RNF12は,X染色体不活性化X染色体不活性化のXエンコードドース依存活性化剤です
Iris Jonkers1, Tahsin Stefan Barakat, Eskeatnaf Mulugeta Achame
1Department of Reproduction and Development, Erasmus MC, University Medical Center, 3000 CA Rotterdam, The Netherlands.
Cell
|December 1, 2009
まとめ
研究者らは,E3ユビキチンリガゼであるRNF12をX染色体不活性化 (XCI) の主要な活性化剤として特定した. その用量は,胎盤哺乳類のXCI開始に影響を与え,遺伝子用量補償に影響を与えます.
科学分野:
- 遺伝学 遺伝学とは
- エピジェネティクス エピジェネティクス
- 哺乳類の発達について
背景:
- X染色体不活性化 (XCI) は,胎盤哺乳類の性別間の遺伝子配分を均等にする.
- XCIの開始は,X-エンコードされた因子によって制御されるストキャスティックなプロセスです.
研究 の 目的:
- X染色体不活性化の新規活性化剤を特定する.
- XCIの開始におけるRNF12の役割を明らかにする.
主な方法:
- マウスとヒトのRNF12の過剰発現は,マウスとマウスの胚性幹細胞 (ESC) に見られる.
- RNF12トランスジェニック細胞とRnf12ヘテロジゴスESCにおけるXCI開始の分析.
- RNF12のオープン・リーディング・フレームの整合性と表現レベルの評価.
主要な成果:
- RNF12コピーの増加は,男性ESCにおけるXCI,女性ESCにおけるバイアレルXCIを誘発した.
- RNF12のXCI誘発活動は,その開いた読み取りフレームと表現レベルに依存していた.
- XCIの開始は,雌性ヘテロジゴスRnf12 (((+/-) ESCの差異化において減少した.
結論:
- RNF12は重要なXCIアクティベータとして特定されています.
- RNF12は,XCIのカウントとイニシアチブにおいて,用量依存的な役割を果たします.
- この発見は,X染色体用量補償の分子機構に関する新しい洞察を提供します.
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