N-メチルペプチドのリボソーム合成
Alexander O Subtelny1, Matthew C T Hartman, Jack W Szostak
1Howard Hughes Medical Institute and Center for Computational and Integrative Biology, Massachusetts General Hospital, 185 Cambridge Street, Boston, Massachusetts 02114, USA.
Journal of the American Chemical Society
|April 12, 2008
まとめ
この研究では,N-メチルアミノ酸 (N-Me AAs) が,再構成された細菌翻訳システムを用いてペプチドに組み込まれる可能性があることが示されています. この進歩は,新薬発見のための新しいペプチド図書館の作成を可能にします.
科学分野:
- バイオケミストリー バイオケミストリー
- 合成生物学 合成生物学とは
- 薬用化学 薬用化学について
背景:
- N-メチルアミノ酸 (N-Me AAs) は,多くの治療薬の源である非リボソームペプチド (NRPs) の重要な成分です.
- N-Me AAsは,硬さ,膜透過性,プロテアゼ耐性などのペプチド特性を強化する.
- これらの改変されたアミノ酸は,治療の可能性のある非自然なペプチドを合成するのに価値があります.
研究 の 目的:
- N-メチルアミノ酸 (N-Me AAs) がペプチドにリボソームで組み込まれていることを調査する.
- 薬剤発見のアプリケーションのために,複数のN-Me AAsを含むペプチドの合成を探求する.
主な方法:
- 再構成されたEscherichia coliの翻訳システムを使用しました.
- 化学的にメチル化,特にアミノアシル化トータルtRNAでシステムを補充しました.
- N-Me Leu,N-Me Thr,およびN-Me Valを識別し,効率的なリボソーム組み込みを可能にしました.
主要な成果:
- 3つの特定のN-Me AAs (N-Me Leu,N-Me Thr,N-Me Val) をリボソームによってペプチドに効率的に組み込むことが実証されました.
- 最大3つのN-Me AAsを含むペプチドを合成し,天然製品の薬物構造を模倣しました.
- N-Me AAsの組み込み効率と翻訳フィデリティを向上させました.
結論:
- 複数のN-Me AAsを含むペプチドのリボソーム合成は可能である.
- この方法論は,新薬候補者を特定するための非自然なペプチド図書館の作成を容易にする.
- これらのライブラリを in vitro で選択することで,治療対象に対する高親和性リガンドの発見の可能性.
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Ribosomes translate genetic information encoded by messenger RNA (mRNA) into proteins. Both prokaryotic and eukaryotic cells have ribosomes. Cells that synthesize large quantities of protein—such as secretory cells in the human pancreas—can contain millions of ribosomes.
Ribosome Structure and Assembly
Ribosomes are composed of ribosomal RNA (rRNA) and proteins. In eukaryotes, rRNA is transcribed from genes in the nucleolus—a part of the nucleus that specializes in ribosome production. Within...
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