イーストのTATA結合因子TFIIDをコードする遺伝子SPT15は,体内での正常な転写開始には必要である
D M Eisenmann1, C Dollard, F Winston
1Department of Genetics, Harvard Medical School, Boston, Massachusetts 02115.
Cell
|September 22, 1989
まとめ
TATA結合因子TFIIDをコードするSPT15遺伝子の変異が遺伝子転写を変化させることが判明しました. この重要な転写因子は,酵母菌の成長,交配,および胞子形成に不可欠であり,多数の遺伝子に影響を与えます.
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
- イースト生物学 イースト生物学
背景:
- Saccharomyces cerevisiaeの遺伝子調節メカニズムを調査する.
- 遺伝子発現の制御における転写因子の役割を理解する.
- SPT15遺伝子は,以前,変異遺伝子転写に対するサプレッサースクリーンで特定されていました.
研究 の 目的:
- SPT15遺伝子を特定し,特徴づけるために.
- 転写開始におけるSPT15遺伝子産物の機能を決定する.
- SPT15変異の本質性とプレオトロピク効果を評価する.
主な方法:
- 挿入変異の抑制剤としてのSPT15変異の分離.
- 分子クローニングとSPT15遺伝子の遺伝子解析.
- spt15変異株のフェノタイプ分析,成長,交配,および胞子化アッセイを含む.
主要な成果:
- SPT15遺伝子は,TATA結合因子 TFIID をコードする.
- TFIIDの変化 (spt15変異経由) は,体内での転写開始に影響する.
- TFIIDは酵母菌の成長に不可欠であり,spt15変異種は成長が遅い,交配と胞子化に欠陥がある.
結論:
- TFIIDは,Saccharomyces cerevisiaeの生命力にとって不可欠な転写因子である.
- TFIIDは,体内での転写開始を調節する上で重要な役割を果たします.
- SPT15の変異は,基礎転写を超えてTFIIDのプレオトロプ的役割を明らかにします.
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