メニンの同じポケットは,MLLとJUNDの両方を結合しますが,転写に反対の効果があります
Jing Huang1, Buddha Gurung, Bingbing Wan
1Howard Hughes Medical Institute, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA.
Nature
|February 14, 2012
まとめ
メニンタンパク質はメニンのタンパク質です.
科学分野:
- バイオケミストリー バイオケミストリー
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- メニンは,多発性内分泌新生病1 (MEN1) と関連している腫瘍抑制タンパク質です.
- JUNDやMLL1のようなタンパク質とのメニンの相互作用は,細胞のプロセスにとって極めて重要です.
- メニンの多様なタンパク質の相互作用を理解することは,その腫瘍抑制機能の鍵です.
研究 の 目的:
- メニンのMLL1とJUNDとの相互作用の背後にある構造的メカニズムを解明する.
- メニンの異なるパートナーへの結合が,トランスクリプションの調節にどのように影響するかを理解する.
- MEN1と白血病発生におけるメンンの役割に関する構造的な洞察を提供するためです.
主な方法:
- X線結晶撮影は,人間のメンニーの構造を決定するために使用されました.
- 構造は,MLL1,JUND,およびMLL1-LEDGFヘテロダイマーを含む複合体および複合体で得られた.
- これらの構造の分析により,メンズ機能の結合モードと構造的基盤が明らかになった.
主要な成果:
- メニンは,MLL1とJUNDの両方のペプチドを同様に結合する深いポケットを持っています.
- JUNDへのメニンの結合は,JNK媒介のリン酸化を阻害することによって,JUNDの転写活動を抑制する.
- メニンは,MLL1のコファクターとして作用し,MLL1を染色体上のLEDGFに橋渡しすることで転写を促進します.
結論:
- メニンの構造的適応性は,多様なパートナーと相互作用し,異なった転写結果をもたらすことを可能にします.
- メニン-JUND相互作用は転写を抑制し,メニン-MLL1-LEDGF相互作用はそれを促進する.
- これらの発見は,腫瘍抑制と腫瘍生成の両方で分子アダプタとしてのメニンの役割を明確にします.
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