1wb8

Iron Superoxide Dismutase (FE-SOD) from the Hyperthermophile SULFOLOBUS SOLFATARICUS. 2.3 A Resolution Structure of Recombinant Protein with a Covalently Modified Tyrosine in the Active Site.

spinqualitylabelsall models 1wb8, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1wb8 is a 2 chain structure with sequence from Saccharolobus solfataricus. This structure supersedes the now removed PDB entry 1sss. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.3Å Ligands: FE, PMS Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SODF_SACS2 Destroys superoxide anion 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 crystal structure of superoxide dismutase (SOD) from the hyper thermophile Sulfolobus solfataricus has been determined at 2.3 A resolution by molecular replacement and refined to a crystallographic R-factor of 16.8 % (Rfree 19.8 %). The crystals belong to the space group C2 (a=76.3 A, b=124.3 A, c=60.3 A, beta=128.8 degrees) with two identical monomers in the asymmetric unit. The monomer has a molecular weight of 24 kDa and consists of 210 amino acid residues of which 205 are visible in the electron density map. The overall fold of the monomer of S. solfataricus SOD is similar to that of the other known Fe or Mn-SODs. S. solfataricus SOD forms a very compact tetramer of a type similar to that of SOD from the hyperthermophile Aquifex pyrophilus. Both structures show an elevated number of inter-subunit ion-pairs compared with the mesophilic SOD from Mycobacterium tuberculosis and the thermophilic SOD from Thermus thermophilus. However, in contrast to the A. pyrophilus SOD structure, the number of intra-subunit ion-pairs as well as inter- subunit hydrogen bonds is not higher than in the compared mesophilic and thermophilic SOD structures. The electron density also revealed an unexpected and unusual covalent modification of a conserved tyrosine in the active site. Its involvement in the specific activity of the enzyme is discussed. Iron superoxide dismutase from the archaeon Sulfolobus solfataricus: analysis of structure and thermostability.,Ursby T, Adinolfi BS, Al-Karadaghi S, De Vendittis E, Bocchini V J Mol Biol. 1999 Feb 12;286(1):189-205. PMID:9931259 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Superoxide dismutase 3D structures

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