3lzx | pdb_00003lzx

Crystal structure of ferredoxin-NADP+ oxidoreductase from Bacillus subtilis (FORM II)

spinqualitylabelsall models 3lzx, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3lzx is a 2 chain structure with sequence from "vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FAD, NA, NAP Related: 3lzw Activity: Ferredoxin--NADP(+) reductase, with EC number 1.18.1.2 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Bacillus subtilis yumC encodes a novel type of ferredoxin-NADP(+) oxidoreductase (FNR) with a primary sequence and oligomeric conformation distinct from those of previously known FNRs. In this study, the crystal structure of B. subtilis FNR (BsFNR) complexed with NADP(+) has been determined. BsFNR features two distinct binding domains for FAD and NADPH in accordance with its structural similarity to Escherichia coli NADPH-thioredoxin reductase (TdR) and TdR-like protein from Thermus thermophilus HB8 (PDB code: 2ZBW). The deduced mode of NADP(+) binding to the BsFNR molecule is nonproductive in that the nicotinamide and isoalloxazine rings are over 15 A apart. A unique C-terminal extension, not found in E. coli TdR but in TdR-like protein from T. thermophilus HB8, covers the re-face of the isoalloxazine moiety of FAD. In particular, Tyr50 in the FAD-binding region and His324 in the C-terminal extension stack on the si- and re-faces of the isoalloxazine ring of FAD, respectively. Aromatic residues corresponding to Tyr50 and His324 are also found in the plastid-type FNR superfamily of enzymes, and the residue corresponding to His324 has been reported to be responsible for nucleotide specificity. In contrast to the plastid-type FNRs, replacement of His324 with Phe or Ser had little effect on the specificity or reactivity of BsFNR with NAD(P)H, whereas replacement of Arg190, which interacts with the 2'-phosphate of NADP(+) , drastically decreased its affinity toward NADPH. This implies that BsFNR adopts the same nucleotide binding mode as the TdR enzyme family and that aromatic residue on the re-face of FAD is hardly relevant to the nucleotide selectivity. Crystal structure analysis of Bacillus subtilis ferredoxin-NADP(+) oxidoreductase and the structural basis for its substrate selectivity.,Komori H, Seo D, Sakurai T, Higuchi Y Protein Sci. 2010 Dec;19(12):2279-90. doi: 10.1002/pro.508. Epub 2010 Nov, 3. PMID:20878669 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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