ケラチン細胞骨格タンパク質は,タンパク質合成と上皮細胞の成長を調節する
Seyun Kim1, Pauline Wong, Pierre A Coulombe
1Department of Biological Chemistry, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Nature
|May 20, 2006
まとめ
ケラチン17は,中間のフィラメントタンパク質で,Akt/mTOR経路経由でタンパク質合成に影響を与えることで細胞成長を調節します. この発見は,細胞骨格 (cytoskeleton) を強調しています.
科学分野:
- 細胞生物学 細胞生物学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- 基本的なプロセスである細胞の成長は,厳格に規制されています.
- ラパミシン (mTOR) 信号伝達経路のAkt/哺乳類の標的は,タンパク質合成と生物の成長を制御するために重要である.
- 細胞の急速な成長は,組織修復などの生理学的プロセスに不可欠です.
研究 の 目的:
- 細胞成長の調節におけるケラチン17の役割を調査する.
- ケラチン17がタンパク質合成と細胞サイズに影響を与えるメカニズムを解明する.
- ケラチン17,14-3-3シグマ,およびAkt/mTOR経路との関係を調査する.
主な方法:
- ケラチン17発現の分析 傷ついた層状表皮質におけるケラチン17発現の分析.
- ネズミの皮膚のケラチノサイトでケラチンが欠けている研究 17.
- タンパク質翻訳,細胞サイズ,Akt/mTORシグナル伝達活動の評価.
- 14-3-3シグマ移転とmTOR活性化に関与するケラチン17の特定のアミノ酸残基の特定.
主要な成果:
- 組織修復中に誘発されるケラチン17は,14-3-3シグマと結合することで細胞成長を調節する.
- ケラチン17欠乏のケラチノサイトは,タンパク質翻訳が低下し,サイズが小さくなっており,これはAkt/mTOR信号伝達の低下と関連しています.
- ケラチン17の特定の残留物は,14-3-3シグマ核から細胞質への移転を媒介し,mTOR活性と細胞成長を刺激する.
結論:
- ケラチン17は,細胞の成長とサイズを調節する上で重要な役割を果たします.
- 中間繊維の細胞骨格は,タンパク質合成と細胞成長に影響を与えます.
- ケラチン17は14-3-3シグマを介して作用し,Akt/mTOR経路を調節し,細胞成長に影響を与えます.
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