Difference between revisions of "Part:BBa K4169013"

Latest revision as of 10:38, 13 October 2022

A RNA thermometer mutation 4

Based on the characteristics of secondary structure changes of RNA under different temperature conditions, the RNA thermometer element was introduced in this project. An RC sequence is present on this RNA thermometer, which recruits RNase E to degrade subsequent RNA fragments. At low temperatures,such as 27℃, RNA thermometers will maintain the secondary stem-loop structure, and RC sequences will complement and pair with other bases, unable to recruit RNase, so subsequent sequences will be expressed normally. However, at 37℃, the secondary structure opens, and the subsequent RNA fragments are cleaved and degraded by RNA enzymes.We want to change the temperature at which it functions by mutating its gene sequence.So we mutated its gene sequence, that is, the first A after ARC was changed to T, and the eighth A before ARC was changed to G.

Design and Mutation

We designed the mutation primers (Figure 1)and the expected mutation sequences(Figure 2)

Reference

Hoynes-O'Connor A, Hinman K, Kirchner L, Moon TS. De novo design of heat-repressible RNA thermosensors in E. coli. Nucleic Acids Res. 2015 Jul 13;43(12):6166-79.