NFAT,Fos,JunからのDNA結合ドメインの構造は,DNAに特異的に結合しています
L Chen1, J N Glover, P G Hogan
1Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA. lchen@xta1200.harvard.edu
Nature
|March 24, 1998
まとめ
活性化されたT細胞の核因子 (NFAT) とAP-1タンパク質は,免疫遺伝子を活性化するためにDNAを結合します. 構造分析は,それらの複雑な相互作用を明らかにし,DNA認識のための溝を形成します.
科学分野:
- 分子生物学は分子生物学である.
- 免疫学 免疫学とは
- 構造生物学 構造生物学とは
背景:
- 活性化されたT細胞の核因子 (NFAT) とAP-1 (Fos-Jun) は転写因子である.
- 彼らは協力してDNAを結合し,免疫反応遺伝子を活性化します.
研究 の 目的:
- NFATとAP-1の協力性DNA結合の構造的基礎を解明する.
- 合成遺伝子の活性化のメカニズムを理解する.
主な方法:
- 2.7-Aの解像度のX線結晶学.
- NFAT,Fos,Jun,およびIL-2遺伝子プロモーターDNA断片の四次複合体の分析.
主要な成果:
- DNAと複合したNFAT,Fos,JunのDNA結合ドメインの詳細な構造が決定されました.
- NFATとAP-1の間の拡張されたインターフェースが観察されました.
- FosとDNAの曲折は,この相互作用を容易にする.
- 複合体は,DNAの15塩基対を認識するための連続した溝を形成します.
結論:
- 構造データは,NFATとAP-1がDNAにどのように結合しているかを明らかにします.
- この密接な関連は,免疫性遺伝子発現の協同活性化に極めて重要です.
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