METTL18は,適切な翻訳とプロテオスタシスを維持することによって,臓の機能を保証します
Tadahiro Shimazu1, Megumi Gowa1, Ayane Kataoka1
1Cellular Memory Laboratory, Pioneering Research Institute, RIKEN, Wako, Saitama, 351-0198, Japan.
Molecular metabolism
|February 19, 2026
まとめ
METTL18酵素は,タンパク質翻訳を調節し,有害な蓄積を防止して,臓の機能に不可欠です. その欠乏は,糖尿病とマウスのタンパク質の蓄積につながります.
科学分野:
- 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
- 細胞生物学 細胞生物学
背景:
- メチルトランスフェラーゼは,メチル化によってバイオ分子を変更する酵素です.
- METTL18は,リボソームタンパク質RPL3 (uL3) を標的にする特定のヒスティジンメチルトランスフェラーゼです.
- 生理学的過程におけるMETTL18のインビボ機能は十分に理解されていません.
研究 の 目的:
- METTL18の生理学的役割を in vivoで調査するために.
- METTL18が臓の機能,トランスレーション,およびプロテオスタシスに及ぼす影響を決定する.
主な方法:
- Mettl18 ノックアウト (KO) マウスの生成と分析.
- 臓機能の評価,メチル化レベル,タンパク質の集積.
- 臓のアシナ細胞系におけるリボソームのプロファイリングで,翻訳的変化を研究する.
主要な成果:
- Mettl18 KOマウスは,離乳前の死亡率,臓のN3-ヒスティジンメチレーションの減少,糖尿病のフェノタイプ,およびタンパク質の集積を示した.
- METTL18の喪失は,プロリンコドンにおける加速された伸縮を含む,グローバルな翻訳的変化を誘発した.
- タンパク質の折りたたみ障害は,炎に関連したタンパク質の集積と,展開されたタンパク質応答の活性化につながった.
結論:
- METTL18は,臓の機能とプロテオスタシスの維持に不可欠です.
- ヒスティジンメチル化は,生理学的に重要な翻訳後の修正である.
- METTL18は,タンパク質の集積と疾患の表型を防ぐために翻訳動態を調節します.
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