Patel_2019_Nat.Commun_10_3868

Reference

Title : Structure of a bound peptide phosphonate reveals the mechanism of nocardicin bifunctional thioesterase epimerase-hydrolase half-reactions - Patel_2019_Nat.Commun_10_3868
Author(s) : Patel KD , d'Andrea FB , Gaudelli NM , Buller AR , Townsend CA , Gulick AM
Ref : Nat Commun , 10 :3868 , 2019
Abstract :

Nonribosomal peptide synthetases (NRPSs) underlie the biosynthesis of many natural products that have important medicinal utility. Protection of the NRPS peptide products from proteolysis is critical to these pathways and is often achieved by structural modification, principally the introduction of D-amino acid residues into the elongating peptide. These amino acids are generally formed in situ from their L-stereoisomers by epimerization domains or dual-function condensation/epimerization domains. In singular contrast, the thioesterase domain of nocardicin biosynthesis mediates both the effectively complete L- to D-epimerization of its C-terminal amino acid residue (>/=100:1) and hydrolytic product release. We report herein high-resolution crystal structures of the nocardicin thioesterase domain in ligand-free form and reacted with a structurally precise fluorophosphonate substrate mimic that identify the complete peptide binding pocket to accommodate both stereoisomers. These structures combined with additional functional studies provide detailed mechanistic insight into this unique dual-function NRPS domain.

PubMedSearch : Patel_2019_Nat.Commun_10_3868
PubMedID: 31455765
Gene_locus related to this paper: 9noca-q5j1q6

Related information

Inhibitor Fluorophosphonate-nocardicin-G
Gene_locus 9noca-q5j1q6
Structure 6OJC    6OJD

Citations formats

Patel KD, d'Andrea FB, Gaudelli NM, Buller AR, Townsend CA, Gulick AM (2019)
Structure of a bound peptide phosphonate reveals the mechanism of nocardicin bifunctional thioesterase epimerase-hydrolase half-reactions
Nat Commun 10 :3868

Patel KD, d'Andrea FB, Gaudelli NM, Buller AR, Townsend CA, Gulick AM (2019)
Nat Commun 10 :3868