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PTENのデウビキキチニル化と局所化は,HAUSP-PMLネットワークによって規制されています
Min Sup Song1, Leonardo Salmena, Arkaitz Carracedo
1Cancer Genetics Program, Beth Israel Deaconess Cancer Center and Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA.
Nature
|August 22, 2008
まとめ
核PTEN (染色体10で削除されたホモログのフォスファタゼとテンシン) の排除は癌を誘発する. 新しいPML-DAXX-HAUSPネットワークは,PTENデウビキキチニレーションと核エントリーを制御し,がんの進行に関する洞察を提供します.
科学分野:
- 腫瘍学 腫瘍学
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
背景:
- PTEN腫瘍抑制剤の核排除は,がんの進行と相関しています.
- 人間のがんにおけるPTENの異常な局所化を制御するメカニズムは不明である.
- PTENのユビキチテレーションは,その核-細胞プラズマ分割を調節する.
研究 の 目的:
- ヒトがんにおけるPTENのサブセルラー局所化を制御するメカニズムを解明する.
- PTENのデュビキチン化と核密輸の新たな規制者を特定する.
- PTENの区分化と癌におけるPML-DAXX-HAUSPネットワークの役割を調査する.
主な方法:
- プロミエロサイト性白血病タンパク質 (PML) 核体とヘルペスウイルスに関連したユビキチン特異タンパク質酶 (HAUSP/USP7) に関するPTENの局所化を調査した.
- 核PTENへの影響を評価するために,PML-RARalpha分解 (オールトランスレチノ酸,三酸化アルゼン) を標的とした薬物治療を使用しました.
- PTENのデウビキチン化と密輸の制御におけるPML,DAXX,HAUSPの相互作用を調べました.
- ヒト前立腺がんのサンプルでHAUSP発現とPTENの局所化を評価した.
主要な成果:
- 機能的なPML核機関は,PTENへのHAUSP活動に反対し,PTENの核への参入を維持しています.
- PTENは,PML機能の障害による急性プロミエロサイト性白血病において異常な局所化がある.
- PML-RARを劣化させる処理により,アルファは核のPTENの局所化を回復した.
- PMLは,アダプタタンパク質 DAXX.を介してHAUSPの活性に抵抗する.
- HAUSPは前立腺がんで過剰に発現し,PTEN核排除と相関しています.
結論:
- 新しいPML-DAXX-HAUSP分子ネットワークがPTENのデウビキチン化と密輸を制御しています.
- このネットワークが腫瘍発生因子によって混乱することは,がんにおけるPTEN核排除に寄与する.
- この研究は,PTENの細胞下区画化のための新しいデウビキチン化依存モデルを定義しています.
- このネットワークをターゲットにすることで,異常なPTEN局所化を持つがんの治療戦略を提供することができます.
関連する概念動画
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These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
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It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
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