関連する実験動画
Updated: Apr 29, 2026

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Xenopus laevis as a Model to Identify Translation Impairment
Published on: September 27, 2015
10.3K
CPEBは,Xenopusの卵細胞の成熟過程で細胞質のポリアデニレーションを媒介する特異性因子です
1Worcester Foundation for Experimental Biology Shrewsbury, Massachusetts 01545.
Cell
|November 18, 1994
まとめ
サイトプラズミックポリアデニレーションには,RNA要素に結合する特定のタンパク質 (CPEB) が必要です. このタンパク質は,Xenopusの卵細胞の成熟過程におけるポリアデニレーションに不可欠です.
科学分野:
- 分子生物学は分子生物学である.
- 発達生物学 発達生物学について
- RNA 生物学 RNA 生物学
背景:
- サイトプラズマ的ポリアデニレーションは,Xenopus卵細胞の成熟期における母性mRNAの翻訳的活性化に不可欠である.
- このプロセスは,細胞質のポリアデニル化元素 (CPE) とAAUAAA六核酸配列に依存しています.
研究 の 目的:
- CPEと結合するタンパク質を特定し,特徴づけること.
- このCPE結合タンパク質 (CPEB) がシトプラズマのポリアデニレーションにおいて果たす役割を決定する.
主な方法:
- RNA親和染色体は,CPEBを豊かにするために使用されました.
- CPEBのcDNAを採取して分析した.
- 免疫低下と再構成の実験は,卵のエキスを用いて行われました.
主要な成果:
- 62 kDaのCPEBタンパク質が識別され,RNA認識モチーフを含み,Drosophila orb.との同質性を示した.
- CPEBは卵細胞に豊富に存在し,胚の後期段階では減少する.
- CPEBのリン酸化は,卵細胞の成熟期におけるポリアデニレーション誘導と一致する.
- CPEBの枯渇により,卵抽出物におけるポリアデニレーションが廃止され,CPEBの追加で回復した.
結論:
- CPEBは,Xenopusの卵細胞における細胞質ポリアデニレーションに必要な重要なタンパク質です.
- 卵細胞成熟中のCPEBのリン酸化は,ポリアデニレーションの活性化に関連しています.
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