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相关概念视频

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Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
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De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
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Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
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相关实验视频

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Author Spotlight: Investigating mRNA Spatial Distribution in Drosophila Muscle Tissue
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在条纹肌肉中,FoxP1抑制MEF2A.

Sydney Steiman1,2,3, Tetsuaki Miyake1,2,3, John C McDermott1,2,3

  • 1Department of Biology, York University, Toronto, ON, Canada.

Molecular and cellular biology
|March 14, 2024
PubMed
概括

转录因子FOXP1与MEF2A相互作用,抑制其在肌肉发育和心肌细胞生长中的活性. 这种相互作用对于调节细胞分化和防止病态基因重新激活至关重要.

关键词:
这就是FOXP1P.在MEF2中,MEF2是MEF2.肌肉发育 (Myogenesis) 是一种肌肉发育的过程.这是心肌细胞 (cardiomyocyte).不同化的差异化差异化.酸化的方法是光化.

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科学领域:

  • 分子和细胞生物学分子和细胞生物学
  • 发展生物学 发展生物学
  • 心血管研究研究心血管研究

背景情况:

  • 肌细胞增强因子2 (MEF2) 蛋白调节各种脊椎动物的发育,生理和病理过程.
  • 了解MEF2A的蛋白相互作用至关重要,因为它参与了许多生物功能.

研究的目的:

  • 为了全面描述MEF2A互动组.
  • 研究MEF2A与转录抑制剂FOXP1.1.的相互作用的功能后果.

主要方法:

  • 使用基于纳米体的亲和力净化与质谱法 (AP-MS) 策略相结合.
  • 采用GFP标记的MEF2A和GBP纳米体,用于从肌源性溶解物中捕获MEF2A蛋白质复合物.
  • 进行液体染色学-质谱/质谱 (LC-MS/MS) 用于蛋白质组分析和确定相互作用体.

主要成果:

  • 确定FOXP1是MEF2A相互作用因子,在增殖肌细胞中与MEF2A共存,在分化时相互作用减少.
  • 证明异胎FOXP1表达抑制了MEF2A驱动的肌源性记者基因,并延迟了内源性肌源素诱导.
  • 表明FOXP1的枯竭增强了MEF2A的交换活化和肌原蛋白的表达;这种相互作用被保留在心肌细胞中,在心肌细胞中,FOXP1的枯竭促进了缩.

结论:

  • FOXP1作为MEF2A活动的负调节剂,防止过早的肌源性祖先分化.
  • FOXP1限制了MEF2A功能,可能会阻止胚胎基因表达的重新激活,例如心肌细胞缩.
  • MEF2A-FOXP1相互作用在肌肉发育和心脏病理生理学中起着重要作用.