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20種以上の哺乳類の進化を促進する.
Diego Villar1, Camille Berthelot2, Sarah Aldridge1
1University of Cambridge, Cancer Research UK Cambridge Institute, Robinson Way, Cambridge, CB2 0RE, UK.
Cell
|January 31, 2015
まとめ
哺乳類の調節進化は,しばしば祖先のDNA抽出から,急速な増強剤の変化を示しますが,肝臓のプロモーターは保存されています. これは,哺乳類のゲノム機能遺伝学に関する重要な洞察を明らかにします.
科学分野:
- ゲノミクスゲノミクスとは
- 進化生物学の進化生物学について
- 分子生物学は分子生物学である.
背景:
- 哺乳類の放射線は,特に非コーディング領域の急速なゲノム変化と一致しました.
- 哺乳類の調節進化の包括的な理解は欠けている.
研究 の 目的:
- 哺乳類の肝臓におけるプロモーターとエンハンスターの進化動態を調査する.
- 多様な哺乳類種における規制の進化を駆動するメカニズムを特定する.
主な方法:
- H3K27アセチル化とH3K4トリメチル化のプロファイリングゲノム濃縮.
- 6つの異なるオーダーから20種の哺乳類の比較分析.
主要な成果:
- 増強剤の急速な進化は,哺乳類のゲノムの一般的な特徴である.
- ほとんどの新しい増強剤は,重複要素の拡張ではなく,祖先のDNAの拡張から発生します.
- 肝臓プロモーターは,研究された哺乳類の種全体で大きく保存されています.
- 最近進化した増強剤は,ポジティブ・セレクション下で遺伝子と関連付けられる.
結論:
- Enhancerの進化は,主にDNAのエクサプテーションを通して,哺乳類の規制的適応の主要な原動力である.
- プロモーター保存は,肝臓の重要な機能のための安定した規制の枠組みを示唆しています.
- この研究は,規制的適応を注釈し,哺乳類の進化における機能的遺伝学を理解するための枠組みを提供します.
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