樹脂で固定されたリボジームによるアミノアシル-tRNA合成
Hiroshi Murakami1, Neil J Bonzagni, Hiroaki Suga
1Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260-3000.
Journal of the American Chemical Society
|June 13, 2002
まとめ
研究者は,トランスファーRNA (tRNA) のアミノアシレーションのための新しい樹脂固定リボジーム方法を開発しました. この実用的なテクニックは,in vitroトランスレーションシステムに非自然なアミノアシル-tRNAを効率的に供給します.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 合成生物学 合成生物学とは
背景:
- 転送RNA (tRNA) のアミノアシレーションは,タンパク質合成に不可欠です.
- 非自然なアミノアシル-tRNAsの効率的な生産は,先進的な in vitro 翻訳システムに必要です.
研究 の 目的:
- tRNAアミノアシレーションのための新しい実用的な方法を開発する.
- アミノアシレーション反応で繰り返し使用するためにリボエンザイムを不動化する.
- 様々な非自然なアミノアシル-tRNAをインビトロトランスレーションのために供給する.
主な方法:
- 酸化リボエンザイムをコヴァレンントリンクを通じて水素樹脂に固定する.
- リボジーム樹脂列とシアノメチルエステル (CME) アミノ酸基板を用いたtRNAのアミノアシレーション.
- リボジーム-樹脂列を複数のアミノアシレーションサイクルでリサイクルする.
主要な成果:
- 移動不可能なリボジームを用いてtRNAの成功アミノアシレーションが達成されました.
- リボジーム樹脂列は安定性を示し,最小限の活動損失で最大5回までリサイクルされました.
- この方法は,アミノアシル-tRNAsを効率的に生成しました.
結論:
- 新しい,実用的なリボ酵素ベースのアミノアシレーション法が確立されました.
- 固定されたリボ酵素システムは,tRNAアミノアシレーションのための安定した,再利用可能なアプローチを提供します.
- この技術は,in vitro翻訳のための多様な非自然なアミノアシル-tRNAを供給する大きな可能性を秘めています.
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Transfer RNA Synthesis
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases.
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
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