Central Role for the Escherichia Coli MinC Gene Product in Two Different Cell Division-inhibition Systems

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 1990 Feb 1

PMID 2137246

Citations 84

Authors

P A de Boer

R E Crossley

L I Rothfield

Affiliations

Soon will be listed here.

Abstract

In Escherichia coli, selection of the proper division site at midcell requires the specific inhibition of septation at two other potential division sites, located at each of the cell poles. This site-specific inhibition of septation is mediated by the gene products of the minicell locus (the minB operon) that includes three genes, minC, minD, and minE. In this paper we show that one of the components of this division-inhibition system, the minC gene product, is also an essential component of another division-inhibition system, which is induced by derepression of the dicB gene and leads to inhibition of septation at all potential division sites. The two minC-dependent division-inhibition systems could be functionally distinguished by their different responses to the minE gene product. The results suggest a model in which a common mechanism, mediated by MinC, is responsible for the division block in a class of division-inhibition systems that can be independently activated by different proteins that determine the specific properties of these systems.

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