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Nat Cell Biol. 2007 Sep;9(9):1098-100. Epub 2007 Aug 12.

A concentration-dependent switch in the bacterial response to temperature.

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1
Center for Studies in Physics and Biology, The Rockefeller University, New York, New York 10065, USA. salmanh@rockefeller.edu

Abstract

We observed that bacteria grown below a critical concentration, in batch-mode cultures, swim towards warm regions when subjected to a temperature gradient. Above that concentration, they swim towards colder regions. Our findings indicate that the secreted intercellular signal, glycine, mediates this switch through methylation of Tsr receptors. At high bacterial concentration, the switch is reinforced by an inversion of the Tar/Tsr expression ratio.

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PMID:
17694049
DOI:
10.1038/ncb1632
[Indexed for MEDLINE]
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