2cpo | pdb_00002cpo

CHLOROPEROXIDASE

spinqualitylabelsall models 2cpo, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2cpo is a 1 chain structure with sequence from Leptoxyphium fumago. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HEM, MAN, MN, NAG NonStd Res: PCA Activity: Chloride peroxidase, with EC number 1.11.1.10 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PRXC_CALFU] Catalyzes peroxidative halogenations involved in the biosynthesis of clardariomycin (2,2-dichloro-1,3-cyclo-pentenedione). The enzyme also has potent catalase activity and in the absence of halide ion, acts as a peroxidase similar to plant peroxidases. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed BACKGROUND: Chloroperoxidase (CPO) is a versatile heme-containing enzyme that exhibits peroxidase, catalase and cytochrome P450-like activities in addition to catalyzing halogenation reactions. The structure determination of CPO was undertaken to help elucidate those structural features that enable the enzyme to exhibit these multiple activities. RESULTS: Despite functional similarities with other heme enzymes, CPO folds into a novel tertiary structure dominated by eight helical segments. The catalytic base, required to cleave the peroxide O-O bond, is glutamic acid rather than histidine as in other peroxidases. CPO contains a hydrophobic patch above the heme that could be the binding site for substrates that undergo P450-like reactions. The crystal structure also shows extensive glycosylation with both N- and O-linked glycosyl chains. CONCLUSIONS: The proximal side of the heme in CPO resembles cytochrome P450 because a cysteine residue serves as an axial heme ligand, whereas the distal side of the heme is 'peroxidase-like' in that polar residues form the peroxide-binding site. Access to the heme pocket is restricted to the distal face such that small organic substrates can interact with the iron-linked oxygen atom which accounts for the P450-like reactions catalyzed by chloroperoxidase. The crystal structure of chloroperoxidase: a heme peroxidase--cytochrome P450 functional hybrid.,Sundaramoorthy M, Terner J, Poulos TL Structure. 1995 Dec 15;3(12):1367-77. PMID:8747463 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Haloperoxidase

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