1e9p

Crystal structure of bovine Cu, Zn SOD to 1.7 Angstrom (3 of 3)

spinqualitylabelsall models 1e9p, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1e9p is a 2 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU, ZN Related: 1cb4, 1cbj, 1e9o, 1e9q, 1sxn, 1sxs, 1sxz, 2sod, 3sod, 1cob, 1sda, 1sxa, 1sxb, 1sxc Activity: Catechol 1,2-dioxygenase, with EC number 1.13.11.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [SODC_BOVIN] Destroys radicals which are normally produced within the cells and which are toxic to biological systems. 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 structure of the catalytic site in one subunit of bovine CuZn superoxide dismutase is shown to be highly variable. A series of crystal structures at approximately 1.7 A have been determined using data collected from different crystals. Several conformations are observed for the copper site from one of the subunits. These conformations lie between those expected for the Cu(II) and Cu(I) forms of the enzyme and may represent a slow positional rearrangement of the Cu site during the crystallisation process due to the presence of a trace reductant in the mother liquor. These states perhaps indicate some functionally relevant structural steps that ultimately result in the breakage of the imidazolate bridge between the two metal sites.This behaviour is not observed for the second subunit of the dimeric enzyme, which remains in the five-coordinate, distorted square planar geometry in all cases. We suggest that this asymmetric behaviour may be caused by the lack of mobility for the Glu119-Leu142 loop region in the second subunit caused by crystal contacts. This region forms one wall of the active-site cavity, and its mobility has been suggested, via molecular dynamics studies, to be important for the catalytic mechanism. Conformational variability of the Cu site in one subunit of bovine CuZn superoxide dismutase: the importance of mobility in the Glu119-Leu142 loop region for catalytic function.,Hough MA, Strange RW, Hasnain SS J Mol Biol. 2000 Nov 24;304(2):231-41. PMID:11080458 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Superoxide Dismutase

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