組み合わせトランスクリプション回路の進化:酵母菌における事例研究
Annie E Tsong1, Mathew G Miller, Ryan M Raisner
1Department of Biochemistry & Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA.
Cell
|November 19, 2003
まとめ
遺伝子の調節における進化的変化は,生物の複雑性を引き起こす. Candida albicansとSaccharomyces cerevisiaeを比較すると,異なった交配型の規制回路が明らかになり,異なる進化経路にもかかわらず,保存された出力を強調します.
科学分野:
- 進化生物学の進化生物学について
- 分子生物学は分子生物学である.
- 菌類学 菌類学とは
背景:
- 遺伝子調節の可塑性は,進化の複雑性にとって極めて重要です.
- 転写回路の理解は,進化の多様性についての洞察を提供します.
- Candida albicansとSaccharomyces cerevisiaeは,1億から8億年前に分離した.
研究 の 目的:
- カンディダ・アルビカンスの交配型を調節する転写回路を決定する.
- この回路をSaccharomyces cerevisiaeの回路と比較してみましょう.
- 長い時間スケールにおける遺伝子調節における進化的変化を調査する.
主な方法:
- 転写制御回路の比較分析.
- 重要な調節性遺伝子の特定とその修正.
- イーストの分岐に基づく進化の時間スケールの評価.
主要な成果:
- C. albicansとS. cerevisiae. の間の交配型規制回路の有意な差異が観察されました.
- 交配型の陽性調節体はS. cerevisiaeでは失われ,C. albicans.では保持された.
- S. cerevisiaeの回路の修正は,損失を補償し,回路の出力を保持しました.
- C. albicansのユニークな規制層は,哺乳類の宿主環境への適応を反映している可能性が高い.
結論:
- 進化の圧力により,遺伝子調節ネットワークの有意な可塑性が生じます.
- 保存された回路の出力は,異なる規制メカニズムによって達成できます.
- ホストと病原体の相互作用などの環境適応は,ユニークな規制層を形成します.
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