bHLH TCF4蛋白质的分子特性作为一个内在无序的枢纽转录因子
Nikola Sozańska1, Barbara P Klepka2, Anna Niedzwiecka2
1Department of Biochemistry, Molecular Biology and Biotechnology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, Wrocław, 50-370, Poland.
Cell communication and signaling : CCS
|March 28, 2025
概括
转录因子4 (TCF4) 是一种大型,内在无序的蛋白质. 它的bHLH域将其固定在DNA上,而无序的区域与其他伙伴相互作用,表明其作为枢纽转录因子的作用.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 遗传学 是一个遗传学.
背景情况:
- 转录因子4 (TCF4) 对于胚胎发生和发育至关重要.
- TCF4中的突变与严重的神经系统疾病有关.
- 对于TCF4在其bHLH域之外,存在有限的结构数据.
研究的目的:
- 阐明全长TCF4的分子结构和特性.
- 为了比较TCF4的apo和holo (DNA结合) 形式.
- 了解TCF4内在无序区域 (IDR) 的作用.
主要方法:
- 再组合蛋白的表达和净化.
- 生物物理技术:光极化 (FP),电泳运动移位试验 (EMSA),光相关谱 (FCS) 用于DNA结合.
- /交换质谱 (HDX-MS),沉积速度分析超离心 (SV-AUC),循环二元化 (CD) 用于结构和动态分析.
主要成果:
- TCF4二聚体是最大的内在失序蛋白 (IDP) 之一.
- 这种蛋白质在很大程度上是无序的,只有bHLH域稳定地折叠.
- 通过bHLH域的DNA结合会影响蛋白质稳定性和bHLH动态,但不会影响整体疾病.
结论:
- 该bHLH域充当TCF4.4的DNA结合.
- TCF4的结构主要由IDRs组成,表明它作为枢纽转录因子的作用.
- IDRs可能会调解与基因特异性合作伙伴的相互作用,以实现调节功能.
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