3u2y | pdb_00003u2y

ATP synthase c10 ring in proton-unlocked conformation at pH 6.1

spinqualitylabelsall models 3u2y, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3u2y is a 5 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: FME Related: 2xok, 2xqu, 2x2v, 2wgm, 3u2f, 3u32 Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The proton pore of the F(1)F(o) ATP synthase consists of a ring of c subunits, which rotates, driven by downhill proton diffusion across the membrane. An essential carboxylate side chain in each subunit provides a proton-binding site. In all the structures of c-rings reported to date, these sites are in a closed, ion-locked state. Structures are here presented of the c(10) ring from Saccharomyces cerevisiae determined at pH 8.3, 6.1 and 5.5, at resolutions of 2.0 A, 2.5 A and 2.0 A, respectively. The overall structure of this mitochondrial c-ring is similar to known homologs, except that the essential carboxylate, Glu59, adopts an open extended conformation. Molecular dynamics simulations reveal that opening of the essential carboxylate is a consequence of the amphiphilic nature of the crystallization buffer. We propose that this new structure represents the functionally open form of the c subunit, which facilitates proton loading and release. Structure of the c(10) ring of the yeast mitochondrial ATP synthase in the open conformation.,Symersky J, Pagadala V, Osowski D, Krah A, Meier T, Faraldo-Gomez JD, Mueller DM Nat Struct Mol Biol. 2012 Apr 15;19(5):485-91. doi: 10.1038/nsmb.2284. PMID:22504883 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also ATP synthase ATPase

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