2zcu

Crystal structure of a new type of NADPH-dependent quinone oxidoreductase (QOR2) from escherichia coli

spinqualitylabelsall models 2zcu, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2zcu is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU Related: 2zcv Activity: NADPH:quinone reductase, with EC number 1.6.5.5 Resources: FirstGlance, OCA, RCSB, PDBsum Function [YTFG_ECOLI] Quinone oxidoreductase that may play some additional role beyond quinone reduction. Potential redox sensor protein. Overexpression induces retardation of growth. 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 Escherichia coli QOR2 [NAD(P)H-dependent quinone oxidoreductase; a ytfG gene product], which catalyzes two-electron reduction of methyl-1,4-benzoquinone, is a new type of quinone-reducing enzyme with distinct primary sequence and oligomeric conformation from previously known quinone oxidoreductases. The crystal structures of native QOR2 and the QOR2-NADPH (nicotinamide adenine dinucleotide phosphate, reduced form) complex reveal that QOR2 consists of two domains (N-domain and C-domain) resembling those of NmrA, a negative transcriptional regulator that belongs to the short-chain dehydrogenase/reductase family. The N-domain, which adopts the Rossmann fold, provides a platform for NADPH binding, whereas the C-domain, which contains a hydrophobic pocket connected to the NADPH-binding site, appears to play important roles in substrate binding. Asn143 near the NADPH-binding site has been identified to be involved in substrate binding and catalysis from structural and mutational analyses. Moreover, compared with wild-type strain, the qor2-overexpressing strain shows growth retardation and remarkable decrease in several enzymes involved in carbon metabolism, suggesting that QOR2 could play some physiological roles in addition to quinone reduction. Crystal structure of a new type of NADPH-dependent quinone oxidoreductase (QOR2) from Escherichia coli.,Kim IK, Yim HS, Kim MK, Kim DW, Kim YM, Cha SS, Kang SO J Mol Biol. 2008 May 30;379(2):372-84. Epub 2008 Apr 8. PMID:18455185 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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