5kag

Crystal structure of a dioxygenase in the Crotonase superfamily in P21

spinqualitylabelsall models 5kag, resolution 2.46Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5kag is a 12 chain structure with sequence from "streptomyces_toyocaensis"_nishimura_et_al. "streptomyces toyocaensis" nishimura et al.. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: OXY, YE1 Related: 2np9, 5kaj, 5kah Gene: BU52_01220 ("Streptomyces toyocaensis" Nishimura et al.) Activity: Oxidoreductase, with EC number 1.13.11.80 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [DPGC_STRTO] Involved in the biosynthesis of the nonproteinogenic amino acid monomer (S)-3,5-dihydroxyphenylglycine (Dpg) responsible of the production of vancomycin and teicoplanin antibiotics. Catalyzes the unusual conversion 3,5-dihydroxyphenylacetyl-CoA (DPA-CoA) to 3,5-dihydroxyphenylglyoxylate. DpgC performed a net four-electron oxidation of the benzylic carbon of DPA-CoA and the hydrolysis of the thioester bond to generate free CoA (PubMed:18004875, PubMed:17507985). DpgC has the ability to process a diverse range of substituted phenylacetyl-CoA substrates (PubMed:18004875). Publication Abstract from PubMed The enzyme DpgC is included in the small family of cofactor-independent dioxygenases. The chemistry of DpgC is uncommon as the protein binds and utilizes dioxygen without the aid of a metal or organic cofactor. Previous structural and biochemical studies identified the substrate-binding mode and the components of the active site that are important in the catalytic mechanism. In addition, the results delineated a putative binding pocket and migration pathway for the co-substrate dioxygen. Here, structural biology is utilized, along with site-directed mutagenesis, to probe the assigned dioxygen-binding pocket. The key residues implicated in dioxygen trafficking were studied to probe the process of binding, activation and chemistry. The results support the proposed chemistry and provide insight into the general mechanism of dioxygen binding and activation. Probing the structural basis of oxygen binding in a cofactor-independent dioxygenase.,Li K, Fielding EN, Condurso HL, Bruner SD Acta Crystallogr D Struct Biol. 2017 Jul 1;73(Pt 7):573-580. doi:, 10.1107/S2059798317007045. Epub 2017 Jun 30. PMID:28695857 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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