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Updated: Jun 16, 2026

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Purification of Ubiquitinated p53 Proteins from Mammalian Cells
Published on: March 21, 2022
USP10は,p53をデウビキチン化することによって,p53の局所化と安定性を調節する
Jian Yuan1, Kuntian Luo, Lizhi Zhang
1Division of Oncology Research, Department of Oncology, Mayo Clinic, Rochester, MN 55905, USA.
Cell
|January 26, 2010
まとめ
USP10 デウビキチネートp53,Mdm2による分解を逆転させ,核の輸出. この細胞プラズマタンパク質酵素は,DNA損傷後のp53を安定させ,腫瘍の成長を抑制し,野生型のp53がんに新しい標的を提供します.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- 腫瘍学 腫瘍学
背景:
- p53タンパク質の安定性と局所化は,その腫瘍抑制活性に不可欠です.
- Mdm2媒介のユビキチネーションは,p53の主な調節体であり,その核輸出と分解を誘導する.
- ユビキチン化サイトプラズミックp53の運命は,ほとんど不明のままである.
研究 の 目的:
- USP10がp53.3を調節する役割を調査する.
- USP10がp53の安定性と局所化に影響を与えるメカニズムを解明する.
- 癌におけるUSP10の機能的意義を決定する.
主な方法:
- ウビキチン固有のプロテアゼアッセイ
- ウエスタン・ブロッティングは,タンパク質のレベルと変化を評価するためのものです.
- タンパク質の局所化を追跡するための免疫光.
- 細胞増殖測定法による細胞増殖測定法
- 透明細胞癌におけるUSP10発現の分析
主要な成果:
- USP10はサイトプラズマのデウビキチン化酵素で,p53.5からウビキチンを除去する.
- USP10はMdm2による核の輸出とp53.5の劣化を逆転させる.
- USP10は安定し,DNA損傷後に核に転位し,p53.3を活性化します.
- Thr42とSer337でのUSP10のATM媒介のリン酸化は,その転位と安定化を調節する.
- USP10は,野生型のp53細胞における腫瘍細胞の成長を抑制する.
- USP10は,野生型p53.5のクリアセル癌でダウンレギュレーションされています.
結論:
- USP10は,p53の安定性と局所化の新しい調節剤です.
- USP10 p53のデウビキチネーションは,Mdm2媒介の調節に対抗する.
- USP10 DNA損傷後のp53の活性化は,腫瘍の成長を抑制する.
- USP10は,野生型p53.3 がんに対する潜在的な治療標的を表しています.
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