酵母における芽部部位選択の遺伝的制御は,形態遺伝的経路を構成する一組の遺伝子産物によって行われます
1Department of Biochemistry and Biophysics, University of California, San Francisco 94143.
Cell
|June 28, 1991
まとめ
酵母細胞は,BUD1-BUD4という特定の遺伝子パターンを用いて,新しい細胞が育つ場所を制御します. これらの遺伝子は,芽が軸性か双極性かを決定し,細胞の発達を導く.
科学分野:
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
- 発達生物学 発達生物学とは
背景:
- 酵母細胞は,ハプロイド細胞の軸性,二重性細胞の双極性という異なる芽部部部位選択パターンを表している.
- 細胞形態変異の遺伝子制御を理解することは,発達生物学にとって極めて重要です.
研究 の 目的:
- 酵母における軸芽のパターンを調節する遺伝子を特定するために.
- 細胞形態変異と空間的なパターンを制御する遺伝的経路を解明する.
主な方法:
- 軸芽のパターンがない酵母変異体 (アルファ細胞) の分離と分析.
- 4つの鍵となる遺伝子の遺伝子解析:BUD1-BUD4.
主要な成果:
- BUD1 (RSR1) またはBUD2の変異は,すべての酵母細胞タイプでランダムな芽生えパターンを引き起こします.
- BUD3またはBUD4の突然変異は,すべての細胞タイプで双極性芽生えパターンを引き起こします.
- ランダムな基礎パターンは,BUD1/BUD2によって二極パターンに改変され,さらにBUD3/BUD4によって軸性パターンに改変されます.
結論:
- BUD1-BUD4遺伝子産物は,酵母細胞の形態変異を特定の部位に誘導する上で重要な役割を果たします.
- これらの遺伝子は,細胞分裂中の空間的なパターンのための遺伝プログラムを確立します.
- この研究は,酵母における細胞の極性および芽部部部位の選択を制御する遺伝的階層を明らかにしている.
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