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Publication Abstract from PubMed

The bottromycins are a family of highly modified peptide natural products displaying potent antimicrobial activity against Gram-positive bacteria including methicillin-resistant Staphyloccoccus aureus. Bottromycins have recently been shown to be ribosomally synthesized and post-translationally modified peptides (RiPPs). Uniquely amongst RiPPs the precursor peptide BotA contains a C-terminal follower, rather than the canonical N- terminal leader sequence. We report the structural and biochemical characterization of BotP, a leucyl-aminopeptidase like enzyme from the bottromycin pathway. We demonstrate that BotP is responsible for the removal of the N-terminal methionine from the precursor peptide. The crystal structures of apo BotP and of BotP in complex with Mn2+ allowed us to model a BotP/substrate complex and to rationalize substrate recognition. Our data represent the first step towards targeted compound modification to unlock the full antibiotic potential of bottromycin.

Structure and substrate recognition of the Bottromycin maturation enzyme BotP.,Mann G, Huo L, Adam S, Nardone B, Vendome J, Westwood NJ, Muller R, Koehnke J Chembiochem. 2016 Sep 21. doi: 10.1002/cbic.201600406. PMID:27653442^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.