1C0P

D-AMINO ACIC OXIDASE IN COMPLEX WITH D-ALANINE AND A PARTIALLY OCCUPIED BIATOMIC SPECIES

1C0P の概要

• エントリーDOI: 10.2210/pdb1c0p/pdb
• 関連するPDBエントリー: 1C0I 1C0K 1C0L
• 分子名称: D-AMINO ACID OXIDASE, FLAVIN-ADENINE DINUCLEOTIDE, D-ALANINE, ... (6 entities in total)
• 機能のキーワード: alpha-beta-alpha motif, flavin containing protein, oxidase, oxidoreductase
• 由来する生物種: Rhodosporidium toruloides
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 40613.66

構造登録者

Umhau, S.,Pollegioni, L.,Molla, G.,Diederichs, K.,Welte, W.,Pilone, S.M.,Ghisla, S. (登録日: 1999-07-19, 公開日: 2000-11-22, 最終更新日: 2024-02-07)

主引用文献

Umhau, S.,Pollegioni, L.,Molla, G.,Diederichs, K.,Welte, W.,Pilone, M.S.,Ghisla, S.
The x-ray structure of D-amino acid oxidase at very high resolution identifies the chemical mechanism of flavin-dependent substrate dehydrogenation.
Proc.Natl.Acad.Sci.USA, 97:12463-12468, 2000

PubMed Abstract: 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.

PubMed: 11070076
DOI: 10.1073/pnas.97.23.12463

実験手法

X-RAY DIFFRACTION (1.2 Å)