1azn

CRYSTAL STRUCTURE OF THE AZURIN MUTANT PHE114ALA FROM PSEUDOMONAS AERUGINOSA AT 2.6 ANGSTROMS RESOLUTION

spinqualitylabelsall models 1azn, resolution 2.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1azn is a 4 chain structure with sequence from Pseudomonas aeruginosa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU Resources: FirstGlance, OCA, RCSB, PDBsum Function [AZUR_PSEAE] Transfers electrons from cytochrome c551 to cytochrome oxidase. 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 azurin mutant Phe114Ala from Pseudomonas aeruginosa has been solved by molecular replacement. The final crystallographic R value is 0.185 for 9832 reflections to a resolution of 2.6 A. The root-mean-square deviation for main-chain atom positions is 0.020 A between the four independent monomers in the asymmetric unit. The mutant Ala114 crystallized from PEG 4000 in a new crystal form and the crystals are monoclinic, P2(1), a= 51.0, b = 83.6, c= 66.4 A and beta = 110.5 degrees. The four molecules in the asymmetric unit are packed as a dimer of dimers and are related by an approximate twofold axis. The dimer packing and the dimer contact region are very similar to that of the Alcaligenes denitrificans azurin dimer. The mutation was performed at residue Phe114, which exhibits a pi-electron overlap with the copper ligand His117, to investigate its suggested role in the electron self-exchange reaction. Removal of steric constrains from the phenylalanine side chain created a somewhat different geometry around the copper site with an increased mobility of His117 resulting in an enlarged Cu-N length which may be responsible for the slight differences obtained in the spectral properties of the mutant versus the wild-type protein. Structure of the azurin mutant Phe114Ala from Pseudomonas aeruginosa at 2.6 A resolution.,Tsai LC, Sjolin L, Langer V, Pascher T, Nar H Acta Crystallogr D Biol Crystallogr. 1995 Mar 1;51(Pt 2):168-76. PMID:15299318 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Azurin

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