Enediyne抗腫瘍抗生物質マドロペプチンのバイオシンセシスは,C-メチルトランスフェラーゼを特徴として,CoA結合の芳香基板に作用します
Jianya Ling1, Geoffrey P Horsman, Sheng-Xiong Huang
1Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA.
Journal of the American Chemical Society
|August 20, 2010
まとめ
マドロペプチン (MDP) 抗生物質の生物合成について
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 自然製品 化学 化学
背景:
- マドロペプチン (Maduropeptin,MDP) は,アクティノマドゥラ・マドゥレ (Actinomadura madurae) により生産される,エネダイヌ型抗腫瘍抗生物質である.
- MDPの染色体には3,6-ジメチルサリチル酸が含まれる.
- MDPのバイオシンセシスの理解は,新しい抗がん薬の開発に情報を提供することができます.
研究 の 目的:
- マドロペプチンの3,6-ジメチルサリシル酸分子の生物合成経路を解明する.
- この経路におけるMdpB,MdpB1,MdpB2,MdpB3酵素の役割について説明します.
- MDPアロマティック酸バイオシンセシスで用いられる異常な酵素論理を調査する.
主な方法:
- MDP生物合成遺伝子クラスタのバイオ情報分析.
- 酵素分析により,基質の特異性と反応機構を決定する.
- MdpB1およびMdpB2酵素の生化学的特徴.
主要な成果:
- MDPアロマティック酸の生物合成経路は,予期せぬ酵素的ステップの順番を特徴としています.
- MdpB2は,CoA結合によって,サリチル酸の類似体を活性化します.
- MdpB1は,MdpB2触媒による活性化に先立って,CoA結合の芳香酸をC-メチル化します.
結論:
- MDP染色体の芳香酸部分の生物合成は,従来とは異なる酵素配列に従っている.
- MdpB1がCoA結合基質をCメチル化する能力は,新しいものです.
- MdpB2の乱交的なCoAリゲーゼ活性により,新しいMDPアナログを設計する可能性を秘めています.
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