Structural Basis for the Variation in Triclosan Affinity to Enoyl Reductases

Pidugu, Lakshmi Swarnamukhi and Kapoor, Mili and Surolia, Namita and Surolia, Avadhesha and Suguna, Kaza (2004) Structural Basis for the Variation in Triclosan Affinity to Enoyl Reductases. In: Journal of Molecular Biology, 343 (1). pp. 147-155.

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Abstract

Bacteria synthesize fatty acids in a dissociated type pathway different from that in humans. Enoyl acyl carrier protein reductase, which catalyzes the final step of fatty acid elongation, has been validated as a potential antimicrobial drug target. Triclosan is known to inhibit this enzyme effectively. Precise characterization of the mode of triclosan binding is required to develop highly specific inhibitors. With this in view, interactions between triclosan, the cofactor $NADH/NAD^+$ and the enzyme from five different species, one plant and four of microbial origin, have been examined in the available crystal structures. A comparison of these structures shows major structural differences at the substrate/inhibitor/cofactor-binding loop. The analysis reveals that the conformation of this flexible loop and the binding affinities of triclosan to each of these enzymes are strongly correlated.

Item Type:	Journal Article
Publication:	Journal of Molecular Biology
Publisher:	Elsevier
Additional Information:	The copyright of this article belongs to Elsevier.
Keywords:	Triclosan;Enoyl-ACP reductase;FAS-II;Structural comparison;NADH
Department/Centre:	Division of Biological Sciences > Molecular Biophysics Unit
Date Deposited:	10 Apr 2006
Last Modified:	19 Sep 2010 04:25
URI:	http://eprints.iisc.ac.in/id/eprint/6202

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