Autoradiographic analysis of diaminopimelic acid incorporation in filamentous cells of Escherichia coli: repression of peptidoglycan synthesis around the nucleoid

Author:

Mulder E1,Woldringh C L1

Affiliation:

1. Department of Molecular Cell Biology, University of Amsterdam, The Netherlands.

Abstract

Peptidoglycan synthesis rate in nonconstricting filaments of Escherichia coli dnaX(Ts) has been studied by autoradiography of incorporated [3H]diaminopimelic acid. Analysis of autoradiograms of whole cells and sacculi showed that peptidoglycan is synthesized at a reduced rate in the nucleoid-containing parts of these filaments. The lower rate of peptidoglycan synthesis in the cell center coincides with a higher local rate of protein synthesis. DNA-less cell formation in dnaX(Ts), dnaX(Ts) sfiA, and the minB minicell-forming mutant is accompanied by a local increase in peptidoglycan synthesis at the constriction site.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

Reference19 articles.

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2. Par D: a new gene coding for a protein required for chromosome partitioning and septum localization in Escherichia coli;Hussain K.;Mol. Microbiol.,1987

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