5i6k

Crystal Structure of Copper Nitrite Reductase at 100K after 0.69 MGy

spinqualitylabelsall models 5i6k, resolution 1.07Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5i6k is a 1 chain structure with sequence from Achromobacter cycloclastes. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.07Å Ligands: CU, NO2 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NIR_ACHCY Publication Abstract from PubMed Relating individual protein crystal structures to an enzyme mechanism remains a major and challenging goal for structural biology. Serial crystallography using multiple crystals has recently been reported in both synchrotron-radiation and X-ray free-electron laser experiments. In this work, serial crystallography was used to obtain multiple structures serially from one crystal (MSOX) to study in crystallo enzyme catalysis. Rapid, shutterless X-ray detector technology on a synchrotron MX beamline was exploited to perform low-dose serial crystallography on a single copper nitrite reductase crystal, which survived long enough for 45 consecutive 100 K X-ray structures to be collected at 1.07-1.62 A resolution, all sampled from the same crystal volume. This serial crystallography approach revealed the gradual conversion of the substrate bound at the catalytic type 2 Cu centre from nitrite to nitric oxide, following reduction of the type 1 Cu electron-transfer centre by X-ray-generated solvated electrons. Significant, well defined structural rearrangements in the active site are evident in the series as the enzyme moves through its catalytic cycle, namely nitrite reduction, which is a vital step in the global denitrification process. It is proposed that such a serial crystallography approach is widely applicable for studying any redox or electron-driven enzyme reactions from a single protein crystal. It can provide a 'catalytic reaction movie' highlighting the structural changes that occur during enzyme catalysis. The anticipated developments in the automation of data analysis and modelling are likely to allow seamless and near-real-time analysis of such data on-site at some of the powerful synchrotron crystallographic beamlines. Serial crystallography captures enzyme catalysis in copper nitrite reductase at atomic resolution from one crystal.,Horrell S, Antonyuk SV, Eady RR, Hasnain SS, Hough MA, Strange RW IUCrJ. 2016 Jun 15;3(Pt 4):271-81. doi: 10.1107/S205225251600823X. eCollection, 2016 Jul 1. PMID:27437114 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Nitrite reductase 3D structures

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