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RAG2 C端末は,ゲノム不安定性とリンパマゲネシスを抑制する
Ludovic Deriano1, Julie Chaumeil, Marc Coussens
1Department of Pathology, New York University School of Medicine, New York, NY 10016, USA.
Nature
|March 4, 2011
まとめ
RAG2のタンパク質は,
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- 免疫学 免疫学とは
背景:
- V(D) J再結合によるDNA二重鎖断裂 (DSB) の誤った修復は,リンパ性がんと関連しています.
- DNA修復経路 (ATM,NHEJ,p53) の欠陥は,RAGが誘発するゲノム不安定性とリンパ系変異に対する感受性を高めます.
研究 の 目的:
- ゲノム安定性を維持するRAG2カルボキシ (C) 末端の役割を調査する.
- V(D) J再結合中にRAG2がゲノム整合性を影響するメカニズムを解明する.
主な方法:
- 遺伝子組み換えマウスのチモサイトおよびリンパ腫ゲノム解析 (Rag2 (((c/c),p53 (((-/-),Atm (((-/-)).
- T細胞受容体 (Tcr) 場所の整合性と染色体異常の評価.
- コアRAG2およびATM欠陥の文脈におけるRAG分裂後の複合体の安定性の調査.
主要な成果:
- RAG2のC端は,V(D) J再結合に欠かせないにもかかわらず,ゲノムの安定性にとって極めて重要です.
- Rag2 ((c/c) 発酵細胞はTcrα/δロカス不安定性を表している.
- Rag2 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c/c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c)) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53) p53 (p53)) p53 (p53) p53 (p53)) p53 (p53) Rag2 (c/c) p53 (c/c) p53 (c) p53 (c/c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c) p53 (c)
- コアRAG2は,RAGの分裂後の複合体を不安定化し,ATM欠乏性の効果を反映しています.
結論:
- RAG2は,ゲノムを保護する上でこれまで認識されていない役割を担っています.
- RAG2のC端はゲノムの守護者として作用し,ゲノムの不安定性を防止します.
- 共有された"終末放出/終末持続"メカニズムは,Rag2 ((c/c) p53 ((-/-) とAtm ((-/-) のマウスのリンパ細胞形成に寄与する.
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