イーストのTATAボックスを含む遺伝子の識別と明確な規制
Andrew D Basehoar1, Sara J Zanton, B Franklin Pugh
1Graduate Program in Statistics, The Pennsylvania State University, University Park, PA 16802, USA.
Cell
|March 10, 2004
まとめ
研究者は,酵母におけるコンセンサスのTATAボックス配列,TATA (A/T) A (A/T) A (A/T) A (A/G) を特定した. TATAボックス遺伝子は,ストレス反応と制御された転写に関連しており,TATAの少ないプロモーターとは対照的です.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- バイオケミストリー バイオケミストリー
背景:
- TATAボックスは,真核細胞の転写制御の重要な要素である.
- その正確な順序と,ネイティブの文脈における機能的意義は,ほとんど未定のままである.
- プロモーター要素を理解することは,遺伝子調節を解読する鍵です.
研究 の 目的:
- SaccharomycesのゲノムにおけるネイティブのTATAボックスのコンセンサス配列を定義する.
- TATAボックスを含む遺伝子の機能的影響と特性を調査する.
主な方法:
- サッカロマイセスのゲノムに関するバイオ情報分析.
- 合意の配列を特定するために確立されたTATAボックス基準の適用.
- TATAボックスを含むプロモーターと,TATAを含まないプロモーターの比較分析.
主要な成果:
- コンセンサスのTATAボックス配列は,TATA ((A/T) A (A/T) A (A/T) A (A/G)) として決定されました.
- 約20%の酵母遺伝子はTATAボックスを持っています.
- TATAボックスを持つ遺伝子は,ストレス反応と有意に関連しており,より高い調節レベルを示しています.
- これらの遺伝子は,TATA-lessプロモーターと比較して,TFIIDよりもSAGA複合体を優先的に勧誘する.
結論:
- イーストの転写調節は双極性メカニズムを示し,潜在的にストレス誘発および構成遺伝子発現のバランスをとる.
- TATAボックスは,ストレス反応性および高度に制御された遺伝子を調節する上で明確な役割を果たします.
- 共同活性化剤複合体の差異的募集 (SAGA vs. TFIID) は,異なる規制戦略を強調しています.
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