DNA methylation by three Type I restriction modification systems of Escherichia coli does not influence gene regulation of the host bacterium.

ABSTRACT: DNA methylation is a common epigenetic mark that influences transcriptional regulation, and therefore cellular phenotype, across all domains of life. In particular, both orphan methyltransferases and those from phasevariable restriction modification systems (RMSs) have been co-opted to regulate virulence epigenetically in many bacteria. We now show that three distinct non-phasevariable Type I RMSs in Escherichia coli have no measurable impact on gene expression, in vivo virulence, or any of 1190 in vitro growth phenotypes. We demonstrated this using both Type I RMS knockout mutants as well as heterologous installation of Type I RMSs into two E. coli strains. These data provide three clear and currently rare examples of restriction modification systems that have no impact on their host orga

SUBMITTER: Mehershahi KS 

PROVIDER: S-EPMC8287963 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature