関連する実験動画
Updated: May 7, 2026
11:36
In Vitro Ubiquitination and Deubiquitination Assays of Nucleosomal Histones
Published on: July 25, 2019
人間のアナフェーズ促進複合体によるユビキチン鎖形成のメカニズム
Lingyan Jin1, Adam Williamson, Sudeep Banerjee
1Department of Molecular and Cell Biology, 16 Barker Hall, University of California at Berkeley, Berkeley, CA 94720-3202, USA.
Cell
|May 20, 2008
まとめ
アナフェーズ促進複合体 (APC/C) は,細胞周期制御のためにK11結合ユビキチン鎖を使用する. 基板とウビキチンの上にある類似のTEK-boxモチーフは,効率的なチェーン組立と基板分解を可能にします.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- アナフェーズ促進複合体 (APC/C) は,細胞サイクル進行において極めて重要です.
- APC/Cを含むウビキチンリンガゼは,ウビキチン鎖を分解のための標的タンパク質に結合させます.
- 鎖の延長のためにリガスが基板からユビキチンリジン残基に切り替わるメカニズムは不明である.
研究 の 目的:
- 人間のAPC/C.によるユビキチン鎖の組み立てのメカニズムを解明する.
- APC/C媒介プロセスのユビキチン鎖のトポロジーと機能を決定する.
- APC/Cユビキチンリガゼ活性における特異性の分子基盤を特定する.
主な方法:
- ユビキチン鎖形成の構造分析.
- APC/Cの活動を研究するための生化学的測定法.
- ユビキティナーションに関与する主要なモチーフの識別と特徴付け.
主要な成果:
- APC/Cは主に基質の分解のためにK11に結合したユビキチン鎖を形成する.
- 効率的なK11結合連鎖形成には,TEK-boxと呼ばれる,ユビキチン上の特定の表面が必要です.
- 同型のTEK-boxモチーフは,APC/C基板に存在し,鎖核化を促進する.
結論:
- APC/Cは,K11に結合したユビキチン鎖を利用して,細胞サイクル進行を調節する.
- UbiquitinのTEK-boxモチーフは,効率的なK11連結チェーン組立に不可欠です.
- 基板とユビキチンの両方で類似したTEK-boxモチーフの認識により,APC/Cは細胞サイクル制御のための特定の効率的なユビキチネーションを達成することができます.
関連する概念動画
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00:50Anaphase Promoting Complex
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01:13The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important among these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
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01:17The Proteasome Structure
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The proteasome is an...
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