2xsm

Crystal structure of the mammalian cytosolic chaperonin CCT in complex with tubulin

spinqualitylabelsall models 2xsm, resolution 5.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2xsm is a 16 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: UNK Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed Protein folding is assisted by molecular chaperones. CCT (chaperonin containing TCP-1, or TRiC) is a 1-MDa oligomer that is built by two rings comprising eight different 60-kDa subunits. This chaperonin regulates the folding of important proteins including actin, alpha-tubulin and beta-tubulin. We used an electron density map at 5.5 A resolution to reconstruct CCT, which showed a substrate in the inner cavities of both rings. Here we present the crystal structure of the open conformation of this nanomachine in complex with tubulin, providing information about the mechanism by which it aids tubulin folding. The structure showed that the substrate interacts with loops in the apical and equatorial domains of CCT. The organization of the ATP-binding pockets suggests that the substrate is stretched inside the cavity. Our data provide the basis for understanding the function of this chaperonin. Crystal structure of the open conformation of the mammalian chaperonin CCT in complex with tubulin.,Munoz IG, Yebenes H, Zhou M, Mesa P, Serna M, Park AY, Bragado-Nilsson E, Beloso A, de Carcer G, Malumbres M, Robinson CV, Valpuesta JM, Montoya G Nat Struct Mol Biol. 2010 Dec 12. PMID:21151115 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Chaperonin

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