転置可能な元素のエクソニゼーションは,進化し機能するタンパク質イソフォームの貯蔵庫を生成する
Yago A Arribas1, Blandine Baudon1, Maxime Rotival2
1Institut Curie, PSL University, Inserm U932, Immunity and Cancer, 75005 Paris, France.
Cell
|December 12, 2024
まとめ
移植可能な要素 (TEs) は新しいタンパク質イソフォームにスプライスされ,ヒトのタンパク質の多様性を増やすことができます. これらの機能的 TE-spliced isoformsは,表現が低いものの,個体間で保存され,自然選択によって形作られる可能性があります.
科学分野:
- ゲノミクス
- 分子生物学
- 進化生物学
背景:
- 代替スプライシングは,移植可能な元素 (TE) のエクソニゼーションを含むタンパク質の多様性を生み出します.
- 無注釈のTE-splicedトランスクリプトの生物学的関連性とタンパク質学的貢献は,ほとんど不明である.
研究 の 目的:
- mRNAスプライシングによって生成された,注釈されていないTE-エクソニジングイソフォームの集団を特徴づける.
- 人口におけるその流行,翻訳効率,機能的関連性を調査する.
主な方法:
- トランスクリプトーム組立
- リボソームプロファイリング
- プロテオミクス
- 機能分析
主要な成果:
- ヒト集団で再発する1,227の注釈されていないTE- エクソニジングイソフォームが特定されました.
- これらのアイソフォームは効率的に翻訳され,安定して表現され,特定の細胞局所化を示し,時には機能が変更されます.
- エクゾニズされたTEsはしばしば古代であり,最近のスプライスサイトに関連しており,二次構造のイソフォームに寄与する.
結論:
- TE-spliced isoformsは,機能的なタンパク質の多様性の重要な貯蔵庫を表しています.
- これらのアイソフォームは自然選択の対象であり,その進化的重要性を強調しています.
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