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Mol Microbiol. 2006 Jul;61(2):277-84.

Promiscuity in multidrug recognition and transport: the bacterial MFS Mdr transporters.

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1
Department of Biological Chemistry, Weizmann Institute of Science, Rehovot, 76100, Israel.

Abstract

Multidrug (Mdr) transport is an obstacle to the successful treatment of cancer and infectious diseases, and it is mediated by Mdr transporters that recognize and export an unusually broad spectrum of chemically dissimilar toxic compounds. Therefore, in addition to its clinical significance, the Mdr transport phenomenon presents intriguing and challenging mechanistic queries. Recent studies of secondary Mdr transporters of the major facilitator superfamily (MFS) have revealed that they are promiscuous not only regarding their substrate recognition profile, but also with respect to matters of energy utilization, electrical and chemical flexibility in the Mdr recognition pocket, and surprisingly, also in their physiological functions.

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