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Science 3 January 1986:
Vol. 231. no. 4733, pp. 48 - 51
DOI: 10.1126/science.3941890
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Articles

Science, Vol 231, Issue 4733, 48-51
Copyright © 1986 by American Association for the Advancement of Science

articles

Osmotic adaptation by gram-negative bacteria: possible role for periplasmic oligosaccharides

KJ Miller, EP Kennedy, and VN Reinhold

The cyclic (1----2)-beta-D-glucans produced by species of Agrobacterium and Rhizobium resemble the membrane-derived oligosaccharides of Escherichia coli in their periplasmic localization, intermediate size, and (1----2)-beta-D-glucan backbones. The regulation of the biosynthesis of cyclic (1----2)-beta-D-glucan by Agrobacterium tumefaciens is now shown to parallel the osmotic regulation of membrane-derived oligosaccharide biosynthesis in Escherichia coli. This result suggests a general role for periplasmic oligosaccharides in the osmotic adaptation of Gram-negative bacteria as ecologically diverse as enteric and soil bacteria.


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