Flavoprotein Dioxygenaseは,コエンザイムA-エステル酸化とリングエポキシデーションによるバクテリアのトロポン生物合成を誘導する
Ying Duan1, Marina Toplak1, Anwei Hou2
1Faculty of Biology, University of Freiburg, Schänzlestrasse 1, 79104 Freiburg, Germany.
Journal of the American Chemical Society
|July 1, 2021
まとめ
バクテリアのトロポンの天然産物バイオシンセシスは,酸素分解とエポキシデーションを含む複雑な反応を触媒する新しいフラボ酵素,TdaEを含む. この酵素は共生相互作用でトロポロンや他の重要な化合物を生成する鍵です.
科学分野:
- 生物化学
- 微生物学
- 自然製品合成
背景:
- バクテリアのトロポンの天然産物 (例えば,トロポロン,トロポジエティック酸) は,共生相互作用において不可欠である.
- 生物合成の経路は ほとんど解明されていません
研究 の 目的:
- バクテリアのトロポンの生体合成を解明する.
- フラボ酵素TdaEの機能と触媒メカニズムを記述する.
主な方法:
- TdaEの酵素特性について
- フェニル酸の代謝シャント産物の分析
- 酸素分解とエポキシデーションを含む触媒的ステップの調査.
主要な成果:
- TdaEはフェニル酸の分解シャント製品を回収する.
- TdaEは,脱水化,CoAエステル酸化,およびエポキシデーションという複雑な触媒作用を示している.
- TdaEは,O2原子の両方を基質に組み込み,フラボタンパク質ダイオキシゲナーゼとして作用する.
- 酵素製品は自発的に脱炭素化しトロポロンを形成する.
結論:
- TdaEはトロポンの天然産物生物合成における重要な酵素である.
- 酵素のメカニズムは,フラボプロテイン・ダイオキシゲナーゼの活性に関する洞察を提供します.
- TdaEの産物は,毒性 (例えば,米粉病のトロポロン) または複雑な代謝産物形成 (例えば,トロポディシー酸) に極めて重要です.
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