TBP関連因子は,一般的に酵母における転写活性化には必要ありません
1Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|September 12, 1996
まとめ
TFIID TBP関連因子 (TAFs) は酵母成長には不可欠ですが,転写の活性化には一般的に必要とされません. TAFの枯渇は,いくつかのTATA-lessプロモーターに影響を与え,遺伝子調節における特定の役割を明らかにします.
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:
- TFIIDは,ユーカリオットRNAポリメラーゼII (Pol II) のトランスクリプションの重要なトランスクリプション因子である.
- TATA結合タンパク質 (TBP) とTBP関連因子 (TAF) で構成されています.
- TBPの役割は明確に定義されているが,TAFの機能は,特に体内では,理解が薄いままである.
研究 の 目的:
- 酵母におけるTAFの特定のインビボ転写機能を調査する.
- 特定の因子による基礎転写と活性化のためのTAFの必要性を決定する.
主な方法:
- 酵母におけるTAFの枯渇のための条件アレルを作成するために,新しいダブルシャットオフ方法を利用しました.
- TATA-lessを含む様々なプロモーターからの転写に対するTAF枯渇の影響を評価した.
- 既知の活性化剤による転写強化に対するTAF減少の効果を評価した.
主要な成果:
- TAFの枯渇は,TATA要素が欠けている特定のプロモーターからの転写を減少させた.
- 驚くべきことに,TAFの枯渇は,いくつかの活性化剤による転写強化に最小限の影響を及ぼしました.
- これは,TAFが酵母における転写活性化に普遍的に必要とされていないことを示唆しています.
結論:
- TAFは,特定のTATA-lessプロモーターからの転写を調節する役割を果たします.
- イーストにおけるアクティベーター媒介トランスクリプションのためのTAFの一般的要件は,以前に想定していたよりも少ない.
- 酵母転写における個々のTAFの正確な役割を明らかにするために,さらなる研究が必要である.
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