PMID: 1201515Nov 1, 1975Paper

Fine structure of the cell envelope layers of Flexibacter polymorphus

Canadian Journal of Microbiology
H F RidgwayR A Lewin

Abstract

Electron microscopy of the filamentous gliding marine bacterium Flexibacter polymorphus demonstrated that the cell envelope consists of an electron-dense intermediate layer located between two unit-type membranes: an outer membrane, presumably of lipopolysaccharide, and an inner cytoplasmic membrane. Separation of living filaments into single cells by lysozyme suggests that a peptidoglycan moiety, possibly corresponding to the intermediate layer, might be situated between the two membranes. Cell division proceeds by invagination of the cytoplasmic membrane and intermediate layer forming a transverse septum. Cells generally fail to separate after the division process, so that a common outer membrane encloses all of the cells in a single filament. There is a continuous layer of macromolecular cup-shaped elements ('goblets') attached to the outermost surface of the lipopolysaccharide membrane. Tangential thin sections, as well as negatively stained preparations of envelope fragments (produced by sonication of autolyzed cells), showed that the goblets are arranged in a close-packed hexagonal array. The presence of electron-dense structures located between the outer and inner membranes, and exhibiting the same periodicity as the gob...Continue Reading

Citations

Jan 1, 1978·Current Microbiology·W R Strohl, J M Larkin
Jan 1, 1988·Cell Motility and the Cytoskeleton·H F Ridgway, R A Lewin
Feb 6, 2008·Molecular Microbiology·Gavin E MurphyGrant J Jensen
Sep 1, 2013·Mikrobiologiia·V N KhmeleninaIu A Trotsenko
Jan 1, 1978·Zeitschrift für allgemeine Mikrobiologie·R Haubold
May 1, 1995·Journal of Bacteriology·E Hoiczyk, W Baumeister
Nov 1, 1984·Journal of Bacteriology·R T IrvinJ W Costerton
Mar 1, 1979·Journal of Bacteriology·B Dayrell-Hart, R P Burchard
Nov 1, 1977·Journal of Bacteriology·A C BurchardJ A Kloetzel

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