2hc8

Structure of the A. fulgidus CopA A-domain

spinqualitylabelsall models 2hc8, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2hc8 is a 1 chain structure with sequence from Arcfl. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [COPA_ARCFU] Probably involved in copper and silver export. 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 Copper homeostasis is maintained in part by membrane-bound P(1B)-type ATPases that are found in all organisms and drive the transport of this essential, yet toxic, metal ion across cellular membranes. CopA from Archaeoglobus fulgidus is a hyperthermophilic member of this ATPase subfamily and is homologous to the human Wilson and Menkes disease ATPases. To gain insight into Cu(+)-ATPase function, the structure of the CopA actuator domain (A-domain) was determined to 1.65 A resolution. The CopA A-domain functions to couple ATP hydrolysis in the ATP binding domain (ATPBD) with structural rearrangements of critical transmembrane segments. Its fold is quite similar to that of the sarcoplasmic reticulum Ca(2+)-ATPase (SERCA1) A-domain, with the exception of an external loop region. On the basis of sequence and structural comparisons, specific residues that probably interact with the CopA ATPBD have been identified. Comparisons to the Wilson and Menkes disease A-domains reveal the presence of an additional loop that may be associated with regulatory functions in eukaryotic Cu(+)-ATPases. Finally, several mutations in the Wilson and Menkes disease ATPases occur in the A-domain, and their likely effects on function can be inferred from the CopA A-domain structure. Structure of the actuator domain from the Archaeoglobus fulgidus Cu(+)-ATPase.,Sazinsky MH, Agarwal S, Arguello JM, Rosenzweig AC Biochemistry. 2006 Aug 22;45(33):9949-55. PMID:16906753 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also ATPase

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