NDLI: Directionality and coordination of dehydration and ring formation during biosynthesis of the lantibiotic nisin.

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Directionality and coordination of dehydration and ring formation during biosynthesis of the lantibiotic nisin.

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Directionality and coordination of dehydration and ring formation during biosynthesis of the lantibiotic nisin.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lubelski, Jacek Khusainov, Rustem Kuipers, Oscar P.
Description	Author Affiliation: Lubelski J ( Molecular Genetics Department, University of Groningen and Kluyver Centre for Genomics of Industrial Fermentation, Kerklaan 30, 9751NN Haren, The Netherlands.)
Abstract	The lantibiotic nisin is a potent antimicrobial substance, which contains unusual lanthionine rings and dehydrated amino acid residues and is produced by Lactococcus lactis. Recently, the nisin biosynthetic machinery has been applied to introduce lanthionine rings in peptides other than nisin with potential therapeutic use. Due to difficulties in the isolation of the proposed synthetase complex (NisBTC), mechanistic information concerning the enzymatic biosynthesis of nisin is scarce. Here, we present the molecular characterization of a number of nisin mutants that affect ring formation. We have investigated in a systematic manner how these mutations influence dehydration events, which are performed enzymatically by the dehydratase NisB. Specific mutations that hampered ring formation allowed for the dehydration of serine residues that directly follow the rings and are normally unmodified. The combined information leads to the conclusion that 1) nisin biosynthesis is an organized directional process that starts at the N terminus of the molecule and continues toward the C terminus, and 2) NisB and NisC are alternating enzymes, whose activities follow one after another in a repetitive way. Thus, the dehydration and cyclization processes are not separated in time and space. On the basis of these results and previous knowledge, a working model for the sequence of events in the maturation of nisin is proposed.
ISSN	00219258
e-ISSN	1083351X
Journal	Journal of Biological Chemistry
Issue Number	38
Volume Number	284
Language	English
Publisher	American Society for Biochemistry and Molecular Biology (United States)
Publisher Date	2009-09-18
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Anti-Bacterial Agents Biosynthesis Bacterial Proteins Metabolism Lactococcus Lactis Membrane Proteins Multienzyme Complexes Nisin Peptide Biosynthesis, Nucleic Acid-Independent Physiology Alanine Analogs & Derivatives Chemistry Genetics Sulfides Research Support, Non-U.S. Gov't Biochemistry Molecular Biology
Content Type	Text
Resource Type	Article
Subject	Cell Biology Biochemistry Molecular Biology

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