Current Opinion in Microbiology 2011-04-01

Detection of acyl-homoserine lactones by Escherichia and Salmonella.

Jitesh A Soares, Brian M M Ahmer

文献索引：Curr. Opin. Microbiol. 14 , 188-193, (2011)

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摘要

Escherichia and Salmonella do not synthesize quorum-sensing signaling molecules of the N-acyl-l-homoserine lactone (AHL) type but they can detect AHLs produced by other species of bacteria. AHLs are present in the bovine rumen but not in the remainder of the gastrointestinal tract. Enterohemorrhagic E. coli (EHEC) responds to AHLs extracted from the bovine rumen. Salmonella fails to detect AHLs in the gastrointestinal tracts of pathogen-free mice or pigs, suggesting that AHLs are not present. However, Salmonella does detect the AHL production of Yersinia enterocolitica in mouse Peyer's patches. In response to AHLs, EHEC represses flagellar genes and the LEE pathogenicity island while it activates the acid fitness island, whereas Salmonella activates the rck operon and a gene, srgE, encoding a putative Type III secreted effector.Copyright © 2011 Elsevier Ltd. All rights reserved.

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