一种新的染色体重塑复杂变体,dcPBAF,参与维持在分化神经元中的转录
Nataliya V Soshnikova1,2,3, Asya M Azieva3,4, Nataliya S Klimenko5
1Department of Transcription Factors, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.
Frontiers in cell and developmental biology
|November 30, 2023
概括
研究人员在分化神经元中发现了一种新的聚菌相关BAF (PBAF) 复杂变体,dcPBAF. 这种复合体,具有PHF10异型,缺乏BRD7,对于维持成熟神经元中的高基因转录至关重要.
科学领域:
- 分子生物学分子生物学
- 神经科学是一个神经科学.
- 染色体生物学 染色体生物学
背景情况:
- 聚菌相关的BAF (BRG1或BRM相关因子) (PBAF) 染色体重塑复合体对于哺乳动物的基因转录至关重要.
- 在增殖细胞中发现了正规的PBAF复合体,但在专门的细胞类型中可能存在不同的变体.
研究的目的:
- 在分化的神经元细胞中识别和表征新的PBAF复杂变体.
- 为了研究神经元特异性PBAF复合物的组成和功能.
主要方法:
- 在增殖神经母细胞与分化神经元中对PBAF复合组合的比较分析.
- 特定亚单元变化的鉴定,包括PHF10异型和BRD7.7缺失.
- 染色体免疫沉以评估新型复合物的与基因促进体的结合.
主要成果:
- 在已分化的成年神经元细胞中发现了一种新的PBAF变体dcPBAF.
- dcPBAF含有缺少N和C端域 (PHF10D) 的PHF10异型,并且缺少BRD7亚单元.
- 在分化的神经元中,dcPBAF结合到活跃转录的神经元特异性和管家基因促进体.
- 在人类神经元细胞中,含PHF10D的dcPBAF维持神经元特异性基因的高转录水平.
结论:
- 与增殖神经细胞相比,分化的神经元使用不同的PBAF复合体 (dcPBAF).
- PHF10D异型和BRD7的缺失定义了dcPBAF复合体.
- 在终端分化的细胞中,dcPBAF在维持神经元基因表达和功能方面发挥着至关重要的作用.
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