3ixf | pdb_00003ixf

Crystal Structure of Dehaloperoxidase B at 1.58 and Structural Characterization of the AB Dimer from Amphitrite ornata

spinqualitylabelsall models 3ixf, resolution 1.58Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3ixf is a 2 chain structure with sequence from Amphitrite ornata. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HEM, OXY, SO4 Gene: dhpB (Amphitrite ornata) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 As members of the globin superfamily, dehaloperoxidase (DHP) isoenzymes A and B from the marine annelid Amphitrite ornata possess hemoglobin function, but they also exhibit a biologically relevant peroxidase activity that is capable of converting 2,4,6-trihalophenols to the corresponding 2,6-dihaloquinones in the presence of hydrogen peroxide. Here, a comprehensive structural study of recombinant DHP B, both by itself and cocrystallized with isoenzyme A, using X-ray diffraction is presented. The structure of DHP B refined to 1.58 A resolution exhibits the same distal histidine (His55) conformational flexibility as that observed in isoenzyme A, as well as additional changes to the distal and proximal hydrogen-bonding networks. Furthermore, preliminary characterization of the DHP AB heterodimer is presented, which exhibits differences in the AB interface that are not observed in the A-only or B-only homodimers. These structural investigations of DHP B provide insights that may relate to the mechanistic details of the H(2)O(2)-dependent oxidative dehalogenation reaction catalyzed by dehaloperoxidase, present a clearer description of the function of specific residues in DHP at the molecular level and lead to a better understanding of the paradigms of globin structure-function relationships. Structure of dehaloperoxidase B at 1.58 A resolution and structural characterization of the AB dimer from Amphitrite ornata.,de Serrano V, D'Antonio J, Franzen S, Ghiladi RA Acta Crystallogr D Biol Crystallogr. 2010 May;66(Pt 5):529-38. Epub 2010, Apr 21. PMID:20445228 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dehaloperoxidase

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