Open AccessAccumulation of a murein-membrane attachment site fraction when cell division is blocked in lkyD and cha mutants of Salmonella typhimurium and Escherichia coli
Author(s) -
Anuradha Chakraborti,
Kohei Ishidate,
William R. Cook,
J Zrike,
Lawrence Rothfield
Publication year - 1986
Publication title -
journal of bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.652
H-Index - 246
eISSN - 1067-8832
pISSN - 0021-9193
DOI - 10.1128/jb.168.3.1422-1429.1986
Subject(s) - biology , cell envelope , bacterial outer membrane , inner membrane , escherichia coli , mutant , cell division , salmonella , cell fractionation , membrane , microbiology and biotechnology , cell membrane , biochemistry , enterobacteriaceae , cell , bacteria , genetics , gene
Membrane fractionation studies were performed on Salmonella typhimurium lkyD(Ts) and E. coli cha(Ts) mutants that appeared to be blocked at a late stage of the cell division cycle. In both cases growth of the mutant strains at nonpermissive temperatures was associated with accumulation of a characteristic cell envelope fraction (fraction OML) that contained inner membrane, murein, and outer membrane components. The isolated fraction corresponded in composition and bouyant density to a fraction from wild-type strains that had previously been suggested (M. H. Bayer, G. P. Costello, and M. E. Bayer, J. Bacteriol. 149:758-767, 1982; K. Ishidate, E. S. Creeger, J. Zrike, S. Deb, B. Glauner, T. J. MacAlister, and L. I. Rothfield, J. Biol. Chem. 261:428-443, 1986) to contain adhesion sites between inner membrane, murein, and outer membrane. The accumulation of OML in LkyD- and Cha- cells was prevented by treatments that blocked DNA synthesis. The effects of interference with DNA synthesis did not appear to involve the SOS response.