Effect of paracrystalline protein surface layers on predation by Bdellovibrio bacteriovorus

J Bacteriol. 1991 Apr;173(7):2244-9. doi: 10.1128/jb.173.7.2244-2249.1991.


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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bdellovibrio / growth & development*
  • Bdellovibrio / ultrastructure
  • Gram-Negative Bacteria / physiology*
  • Microscopy, Electron