3hw7

High pressure (0.57 GPa) crystal structure of bovine copper, zinc superoxide dismutase at 2.0 angstroms

spinqualitylabelsall models 3hw7, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3hw7 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, CU1, ZN Related: 1cbj Activity: Superoxide dismutase, with EC number 1.15.1.1 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 2 A resolution crystal structure of bovine erythrocyte Cu,Zn superoxide dismutase (CuZnSOD) has been determined by X-ray diffraction at high pressure (0.57 GPa) and room temperature. At 0.57 GPa the secondary, tertiary and quaternary structures are similar to other previously determined bovine erythrocyte CuZnSOD structures. Nevertheless, pressure has a localized impact on the atomic coordinates of C(alpha) atoms and on side chains. The compression of the crystal and of the protein backbone is anisotropic. This anisotropy is discussed, taking into account intermolecular contacts and protein conformation. Pressure perturbation highlights the more flexible zones in the protein such as the electrostatic loop. At 0.57 GPa, a global shift of the dimetallic sites in both subunits and changes in the oxidation state of Cu were observed. The flexibility of the electrostatic loop may be useful for the interaction of different metal carriers in the copper-uptake process, whereas the flexibility of the metal sites involved in the activity of the protein could contribute to explaining the ubiquitous character of CuZnSODs, which are found in organisms living in very different conditions, including the deep-sea environment. This work illustrates the potential of combining X-ray crystallography with high pressure to promote and stabilize higher energy conformational substates. Flexibility of the Cu,Zn superoxide dismutase structure investigated at 0.57 GPa.,Ascone I, Savino C, Kahn R, Fourme R Acta Crystallogr D Biol Crystallogr. 2010 Jun;66(Pt 6):654-63. Epub 2010 May 15. PMID:20516618 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Superoxide dismutase 3D structures

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