ユビキチン化プロテオームの再配線がC. elegansの老化を決定する
Seda Koyuncu1, Rute Loureiro1, Hyun Ju Lee1
1Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.
Nature
|July 29, 2021
まとめ
細胞の整合性は,変化したユビキチネーションにより,年齢とともに低下する. タンパク質の分解経路を回復させることで 寿命が延びるのです
科学分野:
- 細胞生物学
- ゲロントロジー
- 生物化学
背景:
- 老化は細胞の整合性の低下によって特徴付けられます.
- ユビキチン改変は細胞機能において重要な役割を果たします.
- ユビキティナーションと老化との関係を理解することは 長寿研究にとって不可欠です
研究 の 目的:
- ユビキチネーションと老化過程の関係を調査する.
- 老化時にユビキチネーションシグネチャーの変化を特定する.
- タンパク質の分解が寿命に与える影響を 調べるため
主な方法:
- Caenorhabditis elegansにおける全タンパク質のユビキチンシグネチャーの定量化
- 食事制限とインスリンシグナル伝達が低下した状態で,ユビキチン化プロテオームの変化の分析.
- 欠陥プロテアソームを持つワームからのデータを統合して,年齢累積の標的を特定します.
主要な成果:
- 老化により,デウビキチネーゼの活性が増加したため,全般的なユビキチネーゼ喪失が特徴となる,ユビキチネーゼプロテオームの改造が起こります.
- プロテアソマル標的は,ユビキチン化が減り,その後の分解により,年齢とともに蓄積する.
- 年代調節不良のプロテアソーム標的のレベルを下げることで 寿命が延びると同時に 退廃を防ぐことで 寿命が短縮されます
結論:
- 標的タンパク質の分解の年齢関連の変化は長寿に大きく影響する.
- IFB-2 と EPS-8 のような特定のタンパク質は,主要な年齢調節不良のタンパク質標的として特定されています.
- タンパク質の分解経路をターゲットにした介入は寿命を延長する可能性を秘めています
関連する概念動画
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Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
Transcription is the synthesis of RNA molecules by RNA...
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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...
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...