抗菌剤耐性を引き起こすリボソームメチルトランスファーゼの決定因子の解読
Ruchika Bhujbalrao1, Ruchi Anand1
1Department of Chemistry , Indian Institute of Technology Bombay , Powai, Mumbai 400076 , India.
Journal of the American Chemical Society
|January 10, 2019
まとめ
科学者たちは 抗生物質耐性酵素を模倣する リボソームメチルトランスフェラーゼ (rMtase) を設計しました この研究は,RNA標的を決定する重要な構造的特徴を明らかにし,病原体の耐性に対抗するための洞察を提供します.
科学分野:
- 分子生物学
- 生物化学
- 微生物学
背景:
- リボソームRNA (rRNA) の翻訳後のメチル化は,病原体耐性の重要なメカニズムである.
- リボソームメチルトランスフェラーゼ (rMtases) は,この過程における重要な酵素ですが,その基板特異性は完全に理解されていません.
- これらの決定因子を理解することは 抗生物質耐性に対する戦略の開発に不可欠です
研究 の 目的:
- リボソームメチルトランスフェラーゼ (rMtases) の基板特異性を決定する特定の構造的決定因子を特定する.
- 抗生物質耐性に関連したrMtases (Erms) に類似した特異性を示すために,家庭用rMtases (KsgA) を設計する.
- RNA認識とマクロリド耐性における特定の構造要素の役割を調査する.
主な方法:
- 進化的分析と構造によるアプローチの組み合わせを用いて,キメリック rMtases を作成した.
- 基質特異性を変化させるためのKsgA-Ermキメラを設計・合成した.
- マクロリド耐性を含む,設計された特異性の機能的影響を評価するために,in vivo試験を実施した.
主要な成果:
- rMtasesにおける相性RNA選択の重要な決定因子として,Rossmann foldの特定のループ領域を特定した.
- エリトロマイシン耐性メチルトランスファーゼ (Erms) の基板特異性を採用するためにKsgAを成功裏に設計した.
- キメリック構造がマクロリド耐性を in vivoで与え,エンジニアリングされた特異性を検証した.
結論:
- ロスマン折りの内にある特定のループの装飾は,rMtasesによって基板の認識に不可欠である.
- 抵抗メカニズムを理解するための強力なモデルを提供します.
- この研究は,これらの酵素をターゲットにすることで,抗生物質耐性に対抗する新しい阻害剤を設計するための基礎を築きます.
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