1c0l

D-AMINO ACID OXIDASE: STRUCTURE OF SUBSTRATE COMPLEXES AT VERY HIGH RESOLUTION REVEAL THE CHEMICAL REACTTION MECHANISM OF FLAVIN DEHYDROGENATION

spinqualitylabelsall models 1c0l, resolution 1.73Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1c0l is a 1 chain structure with sequence from Cbs 6016. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FAD, FLA Related: 1c0i, 1c0k, 1c0p Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [OXDA_RHOTO] This enzyme can effectively convert cephalosporin C into 7-beta-(5-carboxy-5-oxopentanamido)-cephalosporinic acid. 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 Flavin is one of the most versatile redox cofactors in nature and is used by many enzymes to perform a multitude of chemical reactions. d-Amino acid oxidase (DAAO), a member of the flavoprotein oxidase family, is regarded as a key enzyme for the understanding of the mechanism underlying flavin catalysis. The very high-resolution structures of yeast DAAO complexed with d-alanine, d-trifluoroalanine, and l-lactate (1.20, 1.47, and 1.72 A) provide strong evidence for hydride transfer as the mechanism of dehydrogenation. This is inconsistent with the alternative carbanion mechanism originally favored for this type of enzymatic reaction. The step of hydride transfer can proceed without involvement of amino acid functional groups. These structures, together with results from site-directed mutagenesis, point to orbital orientation/steering as the major factor in catalysis. A diatomic species, proposed to be a peroxide, is found at the active center and on the Re-side of the flavin. These results are of general relevance for the mechanisms of flavoproteins and lead to the proposal of a common dehydrogenation mechanism for oxidases and dehydrogenases. The x-ray structure of D-amino acid oxidase at very high resolution identifies the chemical mechanism of flavin-dependent substrate dehydrogenation.,Umhau S, Pollegioni L, Molla G, Diederichs K, Welte W, Pilone MS, Ghisla S Proc Natl Acad Sci U S A. 2000 Nov 7;97(23):12463-8. PMID:11070076 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Amino acid oxidase

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