単細胞プロテオゲノミクスによる細胞周期の時空解剖
Diana Mahdessian1, Anthony J Cesnik1,2,3, Christian Gnann1,3
1Science for Life Laboratory, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH - Royal Institute of Technology, Stockholm, Sweden.
Nature
|February 25, 2021
まとめ
この研究は,細胞サイクルにおけるヒトのタンパク質異質性をマッピングし,がんに関連した細胞間タンパク質の変異を明らかにしています. ほとんどのタンパク質の変化は,遺伝子発現ではなく,翻訳後に発生し,細胞の運命と代謝に影響を与えます.
科学分野:
- 細胞生物学
- プロテオミクス
- ゲノミクス
背景:
- 細胞の成長と分裂は 生命にとって不可欠です
- 細胞循環の調節不良は 癌のような病気に 関与しています
- 現存する研究では,細胞間プロテオミクスの変動性の体系的な分析が欠けている.
研究 の 目的:
- 人間のプロテオミクスの異質性に関する包括的な時空地図を作成する.
- 細胞サイクル中のタンパク質の細胞間変動を調査する.
- ミトーシスに関連したタンパク質とその潜在的な腫瘍的機能を特定する.
主な方法:
- 細胞下解像度でのプロテオミクスの統合と単細胞トランスクリプトミクスの統合.
- 細胞サイクル内の個々の細胞の正確な時間測定
- プロテオミクとトランスクリプトミクスのデータを分析して,細胞間の変異性を特定する.
主要な成果:
- ヒトのプロテオームの約20%は 細胞間多様性を表しています
- ミトーシスと細胞サイクルとの新しい関連を持つ何百ものタンパク質が特定されました.
- 細胞周期の進行は,観察された細胞間変化の半分未満を占める;ほとんどのタンパク質は翻訳後の調節である.
- サイクリングと非サイクリングの変数タンパク質の間でキナーゼ媒介のリン酸化が異なっており,細胞の運命と代謝に影響する.
結論:
- この研究は細胞周期の詳細なプロテオミックマップを提供し,重要な細胞間異質性を強調しています.
- がん研究において,潜在的に腫瘍を誘発する機能を持つタンパク質が特定されているため,さらなる調査が必要である.
- この発見は,細胞サイクル中のタンパク質レベルを調節する翻訳後の変化の重要性を強調しています.
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