2klr

Solid-state NMR structure of the alpha-crystallin domain in alphaB-crystallin oligomers

spinqualitylabelsall models 2klr, 10 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2klr is a 2 chain structure with sequence from Homo sapiens. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: CRYAB, CRYA2 (Homo sapiens) Resources: FirstGlance, OCA, RCSB, PDBsum Disease [CRYAB_HUMAN] Posterior polar cataract;Alpha-crystallinopathy;Zonular cataract;Familial isolated dilated cardiomyopathy;Fatal infantile hypertonic myofibrillar myopathy. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. The disease is caused by mutations affecting the gene represented in this entry. Function [CRYAB_HUMAN] May contribute to the transparency and refractive index of the lens. Has chaperone-like activity, preventing aggregation of various proteins under a wide range of stress conditions. 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 small heat shock protein alphaB-crystallin (alphaB) contributes to cellular protection against stress. For decades, high-resolution structural studies on oligomeric alphaB have been confounded by its polydisperse nature. Here, we present a structural basis of oligomer assembly and activation of the chaperone using solid-state NMR and small-angle X-ray scattering (SAXS). The basic building block is a curved dimer, with an angle of approximately 121 degrees between the planes of the beta-sandwich formed by alpha-crystallin domains. The highly conserved IXI motif covers a substrate binding site at pH 7.5. We observe a pH-dependent modulation of the interaction of the IXI motif with beta4 and beta8, consistent with a pH-dependent regulation of the chaperone function. N-terminal region residues Ser59-Trp60-Phe61 are involved in intermolecular interaction with beta3. Intermolecular restraints from NMR and volumetric restraints from SAXS were combined to calculate a model of a 24-subunit alphaB oligomer with tetrahedral symmetry. Solid-state NMR and SAXS studies provide a structural basis for the activation of alphaB-crystallin oligomers.,Jehle S, Rajagopal P, Bardiaux B, Markovic S, Kuhne R, Stout JR, Higman VA, Klevit RE, van Rossum BJ, Oschkinat H Nat Struct Mol Biol. 2010 Sep;17(9):1037-42. Epub 2010 Aug 29. PMID:20802487 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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