Effect of paracrystalline protein surface layers on predation by Bdellovibrio bacteriovorus

Author:

Koval S F1,Hynes S H1

Affiliation:

1. Department of Microbiology and Immunology, University of Western Ontario, London, Canada.

Abstract

We determined that paracrystalline protein surface arrays (S layers) protected gram-negative eubacteria from predation by Bdellovibrio bacteriovorus. Aquaspirillum serpens VHA and MW5 and Aquaspirillum sinuosum were resistant to predation by B. bacteriovorus 6-5-S when fully covered by their S layers. The S layer of Aeromonas salmonicida A449 protected the cells from predication by B. bacteriovorus 109J. A predacious, plaque-forming vibrio that lysed an S-layer- variant of Caulobacter crescentus but was not predacious on the parental strain which possessed an S layer was isolated from raw sewage. Since S layers are stable components of many bacterial surfaces in nature, they can provide this protective function in both aquatic and terrestrial habitats where Bdellovibrio spp. are found.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

Reference25 articles.

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5. Huang J. C.-C. and M. P. Starr. 1973. Effects of calcium and magnesium ions and host viability on growth of bdellovibrios. Antonie van Leeuwenhoek 39:151-167.

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