2b8e

CopA ATP Binding Domain

spinqualitylabelsall models 2b8e, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2b8e is a 3 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 2.3Å Ligands: MSE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 The P-type ATPases translocate cations across membranes using the energy provided by ATP hydrolysis. CopA from Archaeoglobus fulgidus is a hyperthermophilic ATPase responsible for the cellular export of Cu+ and is a member of the heavy metal P1B-type ATPase subfamily, which includes the related Wilson and Menkes diseases proteins. The Cu+-ATPases are distinct from their P-type counter-parts in ion binding sequences, membrane topology, and the presence of cytoplasmic metal binding domains, suggesting that they employ alternate forms of regulation and novel mechanisms of ion transport. To gain insight into Cu+-ATPase function, the structure of the CopA ATP binding domain (ATPBD) was determined to 2.3 A resolution. Similar to other P-type ATPases, the ATPBD includes nucleotide binding (N-domain) and phosphorylation (P-domain) domains. The ATPBD adopts a closed conformation similar to the nucleotide-bound forms of the Ca2+-ATPase. The CopA ATPBD is much smaller and more compact, however, revealing the minimal elements required for ATP binding, hydrolysis, and enzyme phosphorylation. Structural comparisons to the AMP-PMP-bound form of the Escherichia coli K+-transporting Kdp-ATPase and to the Wilson disease protein N-domain indicate that the five conserved N-domain residues found in P1B-type ATPases, but not in the other families, most likely participate in ATP binding. By contrast, the P-domain includes several residues conserved among all P-type ATPases. Finally, the CopA ATPBD structure provides a basis for understanding the likely structural and functional effects of various mutations that lead to Wilson and Menkes diseases. Structure of the ATP binding domain from the Archaeoglobus fulgidus Cu+-ATPase.,Sazinsky MH, Mandal AK, Arguello JM, Rosenzweig AC J Biol Chem. 2006 Apr 21;281(16):11161-6. Epub 2006 Feb 22. PMID:16495228 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also ATPase 3D structures

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