Publication Date:
2008-06-20
Description:
Quorum sensing is a term used to describe cell-to-cell communication that allows cell-density-dependent gene expression. Many bacteria use acyl-homoserine lactone (acyl-HSL) synthases to generate fatty acyl-HSL quorum-sensing signals, which function with signal receptors to control expression of specific genes. The fatty acyl group is derived from fatty acid biosynthesis and provides signal specificity, but the variety of signals is limited. Here we show that the photosynthetic bacterium Rhodopseudomonas palustris uses an acyl-HSL synthase to produce p-coumaroyl-HSL by using environmental p-coumaric acid rather than fatty acids from cellular pools. The bacterium has a signal receptor with homology to fatty acyl-HSL receptors that responds to p-coumaroyl-HSL to regulate global gene expression. We also found that p-coumaroyl-HSL is made by other bacteria including Bradyrhizobium sp. and Silicibacter pomeroyi. This discovery extends the range of possibilities for acyl-HSL quorum sensing and raises fundamental questions about quorum sensing within the context of environmental signalling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schaefer, Amy L -- Greenberg, E P -- Oliver, Colin M -- Oda, Yasuhiro -- Huang, Jean J -- Bittan-Banin, Gili -- Peres, Caroline M -- Schmidt, Silke -- Juhaszova, Katarina -- Sufrin, Janice R -- Harwood, Caroline S -- England -- Nature. 2008 Jul 31;454(7204):595-9. doi: 10.1038/nature07088. Epub 2008 Jun 18.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology, University of Washington, Washington 98195, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18563084" target="_blank"〉PubMed〈/a〉
Keywords:
4-Butyrolactone/*analogs & derivatives/chemistry/metabolism
;
Bacterial Proteins/genetics/isolation & purification/*metabolism
;
Base Sequence
;
Biological Assay
;
Coumaric Acids/*metabolism
;
Gene Expression Regulation, Bacterial
;
*Quorum Sensing
;
Regulon
;
Rhodopseudomonas/enzymology/genetics/*growth & development/*metabolism
;
Sequence Alignment
;
*Signal Transduction
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Permalink
