1ab1

SI FORM CRAMBIN

spinqualitylabelsall models 1ab1, resolution 0.89Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ab1 is a 1 chain structure with sequence from Crambe hispanica subsp. abyssinica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: EOH Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [CRAM_CRAAB] The function of this hydrophobic plant seed protein is not known. 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 It is not agreed that correlated positions of disordered protein side chains (substate correlations) can be deduced from diffraction data. The pure Ser-22/Ile-25 (SI form) crambin crystal structure confirms correlations deduced for the natural, mixed sequence form of crambin crystals. Physical separation of the mixed form into pure SI form and Pro-22/Leu-25 (PL form) crambin and the PL form crystal structure determination (Yamano, A., and Teeter, M. M. (1994) J. Biol. Chem. 269, 13956-13965) support the proposed (Teeter, M. M., Roe, S. M., and Heo, N. H. (1993) J. Mol. Biol. 230, 292-311) correlation model. Electron density of mixed form crambin crystals shows four possible pairs of side chain conformations for heterogeneous residue 22 and nearby Tyr-29 (2(2) = 4, two conformations for each of two side chains). One combination can be eliminated because of short van der Waals' contacts. However, only two alternates have been postulated to exist in mixed form crambin: Pro-22/Tyr-29A and Ser-22/Tyr-29B. In crystals of the PL form, Pro-22 and Tyr-29A are found to be in direct van der Waals' contact (Yamano, A., and Teeter, M. M. (1994) J. Biol. Chem. 269, 13956-13965). Comparison of the SI form structure with the mixed form electron density confirms that the fourth combination of side chains does not occur and that side chain correlations are mediated by water networks. Crystal structure of Ser-22/Ile-25 form crambin confirms solvent, side chain substate correlations.,Yamano A, Heo NH, Teeter MM J Biol Chem. 1997 Apr 11;272(15):9597-600. PMID:9092482 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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