CetZチューブリンのようなタンパク質は,古代の細胞の形状を制御する
Iain G Duggin1, Christopher H S Aylett2, James C Walsh3
11] Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK [2] The ithree institute, University of Technology Sydney, New South Wales 2007, Australia.
Nature
|December 24, 2014
まとめ
アーキエアには,チューブリンとFtsZに関連したCetZタンパク質があり,細胞の形状と運動性を制御するが,細胞分裂は制御しない. これは,細胞骨格の役割が真核生物の進化に先行し,微生物の泳ぎに不可欠であることを示唆しています.
科学分野:
- 微生物学 微生物学とは
- 細胞生物学 細胞生物学
- バイオケミストリー バイオケミストリー
背景:
- チューブリンとFtsZは,ユカリオットとバクテリアにおける重要な細胞骨格タンパク質であり,それぞれ異なる機能を持っています.
- 彼らの多様な役割の進化的起源は不明である.
- アーキエは,ユーカリオットとバクテリアの両方と特徴を共有し,初期の細胞骨格進化の洞察を提供します.
研究 の 目的:
- チューブリンとFtsZ.に関連した独特の家族であるアーキアのCetZタンパク質の構造と機能を調査する.
- 古代細胞生物学における CetZ の役割,特に細胞分裂と形状に関する理解.
主な方法:
- CetZタンパク質の構造を決定するX線結晶学.
- CetZ機能を評価するために,Haloferax volcaniiの遺伝子不活性化実験を行いました.
- CetZ細胞骨格構造のインビボ画像.
主要な成果:
- CetZタンパク質は,FtsZ/チューブリンスーパーファミリーの折りたたみを共有しています.
- CetZの無活性化は,H. volcanii. の細胞分裂に影響を与えませんでした.
- CetZ1は,プレート状の細胞を棒状の細胞に微分化するために不可欠であり,泳ぎの運動性にとって不可欠です.
- CetZ1は,細胞包膜の改造と棒形成に関与するダイナミックな細胞骨格構造を形成する.
- CetZ2はまた,H. volcanii. の細胞形状制御にも貢献しています.
結論:
- FtsZ/チューブリンスーパーファミリーの機能は,古代の細胞の形状ダイナミクスにまで及ぶ.
- これらのタンパク質の細胞骨格的な役割は,真核細胞の進化を先導した可能性がある.
- 微生物の棒の形状は,泳ぎの運動性を促進するために重要である可能性が高い.
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