微小管の振る舞いの新しい特徴は,in vivoで観察されました

E Schulze¹, M Kirschner

¹Department of Biochemistry and Biophysics, University of California, San Francisco 94143-0448.

Nature

|July 28, 1988

まとめ

生体細胞における微小管の動態は,動的不安定性を示すが,in vitroの行動とは異なる. 局所的なサイトプラズマ的要因は,微小管の組織と細胞形態変異に大きく影響する.

科学分野:

細胞生物学細胞生物学
細胞骨格のダイナミクス

背景:

微小管は,細胞の極性および形態発生に不可欠です.
微小管ポリメリゼーションは,成長状態と縮小状態の間の間接的な変換が稀な,インビトロでは動的不安定性を表します.
ダイナミック・インスタビリティにより,マイクロチューブルは細胞の配置を探索し,特定の形態を安定させることができます.

研究の目的:

生体細胞における微小管のダイナミクスの調節を調査する.
微小管の in vivo 振る舞いを,tubulinの in vitro 性質と比較するために.

主な方法:

単細胞の微小管を光で標識した微小管の直接観察.
個々の微小管のダイナミックな行動の分析.

主要な成果:

動的不安定性は,微小管の in vivo 振る舞いを大きく説明する.
微小管のダイナミクス in vivo とチューブリン特性の in vitro の間に大きな差異が観察されました.
局所的なサイトプラズマ的要因が微小管の動力学に強く影響していることが判明しました.

結論:

ダイナミック・インスタビリティは,微小管の行動における重要なメカニズムである.
サイトプラズマ的要因は,微小管の動態を調節する上で重要な役割を果たします.
これらの調節メカニズムは,細胞形態変異に重大な影響を及ぼします.

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