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nNOS-シントロフィン複合体の構造によって明らかにされたPDZドメインの架構の予期せぬモード
B J Hillier1, K S Christopherson, K E Prehoda
1Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94143, USA.
Science (New York, N.Y.)
|April 30, 1999
まとめ
ニューロンの酸化窒素合成酵素 (nNOS) PDZドメインは,典型的なモチーフではなく,異常なベータ指相互作用によってシントロフィンと結合する. この発見は,細胞ネットワークにとって極めて重要な新しいタンパク質相互作用機構を明らかにしています.
科学分野:
- 分子生物学は分子生物学である.
- 神経科学は神経科学である.
- 構造生物学 構造生物学とは
背景:
- PDZドメインは,重要なタンパク質相互作用モジュールである.
- ニューロン酸化窒素合成酵素 (nNOS) は,シナプス後密度タンパク質95とシントロフィンと相互作用する.
- 典型的なPDZドメインの相互作用には,カルボキシル端末モチーフが含まれています.
研究 の 目的:
- nNOS PDZドメインとシントロフィンとの相互作用の構造的基礎を解明する.
- 非正規のPDZドメイン結合メカニズムを調査する.
- PDZドメインを含むタンパク質ネットワークの組み立てを理解する.
主な方法:
- nNOS-シントロフィンPDZ複合体のX線結晶学. nNOS-シントロフィンPDZ複合体のX線結晶学. nNOS-シントロフィンPDZ複合体のX線結晶学.
- タンパク質とタンパク質の相互作用の構造分析.
- PDZドメインの相互作用モードのバイオ情報分析.
主要な成果:
- nNOSとシントロフィンPDZドメインは,頭から尾までの異常な線形複合体を形成します.
- nNOS PDZドメインは,ベータヘアピン"指"を使用してシントロフィンPDZドメインを結合します.
- この相互作用はペプチドリガンドを模倣するが,カルボキシル末端を欠き,代わりにベータターンを利用する.
結論:
- PDZドメインは,さまざまな非正規の相互作用モードに参加することができます.
- nNOS-シントロフィン相互作用は,代替 PDZ ドメイン アセンブリのための構造的パラダイムを提供します.
- これらの相互作用を理解することは,複雑な細胞タンパク質ネットワークの解読の鍵です.
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