5f9p | pdb_00005f9p

Crystal structure study of anthrone oxidase-like protein

spinqualitylabelsall models 5f9p, resolution 2.08Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5f9p is a 2 chain structure with sequence from Atcc 23877. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL NonStd Res: MSE Gene: alpJ, DSMT0187 (ATCC 23877) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed C-C bond ring cleaving oxygenases represent a unique family of enzymes involved in the B ring cleavage reaction only observed in atypical angucycline biosynthesis. B ring cleavage is the key reaction leading to dramatic divergence in the final structures of atypical angucyclines. Here, we present the crystal structure of AlpJ, the first structure of this family of enzymes. AlpJ has been verified as the enzyme catalyzing C-C bond cleavage in kinamycin biosynthesis. The crystal structure of the AlpJ monomer resembles the dimeric structure of ferredoxin-like proteins. The N- and C-terminal halves of AlpJ are homologous, and both contain a putative hydrophobic substrate binding pocket in the "closed" and "open" conformations, respectively. Structural comparison of AlpJ with ActVA-Orf6 and protein-ligand docking analysis suggest that the residues including Asn60, Trp64, and Trp181 are possibly involved in substrate recognition. Site-directed mutagenesis results supported our hypothesis, as mutation of these residues led to nearly a complete loss of the activity of AlpJ. Structural analysis also revealed that AlpJ possesses an intramolecular domain-domain interface, where the residues His50 and Tyr178 form a hydrogen bond that probably stabilizes the three-dimensional structure of AlpJ. Site-directed mutagenesis showed that the two residues, His50 and Tyr178, were vital for the activity of AlpJ. Our findings shed light on the structure and catalytic mechanism of the AlpJ family of oxygenases, which presumably involves two active sites that might function in a cooperative manner. Structure and Function of a C-C Bond Cleaving Oxygenase in Atypical Angucycline Biosynthesis.,Pan G, Gao X, Fan K, Liu J, Meng B, Gao J, Wang B, Zhang C, Han H, Ai G, Chen Y, Wu D, Liu ZJ, Yang K ACS Chem Biol. 2017 Jan 20;12(1):142-152. doi: 10.1021/acschembio.6b00621. Epub, 2016 Nov 30. PMID:28103689 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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