2つの別々の遺伝子クラスターは,アスペルギルス・ニドゥランス (Aspergillus nidulans) のメロテルペノイド・オースチンノール (austinol) とデヒドロアースチンノール (dehydroaustinol)
Hsien-Chun Lo1, Ruth Entwistle, Chun-Jun Guo
1Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, 1985 Zonal Avenue, Los Angeles, California 90089, United States.
Journal of the American Chemical Society
|February 15, 2012
まとめ
驚くべきことに,アスペルギルスニドゥランスの2つの別々の遺伝子クラスターは,真菌のメロテルペノイド生物合成に必要である. この研究は,完全な生物合成経路を明らかにし,新しい化合物と中間物質を特定します.
科学分野:
- 菌類学 菌類学とは
- 自然製品化学 自然製品化学
- 分子生物学は分子生物学である.
背景:
- メロテルペノイドは,ポリケチドおよびテルペノイド前駆体から派生した真菌の天然製品です.
- メロテルペノイドの生物合成を理解することは,新しい化合物を設計し,生産を向上させるための鍵です.
- アスペルギルスニドゥランスは,オースチノールやデヒドロアースチノールなどのメロテルペノイドを生成することが知られている.
研究 の 目的:
- アスペルギルス・ニドゥランス (Aspergillus nidulans) のメロテルペノイドの生物合成経路を遺伝学的に解明する.
- メロテルペノイドの産生を司る特定の遺伝子クラスタを特定する.
- 新規のメロテルペノイド中間物質および製品の特徴を特定する.
主な方法:
- アスペルギルス・ニドゥランスにおける標的型遺伝子消去実験.
- 変異株からの抽出物の化学分析.
- メロテルペノイド化合物の分離と識別.
主要な成果:
- ポリケチド合成酵素遺伝子 ausA を含む1つ,プレニル転送酵素遺伝子 ausN を含む2つの異なる遺伝子クラスターは,メロテルペノイド生物合成に不可欠です.
- 6つの新しい化合物を含む3,5-ジメチルセルリン酸と10の他のメロテルペノイドの分離.
- 生物合成中間物質とシャント製品の識別.
結論:
- Aspergillus nidulansにおけるメロテルペノイド生物合成には,2つの別々の遺伝子クラスターが必要です.
- これらの真菌メロテルペノイドの完全な生物合成経路が提案されています.
- この発見は,メロテルペノイドの代謝工学の基礎となる.
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