プラスチド2オキシグルタラート依存型ダイオキシゲナーゼは,カルデノリド生物合成におけるステレオ選択C14β-ヒドロキシル化を媒介する
Jianhua Wang1, Xuan Zhou1, Wenjuan Ji1
1Shanghai Collaborative Innovation Center of Agri-Seeds, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
まとめ
植物進化は様々なカルデノリドの産生を促しています. 研究者らは,ペリプロカ・セピウム (Periploca sepium) の新種の遺伝子を特定し,これらの複雑な薬用化合物の独立した進化を明らかにした.
科学分野:
- 植物生化学について
- 進化生物学の進化生物学について
- ゲノミクスゲノミクスとは
背景:
- カルデノリドは,心不全と癌の治療薬として使用される植物由来化合物です.
- 植物ファミリーにおける様々なカルデノリド構造の進化は十分に理解されていません.
- カルデノリド生物合成の理解は,医薬品化学と植物科学にとって極めて重要です.
研究 の 目的:
- アポサイナセア科のカルデノリド生物合成の背後にある進化的メカニズムを調査する.
- 構造的に多様なカルデノリドの生産に関与する重要な遺伝子と酵素を特定する.
- 植物が特殊な代謝経路を開発するために使用する新しい進化的戦略を明らかにするために.
主な方法:
- ペリプロカ・セピウム (Periploca sepium) のゲノム配列解析について
- 2つの重要な遺伝子:PsCYP87とPs14βPHの識別と特徴付け.
- 先駆者の機能を決定するための遺伝子サイレンシングと同位体ラベル付けの実験.
- 酵素サブファミリーの系統遺伝分析.
主要な成果:
- カルデノリド生物合成に関与するPsCYP87 (CYP87Nサブファミリー) とPs14βPH遺伝子を特定しました.
- PsCYP87はApocynaceaeの中で独立して進化したようです.
- Ps14βPHは異常なプラスティド局所化を示し,家族特有である.
- 14β-ヒドロキシプレグネノロンが,P. sepium.における新しいカルデノリド前駆体であることを実証した.
結論:
- 植物進化は,特殊な代謝のために,酵素協調と変異したサブセルラー局所化を含む多様なメカニズムを採用しています.
- この研究は,異なる植物系におけるカルデノリド生物合成経路の独立した進化を明らかにしています.
- カルデノリド合成における希少なステレオ逆転ヒドロキシル化反応を触媒とする新しい酵素のクラスを特定した.
キーワード:
2オキシグルトラート依存型ダイオキシゲナーゼカルデノリド (cardenolides) とは独立した進化の進化です.ステレオ・インバーテッド・ヒドロキシル化.ステロイドC14機能化ステロイドである.さらに関連する動画
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