2hu9 | pdb_00002hu9

X-ray structure of the Archaeoglobus fulgidus CopZ N-terminal Domain

spinqualitylabelsall models 2hu9, resolution 1.78Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2hu9 is a 2 chain structure with sequence from Archaeoglobus fulgidus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.78Å Ligands: ACY, FES, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function COPZ_ARCFU Chaperone that serves for the intracellular sequestration and transport of Cu(+). Delivers Cu(+) directly to the transmembrane transport sites of copper-exporting P-type ATPase A (CopA). Probably has a redox function due to the presence of a 2Fe-2S cluster and could reduce Cu(2+) to Cu(+). 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 Bacterial CopZ proteins deliver copper to P1B-type Cu+-ATPases that are homologous to the human Wilson and Menkes disease proteins. The genome of the hyperthermophile Archaeoglobus fulgidus encodes a putative CopZ copper chaperone that contains an unusual cysteine-rich N-terminal domain of 130 amino acids in addition to a C-terminal copper binding domain with a conserved CXXC motif. The N-terminal domain (CopZ-NT) is homologous to proteins found only in extremophiles and is the only such protein that is fused to a copper chaperone. Surprisingly, optical, electron paramagnetic resonance, and x-ray absorption spectroscopic data indicate the presence of a [2Fe-2S] cluster in CopZ-NT. The intact CopZ protein binds two copper ions, one in each domain. The 1.8 A resolution crystal structure of CopZ-NT reveals that the [2Fe-2S] cluster is housed within a novel fold and that the protein also binds a zinc ion at a four-cysteine site. CopZ can deliver Cu+ to the A. fulgidus CopA N-terminal metal binding domain and is capable of reducing Cu2+ to Cu+. This unique fusion of a redox-active domain with a CXXC-containing copper chaperone domain is relevant to the evolution of copper homeostatic mechanisms and suggests new models for copper trafficking. Characterization and structure of a Zn2+ and [2Fe-2S]-containing copper chaperone from Archaeoglobus fulgidus.,Sazinsky MH, LeMoine B, Orofino M, Davydov R, Bencze KZ, Stemmler TL, Hoffman BM, Arguello JM, Rosenzweig AC J Biol Chem. 2007 Aug 31;282(35):25950-9. Epub 2007 Jul 3. PMID:17609202 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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