Independent Control of Replication Initiation of the Two Vibrio Cholerae Chromosomes by DnaA and RctB

Overview

Journal J Bacteriol

Publisher American Society for Microbiology

Specialty Microbiology

Date 2006 Aug 23

PMID 16923911

Citations 46

Authors

Stephane Duigou

Kristine G Knudsen

Ole Skovgaard

Elizabeth S Egan

Anders Lobner-Olesen

Matthew K Waldor

Affiliations

Soon will be listed here.

Abstract

Although the two Vibrio cholerae chromosomes initiate replication in a coordinated fashion, we show here that each chromosome appears to have a specific replication initiator. DnaA overproduction promoted overinitiation of chromosome I and not chromosome II. In contrast, overproduction of RctB, a protein that binds to the origin of replication of chromosome II, promoted overinitiation of chromosome II and not chromosome I.

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The dimerization interface of initiator RctB governs chaperone and enhancer dependence of Vibrio cholerae chromosome 2 replication.

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