Difference between revisions of "Part:BBa K3815013"

Revision as of 16:34, 21 October 2021

Part of the EPH1 gene of Ipomoea nil to synthesize dsRNA for RNAi
This is a section of EPH1 gene of Ipomoea nil to synthesize dsRNA for RNAi. To product dsRNA, this sequence is inserted in L4440 plasmid, and transformed into HT115(DE3).

purpose

This is a gene for a transcription factor that positively regulates PCD in Ipomoea nil. Silencing this gene is expected to extend the flowering time of Ipomoea nil.

Usage and Biology

RNAi
RNAi (RNA interference) is a process in which externally introduced dsRNA suppresses the expression of genes that have complementary sequences to the dsRNA.

L4440
L4440 is a plasmid vector having two convergent T7 promoters adjacent to the multi-cloning site. By inserting a portion of the target gene sequence into the multi-cloning site of this plasmid, the target sequence is transcribed from both sides, and dsRNA can be obtained when both parts anneal.

HT115(DE3)
HT115 (DE3) is an RNase III-deficient E. coli strain that has been modified to express T7 RNA polymerase from an IPTG-inducible promoter. It lacks dsRNA-specific RNase III, which allows it to produce high levels of specific dsRNA. These attributes allow HT115 (DE3) to be a promising strain for the preparation of large amounts of viral dsRNA in vivo.

Sequence and features

cloning

This part was inserted in L4440. The L4440 has two t7 promoters, and this ​part are transcribed from both sides.

Reference

1 Andongma, A.A., Greig, C., Dyson, P.J., Flynn, N., and Whitten, M.M.A. (2020). Optimization of dietary RNA interference delivery to western flower thrips Frankliniella occidentalis and onion thrips Thrips tabaci. Arch. Insect Biochem. Physiol. 103, e21645.