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Pulmonary Embolism III: Nursing Management
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活性クロマチンの痕跡は,C. elegansの核におけるヘテロクロマチンの空間的結合を誘導する
Daphne S Cabianca1, Celia Muñoz-Jiménez2, Véronique Kalck1
1Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.
Nature
|May 24, 2019
まとめ
科学者はC.elegansのゲノム組織を 制御する新しい経路を発見しました これは,微分化細胞にとって不可欠な,ユークロマチンのCBP-1/p300を隔離するMRG-1タンパク質を含みます.
科学分野:
- 細胞生物学
- 遺伝学
- 分子生物学
背景:
- エウクロマチンとヘテロクロマチンのゲノム組織は遺伝子発現に不可欠です.
- ヘテロクロマチンは核の周辺に固定され 細胞の完全性を保ちます
- ヒストンH3ライシン9メチル化 (H3K9me) はヘテロクロマチンを標識し,そのアンカリングを媒介する.
研究 の 目的:
- 分類されたC. elegans組織における第二のヘテロクロマチン分離経路に関与する因子を特定する.
- MRG-1 がクロマチンの組織化に寄与するメカニズムを解明する.
主な方法:
- cec-4変異の背景におけるRNA干渉 (RNAi) スクリーン
- 特定の遺伝子 (MRG-1,CBP-1,ATF-8) の枯渇と過剰発現の実験
- ヘテロクロマチンの局所化とヒストンの改変の分析 (H3K27ac).
主要な成果:
- MRG-1は腸内細胞にヘテロクロマチンを固定するのに不可欠であると特定されました.
- MRG-1はユークロマチンと結合し,CBP-1/p300を隔離して間接的に作用する.
- mrg-1; cec-4変異体におけるCBP-1/p300またはATF-8救済ヘテロクロマチン分離の枯渇.
- MRG-1によるCBP-1/p300結合は,分化細胞において重要な役割を果たします.
結論:
- クロマチンの空間的組織は,ユークロマチンのCBP-1/p300の直接の周核結合と活性結合の両方に依存しています.
- MRG-1媒介によるCBP-1/p300保持は,異なったC. elegans組織におけるクロマチン組織にとって重要な経路である.
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