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. 1976 May;126(2):869–882. doi: 10.1128/jb.126.2.869-882.1976

Ultrastructure of the cell walls of two closely related clostridia that possess different regular arrays of surface subunits.

U B Sleytr, A M Glauert
PMCID: PMC233224  PMID: 1262317

Abstract

Cell walls of Clostridium thermohydrosulfuricum and C. thermosaccharolyticum have a two-layered structure, consisting of a thin, lysozyme-sensitive murein layer and a surface (S) layer composed of hexagonally or tetragonally arranged subunits. The subunits can be removed from the murein layer by treatment of cell wall preparations, are composed of a fragile, pH-sensitive monolayer of macromolecular subunits. In both organisms the first stage of the cell division process involves only the plasma membrane and the murein layer. During the subsequent cell separation, a surplus of S-layer subunits appears at the site of division, and consequently the newly formed cell poles remain completely covered by the s layer throughout the separation process. In autolyzed cells an additional layer of subunits assembles on extended areas of the inside of the mucopeptide layer. These observations indicate that the biological function of the S layer depends on its ability to maintain a complete covering of the cell surface at all stages of cell growth and division.

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These references are in PubMed. This may not be the complete list of references from this article.

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