Properties of RecA441 Protein Reveal a Possible Role for RecF and SSB Proteins in Escherichia Coli

Overview

Journal Mol Gen Genet

Specialties Genetics
Molecular Biology

Date 1991 Jul 1

PMID 1830922

Citations 3

Authors

A M Dri

P L Moreau

Affiliations

Soon will be listed here.

Abstract

We examined the possibility that the recA441 mutation, which partially suppresses the UV sensitivity of uvr recF mutant bacteria, exerts its effect by coding for an altered RecA protein that competes more efficiently than the RecA+ protein with SSB for ssDNA in vivo. Using an assay measuring recombination between UV-damaged lambda DNA and intact homologous DNA, we found that the introduction of the recA441 mutation partially suppressed the defects in recombination in bacteria lacking RecF activity but not in bacteria with excess SSB, although recombination was affected more in recF mutants than in bacteria overproducing SSB. These results therefore do not support the hypothesis that RecA441 protein, or RecA protein with the help of RecF protein, is required during recombination of UV-damaged DNA to compete with SSB for ssDNA.

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