very low. In the presence of arabinose, transcription from the pBAD promoter is turned on. In the presence of both arabinose and the complex of dCas9 and sgRNA, the complex might bind to the lure3 sequence and the transcription might be partially inhibited because of the potential block of RNAP.

Rerults

The lure3 sequence is added to the promoter of the L-arabinose operon of E. coli (pBAD) (BBa_K3365003) by PCR. The eletrophoretic profile of the PCR product and the sequencing result reveal the successful construction of the fragment.

This part is characterized in combination with BBa_K3365054, and the resulting part is submitted as BBa_K3365017. BBa_K3365009 and BBa_K3365054 are ligated through overlap PCR.

Sequence and Features