JadXは自然産物結合タンパク質である
Andrew W Robertson, Stephanie M Forget, Camilo F Martinez-Farina
1Institute for Marine Biosciences, National Research Council of Canada , Halifax, Nova Scotia B3H 3Z1, Canada.
Journal of the American Chemical Society
|January 28, 2016
まとめ
JadXは,Streptomyces venezuelaeからの新しいタンパク質で,ジャドミシンとクロラムフェニコルの両方に結合します. このタンパク質はこれらの天然産物の産生に影響を与え,二次代謝生物合成における規制的役割を示唆する.
科学分野:
- 微生物学
- 生物化学
- 分子生物学
背景:
- ジャドミシンとクロラムフェニコルを含む複数の天然製品を産生します.
- ジャドミシン遺伝子クラスターにコードされている JadX タンパク質の機能は以前は知られていなかった.
研究 の 目的:
- JadXタンパク質の 機能的特徴を特定する
- JadXとS. venezuelaeによって生成された天然製品との相互作用を調査する.
- 二次代謝産物の調節におけるJadXの役割を調査する.
主な方法:
- 再結合 JadX タンパク質が生成され,特徴づけられました.
- タンパク質とリガンドの相互作用は,化学的シフト乱射とWaterLOGSYを含むNMRスペクトロスコーピーの技術を用いて研究された.
- ジャドミシンとクロラムフェニコルの生成に対するJadXの効果は,S. venezuelaeのブロックされた変異体で評価された.
主要な成果:
- JadXは,ジャドミシンとクロラムフェニコルの両方にインビトロで結合することが判明しました.
- JadXは,ジャドミシンとクロラムフェニコルの両方の産生レベルに影響を与える.
- これらの発見は,JadXが異常な天然の製品結合タンパク質であることを示しています.
結論:
- JadXは,構造的に多様な分子と相互作用する能力を持つ天然の製品結合タンパク質の新しいクラスを表しています.
- 二重結合能力と in vivo の効果は,S. venezuelae の二次代謝生物合成の調節またはシグナル伝達に作用することを示唆しています.
- この研究は,JadXのようなタンパク質の最初の機能的特徴を明らかにし,これまで認識されていない規制メカニズムを明らかにしました.
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