植物型IIIポリケチド合成酵素によって生成された細胞毒性テトラミック酸派生体
Toshiyuki Wakimoto1, Takahiro Mori, Hiroyuki Morita
1Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|March 12, 2011
まとめ
研究者らは,植物特異のベンザラセトン合成酵素 (BAS) を使用して,新しいテトラミック酸誘導体を設計した. 1つの誘導体は適度な抗増殖活性を示し,この多用途酵素の潜在能力を拡大しました.
科学分野:
- バイオケミストリー バイオケミストリー
- 自然製品合成 自然製品の合成
- 酵素学 酵素学とは
背景:
- テトラミック酸 (2,4-ピロリジンジオン) 誘導体は,抗菌性,抗ウイルス性,抗酸化性を含む多様な生物学的活性を持っています.
- これらの化合物は通常,複合型I型ポリケチド合成酵素/非リボソームペプチド合成酵素 (PKS/NRPS) ハイブリッドシステムによって合成されます.
- Rheum palmatumのベンザラセトン合成酵素 (BAS) のような植物特有のタイプIII PKSは,より単純な触媒機構と広範な基板特異性を提供します.
研究 の 目的:
- Rheum palmatum BASの新型テトラミック酸誘導体の合成の可能性を調査する.
- 化学的に合成されたアミノアシル-CoAチオエスターをBASの基板として使用することを調査する.
- 新しく合成されたテトラミック酸の誘導体の生物学的活性を評価する.
主な方法:
- Rheum palmatumからのベンザラセトン合成酵素 (BAS) を利用しました.
- 基板として化学合成されたL-およびD-アミノアシル-CoAチオエステルを使用しています.
- マロニル-コアによる凝縮反応を行った.
- ネズミ白血病P388細胞に対する合成化合物の抗増殖活動を評価した.
主要な成果:
- Rheum palmatum BASは,非天然のテトラミック酸派生物質のシリーズを効率的に生産しました.
- この酵素は,様々なアミノアシル-CoAチオエステルを使用することで,多用途性を示した.
- D-フェニララノイル-CoAから派生した新しいテトラミック酸二酸化物D-5は,中程度の抗増殖活性を示した.
結論:
- 植物由来型III PKS,特にBASは,新しいテトラミック酸誘導体を合成するために設計することができます.
- このアプローチは,テトラミック酸化合物の化学的多様性を自然産物経路を超えて拡大します.
- 観察された抗増殖活性は,BASで設計されたテトラミック酸の潜在的な治療用途を示唆しています.
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