ドロソフィラの筋肉形成のためのMADSドメイン転写因子D-MEF2の要求
B Lilly1, B Zhao, G Ranganayakulu
1Department of Biochemistry and Molecular Biology, University of Texas M.D. Anderson Cancer Center, Houston 77030.
Science (New York, N.Y.)
|February 3, 1995
まとめ
ミオサイト増強剤結合因子-2 (MEF2) の転写因子は,ドロソフィラの筋肉細胞の分化に極めて重要です. MEF2機能の喪失は,体,心臓,内臓の筋肉の発達を阻害し,肌形成におけるその重要な役割を強調する.
科学分野:
- 発達生物学 発達生物学について
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
背景:
- 肌細胞増強剤結合因子-2 (MEF2) タンパク質は,筋肉の発達に関与する転写因子です.
- MEF2因子は,筋肉特有の遺伝子発現に重要なDNA配列を結合させる.
- MEF2ファミリーは,脊椎動物とドロソフィラを含む種間で保存されています.
研究 の 目的:
- 筋肉の分化におけるMEF2の機能を調査する.
- MEF2が異なる筋肉タイプに共通する筋生成プログラムを制御しているかどうかを判断する.
主な方法:
- ドロソフィラMEF2遺伝子 (D-mef2) の機能喪失変異を生成した.
- D-mef2機能喪失胚の筋肉細胞の分化が観察されました.
主要な成果:
- ソマティック,心臓,内臓の筋肉細胞は,D-mef2機能喪失の胚で分化できませんでした.
- ミョボラストの特異化と位置付けは正常に発生し,差異化が影響を受けたプロセスであることを示す.
- MEF2は,複数の筋肉細胞タイプの分化に不可欠です.
結論:
- MEF2は,様々な種類の筋肉細胞の末端分化において重要な役割を果たします.
- MEF2によって調節される共通の肌の分化プログラムが,異なる筋肉の系統に存在する.
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