1iby

RED COPPER PROTEIN NITROSOCYANIN FROM NITROSOMONAS EUROPAEA

spinqualitylabelsall models 1iby, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1iby is a 4 chain structure with sequence from Nitrosomonas europaea. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU, HEZ Related: 1ibz, 1ic0 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 Nitrosocyanin (NC) is a mononuclear red copper protein isolated from the ammonia oxidizing bacterium Nitrosomonas europaea. Although NC exhibits some sequence homology to classic blue copper proteins, its spectroscopic and electrochemical properties are drastically different. The 1.65 A resolution crystal structure of oxidized NC reveals an unprecedented trimer of single domain cupredoxins. Each copper center is partially covered by an unusual extended beta-hairpin structure from an adjacent monomer. The copper ion is coordinated by His 98, His 103, Cys 95, a single side chain oxygen of Glu 60, and a solvent molecule. In the 2.3 A resolution structure of reduced NC, His 98 shifts away from the copper ion, and the solvent molecule is not observed. The arrangement of these ligands renders the coordination geometry of the NC red copper center distinct from that of blue copper centers. In particular, the red copper center has a higher coordination number and lacks the long Cu-S(Met) and short Cu-S(Cys) bond distances characteristic of blue copper. Moreover, the red copper center is square pyramidal whereas blue copper is typically distorted tetrahedral. Analysis of the NC structure provides insight into possible functions of this new type of biological copper center. Crystal structure of a novel red copper protein from Nitrosomonas europaea.,Lieberman RL, Arciero DM, Hooper AB, Rosenzweig AC Biochemistry. 2001 May 15;40(19):5674-81. PMID:11341832 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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