CREB規則の定義:転写因子規制領域の全ゲノム分析
Soren Impey1, Sean R McCorkle, Hyunjoo Cha-Molstad
1Vollum Institute, Oregon Health and Science University, Portland, OR 97239, USA. impeys@ohsu.edu
Cell
|December 29, 2004
まとめ
研究者は,クロマチンの占有率 (SACO) のシリアル分析と呼ばれる新しい方法を使用して,CREB転写因子の新しい標的を特定しました. これにより,CREB結合部位の包括的な地図が提供され,細胞機能の理解に不可欠です.
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
- 神経科学は神経科学である.
背景:
- CREB転写因子は,分化,生存,シナプス可塑性などの重要な細胞プロセスを調節する上で重要な役割を果たします.
- しかし,これらの多様な細胞応答を媒介するCREB標的の完全なセットは,大部分が特徴づけられていないままです.
研究 の 目的:
- CREBの標的遺伝子の包括的な識別のための新しい方法論を開発し,実装する.
- CREB結合部位のゲノム景観と,注釈された遺伝子および規制要素との関連を定義する.
主な方法:
- 染色体占有率の連続分析 (SACO) の開発は,染色体免疫降水 (ChIP) と改変されたSAGE (遺伝子発現の連続分析) のアプローチを組み合わせた技術です.
- SACOをネズミのPC12細胞に適用し,ゲノムシグネチャータグ (GST) のライブラリを生成する.
- 独特のゲノムロキーを特定し,CREB結合を確認するために,GSTのバイオ情報分析.
主要な成果:
- 約41,000のゲノムシグネチャータグ (GSTs) の識別が,ユニークなゲノムロケーションにマッピングされています.
- 複数のGSTでサポートされている6302のロシでCREBのバインディングを確認しました.
- アノテーションされた遺伝子 (40%),CpG島 (49%),および推定のcAMP応答要素 (CREs) (72%) との同位点の重複が顕著である.
- 数多くの双方向プロモーターと,CREBの結合部位に関連した新しいアンチセンセスのトランスクリプトの発見.
結論:
- SACO法は,全ゲノムにわたる転写因子結合部位をマッピングするための強力で包括的なアプローチを提供します.
- この研究は,メタゾア種の転写因子結合部位のこれまでで最も広範な定義を提示しています.
- この発見は,CREBが管理する規制ネットワークに関する重要な洞察を提供し,細胞の分化,生存,可塑性についての理解に影響を与えています.
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