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EMBO Rep. 2004 Oct;5(10):983-8. Epub 2004 Sep 17.

The DNA repair helicase UvrD is essential for replication fork reversal in replication mutants.

Author information

1
Laboratoire de Génétique Microbienne, Institut National de la Recherche Agronomique, 78352 Jouy en Josas, France.

Abstract

Replication forks arrested by inactivation of the main Escherichia coli DNA polymerase (polymerase III) are reversed by the annealing of newly synthesized leading- and lagging-strand ends. Reversed forks are reset by the action of RecBC on the DNA double-strand end, and in the absence of RecBC chromosomes are linearized by the Holliday junction resolvase RuvABC. We report here that the UvrD helicase is essential for RuvABC-dependent chromosome linearization in E. coli polymerase III mutants, whereas its partners in DNA repair (UvrA/B and MutL/S) are not. We conclude that UvrD participates in replication fork reversal in E. coli.

PMID:
15375374
PMCID:
PMC1299159
DOI:
10.1038/sj.embor.7400262
[Indexed for MEDLINE]
Free PMC Article

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