6zax

Nitrite-bound copper nitrite reductase from Bradyrhizobium sp. ORS 375 (two-domain) at low dose (0.5 MGy)

spinqualitylabelsall models 6zax, resolution 1.48Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6zax is a 1 chain structure with sequence from Bradyrhizobium sp. ORS 375. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.48Å Ligands: CU, FRU, GLC, GOL, NO2, PRD_900003, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function H0SLX7_BRAS3 Publication Abstract from PubMed Copper-containing nitrite reductases (CuNiRs), encoded by nirK gene, are found in all kingdoms of life with only 5% of CuNiR denitrifiers having two or more copies of nirK Recently, we have identified two copies of nirK genes in several alpha-proteobacteria of the order Rhizobiales including Bradyrhizobium sp. ORS 375, encoding a four-domain heme-CuNiR and the usual two-domain CuNiR (Br (2D)NiR). Compared with two of the best-studied two-domain CuNiRs represented by the blue (AxNiR) and green (AcNiR) subclasses, Br (2D)NiR, a blue CuNiR, shows a substantially lower catalytic efficiency despite a sequence identity of ~70%. Advanced synchrotron radiation and x-ray free-electron laser are used to obtain the most accurate (atomic resolution with unrestrained SHELX refinement) and damage-free (free from radiation-induced chemistry) structures, in as-isolated, substrate-bound, and product-bound states. This combination has shed light on the protonation states of essential catalytic residues, additional reaction intermediates, and how catalytic efficiency is modulated. An unprecedented insight into the catalytic mechanism of copper nitrite reductase from atomic-resolution and damage-free structures.,Rose SL, Antonyuk SV, Sasaki D, Yamashita K, Hirata K, Ueno G, Ago H, Eady RR, Tosha T, Yamamoto M, Hasnain SS Sci Adv. 2021 Jan 1;7(1):eabd8523. doi: 10.1126/sciadv.abd8523. Print 2021 Jan. PMID:33523860 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Nitrite reductase 3D structures

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