人間のゲノム内のセンターメリック移行領域の構造と進化
Xinwei She1, Julie E Horvath, Zhaoshi Jiang
1Department of Genetics, Center for Computational Genomics and the Center for Human Genetics, Case Western Reserve University School of Medicine and University Hospitals of Cleveland, Cleveland, Ohio 44106, USA.
Nature
|August 20, 2004
まとめ
人間の周心膜の領域には,トランスポーズされたユークロマティックDNAが含まれており,主に丸で新しいトランスクリプトを形成します. これは,センターメリック移行領域の組織と進化を説明します.
科学分野:
- ゲノミクスゲノミクスとは
- 分子生物学は分子生物学である.
- 進化生物学の進化生物学について
背景:
- セントロメリック移行領域は,染色体の構造と機能にとって極めて重要です.
- 彼らの配列の文脈は,ゲノム配列の草稿を使用して解決することが困難です.
研究 の 目的:
- ヒトの周心帯域の構造と組成を分析する.
- これらの地域におけるDNA複製の起源と影響を理解する.
主な方法:
- 5メガデータベースのヒトの周心帯域の詳細な分析.
- 転写多様性および染色体間重複の検討.
- DNA転置イベントの進化史を追跡する.
主要な成果:
- ほとんどの染色体腕は,トランスクリプションの多様性が低下し,セントロメア近くの重複が増加するグラデントを示しています.
- セントロメリック移行領域の約30%は,トランスポーズされたユークロマティック遺伝子セグメントから派生しています.
- DNAの転移は,霊長類の進化の間,百万年に6〜7回の出来事で発生しました.
- 少なくとも28の新しいトランスクリプトは,エクソン抽出とシャッフリングによって発生し,多くは丸に特異的であった.
結論:
- ユークロマティックDNAの重複転移は,ペリセントロメリック領域を著しく形作る.
- このプロセスは新しいトランスクリプトを生成し,ゲノム進化に貢献します.
- 特定の周心膜の領域は,ユークロマティックDNAの統合のための好ましい場所として機能します.
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