トランスクリプション延長因子は,暗号サイトからのトランスクリプションの開始を抑制します
Craig D Kaplan1, Lisa Laprade, Fred Winston
1Department of Genetics, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA.
Science (New York, N.Y.)
|August 23, 2003
まとめ
Spt6タンパク質は,遺伝子転写中に正常な染色体構造を維持するために不可欠です. Spt6の変異により,コード領域内の異常な遺伝子活性化が可能になり,エラーを防止する役割が強調されています.
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
- クロマチン生物学 クロマチン生物学
背景:
- トランスクリプションの延長がクロマチンの構造を変更することが知られている.
- Saccharomyces cerevisiae Spt6のタンパク質は,転写延長とクロマチン構造の両方に関与しています.
- Spt6の正確な役割を理解することは,遺伝子調節を理解するために不可欠です.
研究 の 目的:
- 転写延長とクロマチン構造におけるSaccharomyces cerevisiae Spt6の機能を調査する.
- spt6変異が転写の開始とクロマチンの組織に及ぼす影響を決定する.
- 異変転写開始を抑制するSpt6の役割を明らかにする.
主な方法:
- Saccharomyces cerevisiae.のspt6変異株の分析について
- コーディング領域内での異常なイニシアチブのためのアッセイを使用してトランスクリプションイニシアチブの評価.
- マイクロコッカルヌクレアゼ感受性アッセイは,クロマチンの構造を検査する.
- RNAポリメラーゼIIの変異性不活性化を含む遺伝子解析.
主要な成果:
- Spt6変異体は,コード領域内から異なった転写開始を示す.
- spt6変異体の転写されたクロマチンは,マイクロコックスの核酵素に対する過敏性を示しています.
- この過敏性は,RNAポリメラーゼIIの不活性化によって軽減されます.
- Spt16とヒストンH3のような他の要因も,この規制制御に寄与する.
結論:
- Spt6は,転写延長中に正常な染色体構造を維持する上で重要な役割を果たします.
- Spt6は,暗号的プロモーターからの転写開始を抑制する機能を持っています.
- spt6変異体における異常な転写開始とクロマチンの変化は,転写延長における欠陥と関連しています.
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