ErbB2は,自己抑制された無脊椎動物の表皮成長因子受容体に似ています
Diego Alvarado1, Daryl E Klein, Mark A Lemmon
1Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, 809C Stellar-Chance Laboratories, 422 Curie Boulevard, Philadelphia, Pennsylvania 19104-6059, USA.
Nature
|September 1, 2009
まとめ
孤児受容体チロシンキナーゼErbB2 (HER2) は,ドロソフィラメラノガスターEGFR (dEGFR) に似たリガンドによって調節されることがあります. この発見は,ErbB2が自己抑制を欠いているという考えに異議を唱え,がんに対する新たな治療標的を提供している.
科学分野:
- 分子生物学は分子生物学である.
- 構造生物学 構造生物学とは
- がん研究 がん研究
背景:
- ErbB2 (HER2) は腫瘍性受容体チロシンキナーゼであり,がんにおける重要な治療標的である.
- 以前のモデルでは,ErbB2の腫瘍性シグナル伝達は,他のErbB受容体に存在する自己抑制性結合の欠如に起因すると示唆されていた.
- ErbB2のユニークなシグナリングと規制の構造的基盤は不明のままでした.
研究 の 目的:
- ErbB2シグナリングの構造と規制メカニズムを調査する.
- ErbB2の調節を,その最も近い構造的親戚であるドロソフィラ・メラノガスター EGFR (dEGFR) と比較してみましょう.
- ErbB2.2の自己抑制モデルを再評価する.
主な方法:
- ErbB2 と dEGFR の比較構造分析.
- リンガンによるdEGFRの調節を研究するための遺伝的および生化学的分析.
- dEGFRの結晶構造の決定.
主要な成果:
- dEGFRは,カノニカル・テッダーがないにもかかわらず,成長因子リガンドによって緊密に調節されます.
- 異なる領域間相互作用のセットは,結合していないdEGFRを不活性状態に維持します.
- これらの自己抑制相互作用はErbB2で保存され,拡張され,自己抑制の欠如と矛盾する.
結論:
- ErbB2の自己阻害は存在し,dEGFRに似たリガンドによって制御される可能性が高い.
- ErbB2が自己抑制を欠くという確立されたモデルに異議を唱える.
- 発見は,ErbB2の調節とErbB2駆動がんに対する潜在的な治療戦略に関する新しい洞察を提供します.
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