プラズマ膜へのインポートインα分割は細胞内スケーリングを調節する
Christopher Brownlee1, Rebecca Heald1
1Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA.
Cell
|January 15, 2019
まとめ
パルミトイレーションによって改変されたインポートインαは,初期胚形成の間に核とスパインドルのサイズを細胞サイズでスケールする保存センサとして作用する. このメカニズムは細胞内構造が 変化する細胞サイズに適応することを保証します
科学分野:
- 細胞生物学
- 発達生物学
- 分子生物学
背景:
- 初期の胚形成には,細胞分裂があり,サブ細胞構造は異なる細胞サイズに適応しなければなりません.
- 核とスパインドルの大きさは 細胞の大きさに比例しますが 基本的な制御システムは不明のままです
研究 の 目的:
- 細胞内構造のスケーリングと細胞の大きさを開発中に調整する制御システムを特定する.
- 核とスピンデルの大きさのスケーリングにおけるインポルチンαの役割を調査する.
主な方法:
- クセノプスの卵抽出物と細胞のようなコンパートメントを使用して,インポートリンα標的を構成した.
- 核とスピンデルのサイズに対するインポートリンαパルミトイレーションレベルの影響を調査した.
- 保存を評価するために,ヒト細胞におけるインポートリンαパルミトイライションを試験した.
主要な成果:
- 核とスパインドルの大きさを調節するタンパク質との相互作用を調節します.
- 再構成実験では,再構成された胚形成を標的とした重要なスケーリング関係が示された.
- パルミトイレーションレベルに影響する阻害剤は,これらのスケーリング関係を変化させた.
結論:
- 表面積と体積を保持するセンサとして機能する.
- インポルチンαのパルミトイライションは,細胞内構造を細胞サイズにスケールするための重要なメカニズムである.
- この発見は 初期の発達期における 細胞の構成要素の調整について 洞察力を与えてくれます
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