Structure of the regular surface layer of Sporosarcina ureae.

Journal of Bacteriology
M Stewart, T J Beveridge

Abstract

Optical diffraction and computer image processing of electron micrographs were employed to analyze the structure of the regular surface layer of Sporosarcina ureae at high resolution. Negatively stained preparations of regular surface layer fragments showed two types of tetragonal pattern, each having p4 symmetry in projection with a = 12.8 nm. Although the two patterns differed greatly in overall appearance, both had a common pattern of areas of high stain density which we interpret as arising from gaps or holes in the structure. We speculate that these holes may be related to a protective role of the regular surface layer, whereby hostile environmental agents (such as muramidases) larger than about 2 nm would be screened from the underlying layers of the bacterial surface, while the free passage of nutrients and waste products into and out of the cell would still be allowed.

References

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Citations

Jul 1, 1991·Journal of Electron Microscopy Technique·J P SchroeterM A Goldstein
Aug 1, 1988·Journal of Electron Microscopy Technique
Jan 1, 1996·Progress in Biophysics and Molecular Biology·M Sára, U B Sleytr
Apr 1, 1997·Microbiology·Maan Singh Sidhu, Ingar Olsen
Apr 1, 1982·Journal of Bacteriology·M Stewart, R G Murray
May 1, 1982·Journal of Bacteriology·M Kessel, Y Cohen
Dec 1, 1989·Journal of Bacteriology·M D Luckevich, T J Beveridge
Oct 1, 1986·Journal of Bacteriology·J LepaultK Leonard
Oct 1, 1986·Journal of Bacteriology·H EngelhardtW Baumeister
Sep 1, 1987·Journal of Bacteriology·M Sára, U B Sleytr
Oct 1, 1986·Journal of Ultrastructure and Molecular Structure Research·P MessnerU B Sleytr
May 15, 1983·Journal of Molecular Biology·B F McEwenS J Edelstein

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