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LuxS-mediated quorum sensing in Borrelia burgdorferi, the lyme disease spirochete.

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By Stevenson B, Babb K • www.ProHealth.com • August 1, 2002


Abstract

The establishment of Borrelia burgdorferi infection involves numerous interactions between the bacteria and a variety of vertebrate host and arthropod vector tissues. This complex process requires regulated synthesis of many bacterial proteins. We now demonstrate that these spirochetes utilize a LuxS/autoinducer-2 (AI-2)-based quorum-sensing mechanism to regulate protein expression, the first system of cell-cell communication to be described in a spirochete. The luxS gene of B. burgdorferi was identified and demonstrated to encode a functional enzyme by complementation of an Escherichia coli luxS mutant. Cultured B. burgdorferi responded to AI-2 by altering the expression levels of a large number of proteins, including the complement regulator factor H-binding Erp proteins. Through this mechanism, a population of Lyme disease spirochetes may synchronize production of specific proteins needed for infection processes.

Infect Immun. 2002 Aug;70(8):4099-105. Research Support, U.S. Gov't, P.H.S.





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