人間の転写因子のDNA結合特異性
Arttu Jolma1, Jian Yan, Thomas Whitington
1Science for Life Center, Department of Biosciences and Nutrition, Karolinska Institutet, 141 83 Huddinge, Sweden.
Cell
|January 22, 2013
まとめ
研究者は,高通量SELEXとChIP配列を用いて,ヒトの転写因子 (TF) によって認識されるDNA配列を特定しました. この研究は,TF-DNA結合特異性とその基礎となるメカニズムに関する理解を大幅に拡大します.
科学分野:
- 分子生物学は分子生物学である.
- ゲノミクスゲノミクスとは
- バイオインフォマティックス
背景:
- 転写因子 (TF) は,特定のDNA配列に結合することによって遺伝子発現を調節する.
- 多くのヒトのTFが特定されているが,それらの正確なDNA結合特異性はしばしば不明である.
- TF-DNAの相互作用を理解することは,遺伝子調節を解読する上で極めて重要です.
研究 の 目的:
- 人間の転写因子の配列固有のDNA結合を体系的に分析する.
- ヒトTFの過半数について包括的な拘束力のあるプロフィールを生成する.
- TF-DNAの認識を左右する新しい決定因子とメカニズムを解明する.
主な方法:
- 高通量SELEX (指数的濃縮によるリガンドの体系的進化).
- ChIPシーケンシング (クロマチン免疫プレシピテーションシーケンシング).
- TFの結合特異性のためのコンピューティングモデルの開発.
主要な成果:
- 830の結合プロフィールを生成し,239の異なるTF結合特性を特徴付けました.
- 以前の研究と比較して,既知のTFの拘束的特異性のカバーを2倍にしました.
- 隣接する配列要素 (A/T豊富な区画) を特定し,TF-DNA結合におけるホモジマー方向性,間隔,塩基堆積の重要性を明らかにした.
結論:
- 側面配列やベーススタッキングの相互作用などの新しい機能を組み込んだ高度な結合モデルを開発しました.
- シーケンス固有のTF-DNA認識の理解を大幅に改善しました.
- 遺伝子調節とTF機能の研究に貴重なリソースを提供しました.
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