c-Mycタンパク質の腫瘍性活性には,Maxによる二分化が必要である
1Growth Control and Development Laboratory, Imperial Cancer Research Fund, Lincoln's Inn Fields, London, England.
Cell
|January 29, 1993
まとめ
MycとMaxのタンパク質は,細胞の成長に不可欠です. この研究は,マックス結合がMycにとって不可欠であることを示しています.
科学分野:
- 分子生物学は分子生物学である.
- 腫瘍学 腫瘍学
- 遺伝学 遺伝学とは
背景:
- c-Myc (Myc) とMaxタンパク質は,基本ヘリックス・ループ・ヘリックス・ルシンのジッパー (b-HLH-LZ) モチーフでDNAを結合するダイマーを形成する.
- 細胞変容におけるMycホモジメとMyc-Maxヘテロジメの特定の役割を理解することは極めて重要です.
研究 の 目的:
- マックス・バインディングがマイクの変容活動に不可欠であるかどうかを調査する.
- MycホモジメとMyc-Maxヘテロジメの機能的役割を解明する.
- マイクとの関係でマックスの抑制および活性化機能を調査する.
主な方法:
- 遺伝子操作により,変異した二分化特異性を有するマイクとマックスミュータントを生成する.
- 補完的な突然変異体の共発は,変異活動の回復を評価する.
- HLH-LZ交換変異体の支配的負の効果の分析.
- Myc機能に対するワイルドタイプマックス抗体の用量依存研究.
主要な成果:
- Mycのマックスへの結合は,その変換活動に不可欠であり,Mycのホモダイマーは不活性である.
- 補完的なMycとMax変異体は,共発現時に変換活動を回復する.
- HLH-LZ交換変異体は,野生型のMyc.に支配的ネガティブな効果を発揮する.
- ワイルドタイプマックスは,抑制剤と活性剤の両方として作用し,Mycの機能に敵対する.
結論:
- マックス結合は,Myc媒介の細胞変容に不可欠である.
- マイクとマックスの二重化インターフェースは,それらの機能的結果を決定する.
- Maxは,Mycの活動を調節し,細胞成長制御に影響を与えるという二重の役割を果たしています.
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