8sy2

Peanut USP-type BURP Domain Peptide Cyclase

spinqualitylabelsall models 8sy2, resolution 2.67Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8sy2 is a 2 chain structure with sequence from Arachis hypogaea. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.67Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The biosynthetic dogma of ribosomally synthesized and posttranslationally modified peptides (RiPP) involves enzymatic intermolecular modification of core peptide motifs in precursor peptides. The plant-specific BURP-domain protein family, named after their four founding members, includes autocatalytic peptide cyclases involved in the biosynthesis of side-chain-macrocyclic plant RiPPs. Here we show that AhyBURP, a representative of the founding Unknown Seed Protein-type BURP-domain subfamily, catalyzes intramolecular macrocyclizations of its core peptide during the sequential biosynthesis of monocyclic lyciumin I via glycine-tryptophan crosslinking and bicyclic legumenin via glutamine-tyrosine crosslinking. X-ray crystallography of AhyBURP reveals the BURP-domain fold with two type II copper centers derived from a conserved stapled-disulfide and His motif. We show the macrocyclization of lyciumin-C(sp(3))-N-bond formation followed by legumenin-C(sp(3))-O-bond formation requires dioxygen and radical involvement based on enzyme assays in anoxic conditions and isotopic labeling. Our study expands enzymatic intramolecular modifications beyond catalytic moiety and chromophore biogenesis to RiPP biosynthesis. An intramolecular macrocyclase in plant ribosomal peptide biosynthesis.,Mydy LS, Hungerford J, Chigumba DN, Konwerski JR, Jantzi SC, Wang D, Smith JL, Kersten RD Nat Chem Biol. 2024 Apr;20(4):530-540. doi: 10.1038/s41589-024-01552-1. Epub 2024 , Feb 14. PMID:38355722 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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