非对称的FGF受体二元化:对FGF23生物学和药物发现的影响
Mohammed S Razzaque1, Moosa Mohammadi2
1Department of Medical Education, School of Medicine, The University of Texas Rio Grande Valley, Edinburg, Texas, United States.
纤维细胞生长因子23 (FGF23) 需要αKlotho和肝酸硫酸蛋白糖 (HSPGs) 来激活FGF受体 (FGFRs) 进行矿物质和维生素D调节. 结构分析显示了一个不对称的FGF23-FGFR-αKlotho-HS组件驱动受体激活.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 内分泌学 在内分泌学.
背景情况:
- 纤维细胞生长因子23 (FGF23) 是一种调节酸盐和维生素D代谢的关键激素.
- FGF23信号需要αKlotho和肝素硫酸蛋白质糖 (HSPG) 作为核心受体来激活FGF受体 (FGFR).
- 了解FGF23信号传递的精确结构组合对于破译其在矿物质稳态中的作用至关重要.
研究的目的:
- 阐明FGF23信号组合的结构机制,其中包括FGFR,αKlotho和HSPG.
- 研究αKlotho和HSPG在FGF23介导的受体激活和二分化中的作用.
- 探索因受体异体化而产生的信号多样性的潜力及其对FGF23相关疾病的影响.
主要方法:
- 使用冷电子显微镜来确定FGF23信号复合体的高分辨率结构.
- 结构分析的重点是不对称的 1:2:1:1 FGF23-FGFR-αKlotho-HS组件.
- 该研究模拟了FGFR链的顺序招募和核心受体在受体二分化中的作用.
主要成果:
- FGF23信号传输涉及一个不对称的组合,其中αKlotho与FGF23和一个初级FGFR (FGFRP) 形成三重体.
- 肝酸硫酸蛋白质甘 (HSPGs) 促进了二次FGFR (FGFRS) 的招募,导致不对称的受体二分化.
- 该模型表明脏FGFRs (FGFR1c,FGFR3c,FGFR4) 之间的潜在异构化,这意味着酸盐和维生素D调节中的信号多样性.
- 特定于脏的HSPG结构可能与脏αKlotho合作,以定位FGF23信号.
结论:
- 拟议的FGF23信号组件为FGF23介导的信号传导提供了详细的结构框架.
- 这种结构性理解可能有助于开发针对酸盐和维生素D代谢障碍的向治疗方法.
- 这些发现突出了αKlotho和HSPG在FGF23受体激活和信号特异性中的关键,协调的作用.
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