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Solid-phase Synthesis of [4.4] Spirocyclic Oximes
Published on: February 6, 2019
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セトスシン生物合成におけるスピロフラノン形成の分子および計算的基礎
Xingxing Wei1, Taro Matsuyama2, Hajime Sato2,3
1Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
Journal of the American Chemical Society
|October 13, 2021
まとめ
研究者らは,真菌のメロディテルペノイドセトスシンの生合成を解明し,スパイロフラノン形成のための新しいサイトクロームP450酵素機構を明らかにした. この発見は 生物学的活性のある天然製品の生産に 光を当てます
科学分野:
- 自然製品の生物合成
- 菌類による二次代謝
- 酵素触媒
背景:
- 抗真菌薬グライソフルビンを含む生物活性天然製品に,3~2H) - フルアノンが含まれています.
- セトスシン (1) は,独特のスパイロ溶融3 ((2H) -フラーノン構造を特徴とする真菌のメロディテルペノイドである.
- セトスシンのスピロフルアノン形成の生合成経路は,その分離以来未調査のままである.
研究 の 目的:
- Aspergillus duricaulis CBS 481.65におけるセトスシン (1) の生物合成遺伝子クラスタを特定する.
- アスペルギルス・オライザ (Aspergillus oryzae) の異質発現によるセトスシン (1) の生物合成経路を解明する.
- スピロフラノン形成の裏にある反応機構を理解する.
主な方法:
- セトスシン生物合成遺伝子群の特定
- アスペルギルス・オライザの酵素活性性の異質解明
- インビヴォとインビトロの同位体組み込み実験
- 理論的な計算だ
- SetF酵素のサイト指向型変異.
主要な成果:
- セトスシン (1) の生物合成遺伝子クラスターが特定されました.
- 生物合成経路はAspergillus oryzaeで再構成された.
- サイトクロームP450酵素SetFはスピロフラノン合成に不可欠であることが判明しました.
- SetFはエポキシデーションとプロトネーションによる再配置の両方を触媒化する.
- ミュタゲネシスは,Lys303をSetFにおける潜在的触媒残留物として特定した.
結論:
- この研究では,真菌のメロディテルペノイドセトスシン (1) の生物合成経路が明らかにされています.
- スピロフラノン形成のためのサイトクロームP450酵素SetFを含む新しいメカニズムが発見されました.
- この研究は,複雑な自然産物の生物合成と酵素の機能の洞察を提供します.
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