4ysq

Structure of copper nitrite reductase from Geobacillus thermodenitrificans - 8.38 MGy

spinqualitylabelsall models 4ysq, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4ysq is a 1 chain structure with sequence from Geotn. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU, MPD, SO4 Related: 4ysa, 4ysc, 4ysd, 4yse, 4yso, 4ysp, 4yss, 4yst, 4ysu Gene: nirK, GTNG_0650 (GEOTN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Serial femtosecond crystallography (SFX) has enabled the damage-free structural determination of metalloenzymes and filled the gaps of our knowledge between crystallographic and spectroscopic data. Crystallographers, however, scarcely know whether the rising technique provides truly new structural insights into mechanisms of metalloenzymes partly because of limited resolutions. Copper nitrite reductase (CuNiR), which converts nitrite to nitric oxide in denitrification, has been extensively studied by synchrotron radiation crystallography (SRX). Although catalytic Cu (Type 2 copper (T2Cu)) of CuNiR had been suspected to tolerate X-ray photoreduction, we here showed that T2Cu in the form free of nitrite is reduced and changes its coordination structure in SRX. Moreover, we determined the completely oxidized CuNiR structure at 1.43 A resolution with SFX. Comparison between the high-resolution SFX and SRX data revealed the subtle structural change of a catalytic His residue by X-ray photoreduction. This finding, which SRX has failed to uncover, provides new insight into the reaction mechanism of CuNiR. Redox-coupled structural changes in nitrite reductase revealed by serial femtosecond and microfocus crystallography.,Fukuda Y, Tse KM, Suzuki M, Diederichs K, Hirata K, Nakane T, Sugahara M, Nango E, Tono K, Joti Y, Kameshima T, Song C, Hatsui T, Yabashi M, Nureki O, Matsumura H, Inoue T, Iwata S, Mizohata E J Biochem. 2016 Jan 14. pii: mvv133. PMID:26769972 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Nitrite reductase 3D structures

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