4jgi

1.5 Angstrom crystal structure of a novel cobalamin-binding protein from Desulfitobacterium hafniense DCB-2

spinqualitylabelsall models 4jgi, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4jgi is a 2 chain structure with sequence from Desulfitobacterium hafniense. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.5Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8RPG0_DESHA Publication Abstract from PubMed This study describes the identification and the structural and spectroscopic analysis of a cobalamin-binding protein (termed CobDH) implicated in O-demethylation by the organohalide-respiring bacterium Desulfitobacterium hafniense DCB-2. The 1.5 A resolution crystal structure of CobDH is presented in the cobalamin-bound state and reveals that the protein is composed of an N-terminal helix-bundle domain and a C-terminal Rossmann-fold domain, with the cobalamin coordinated in the base-off/His-on conformation similar to other cobalamin-binding domains that catalyse methyl-transfer reactions. EPR spectroscopy of CobDH confirms cobalamin binding and reveals the presence of a cob(III)alamin superoxide, indicating binding of oxygen to the fully oxidized cofactor. These data provide the first structural insights into the methyltransferase reactions that occur during O-demethylation by D. hafniense. Structure of the cobalamin-binding protein of a putative O-demethylase from Desulfitobacterium hafniense DCB-2.,Sjuts H, Dunstan MS, Fisher K, Leys D Acta Crystallogr D Biol Crystallogr. 2013 Aug;69(Pt 8):1609-16. doi:, 10.1107/S0907444913011323. Epub 2013 Jul 20. PMID:23897483 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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