リジン特異的ペプチダーゼの比較分析によるプロテオミクスワークフローの最適化
Leander Roeland van der Hoeven1, Maico Lechner1, Cristina Hernandez-Rollan1,2
1Novo Nordisk Foundation Center for Protein Research, Department of Cellular and Molecular Medicine, University of Copenhagen, Blegdamsvej 3B, Building 6.1, Copenhagen N DK-2200, Denmark.
Journal of proteome research
|December 22, 2025
まとめ
アキモノテラ・リティカス LysC は、ペプチド同定と消化効率を向上させることにより、質量分析プロテオミクスを強化します。この LysC エンドプロテアーゼホモログは、他のものと比較して優れた性能を発揮し、タンパク質網羅性を向上させるために見逃された切断を最小限に抑えます。
科学分野:
- プロテオミクス
- 酵素学
- 質量分析
背景:
- LysC エンドペプチダーゼは、質量分析ベースのプロテオミクスにおけるタンパク質消化に不可欠です。
- プロテオミクスワークフローを強化するための最適な酵素を特定するには、LysC ホモログの比較分析が必要です。
研究 の 目的:
- アキモノテラ・リティカス、*シュードモナス・エルギノーサ*、および*リソバクター・エンジモゲネス*由来の 3 つの LysC エンドプロテアーゼホモログを比較分析すること。
- タンパク質凝集捕捉ワークフローを用いた質量分析ベースのプロテオミクスにおけるそれらの性能を評価すること。
主な方法:
- LysC ホモログの切断特異性と消化効率の比較分析。
- HeLa 細胞ライセートを用いたタンパク質凝集捕捉ワークフローを利用。
- 消化時間を含む様々な実験条件下での酵素性能を評価。
主要な成果:
- 3つの LysC ホモログすべてが、リジン残基に対して高い特異性を示しました。*アキモノテラ・リティカス* LysC は、特に短い消化時間で、優れたペプチド同定、消化効率、およびタンパク質網羅性を実証しました。*A. lyticus* LysC とトリプシンを組み合わせることで、特にリジン含有ペプチドの消化漏れ率が大幅に減少しました。
結論:
- アキモノテラ・リティカス LysC は、質量分析ベースのプロテオミクスに非常に効果的なエンドペプチダーゼです。
- その優れた性能は、ペプチド同定とタンパク質網羅性を向上させ、プロテオミクス研究の最適な選択肢となります。
- LysC 酵素、特に *A. lyticus* LysC を使用することは、トリプシン消化における消化漏れを最小限に抑えるために不可欠です。
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