Assessing in vivo the impact of gene context on transcription through DNA supercoiling.

ABSTRACT: Gene context can have significant impact on gene expression but is currently not integrated in quantitative models of gene regulation despite known biophysical principles and quantitative in vitro measurements. Conceptually, the simplest gene context consists of a single gene framed by two topological barriers, known as the twin transcriptional-loop model, which illustrates the interplay between transcription and DNA supercoiling. In vivo, DNA supercoiling is additionally modulated by topoisomerases, whose modus operandi remains to be quantified. Here, we bridge the gap between theory and in vivo properties by realizing in Escherichia coli the twin transcriptional-loop model and by measuring how gene expression varies with promoters and distances to the topological barriers. We find that g

SUBMITTER: Boulas I 

PROVIDER: S-EPMC10570042 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature