Nature:新研究揭示长寿蛋白的秘密

2018-01-18 海北 MedSci原创

典型的成纤维细胞生长因子(FGFs)通过旁分泌或自分泌机制激活FGF受体(FGFRs),该过程需要硫酸乙酰肝素蛋白多糖(其作为FGFR活化的共受体)的协助来发挥作用。

典型的成纤维细胞生长因子(FGFs)通过旁分泌或自分泌机制激活FGF受体(FGFRs),该过程需要硫酸乙酰肝素蛋白多糖(其作为FGFR活化的共受体)的协助来发挥作用。

相反,内分泌的FGFFGF19FGF21FGF23)是调节各种组织中关键代谢过程的循环激素。 FGF19调节胆汁酸合成和脂肪生成,而FGF21刺激胰岛素敏感性,参与能量消耗和体重减轻。内分泌FGF通过FGFR传导信号时需要klothos的存在,klothos是具有串联糖苷酶结构域的细胞表面蛋白,在调节长寿和新陈代谢方面起着重要的作用。

最近,来自耶鲁大学医学院的研究人员描述了游离和配体结合的β-klotho的胞外区域的晶体结构,揭示了FGF21β-klotho的特异性的分子机制,并解释了FGFR如何以Klotho依赖的方式激活。

β-Klotho作为主要的邮编样受体,充当FGF21的靶向信号,并且FGFR可以作为介导细胞内信号传导的催化亚基起作用。研究人员的结构还显示了糖切酶糖苷酶如何进化成为调节代谢过程(包括降低血糖水平)的激素的特异性受体。

此外,研究人员还描述了具有增强的生物学活性的FGF21的激动型变体,并对与内分泌FGF相关的疾病的治疗药物的潜在开发提供了研究基础。


原始出处:

Sangwon Lee et al. Structures of β-klotho reveal a ‘zip code’-like mechanism for endocrine FGF signallingNature, 2018; DOI: 10.1038/nature25010


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    2018-12-17 liye789132251
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    2018-01-18 hhh678

    henhao

    0

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    2018-01-18 三生有幸9135

    学习一下谢谢分享

    0

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    2018-01-18 李东泽

    很好的学习材料.对临床和科研都有很大帮助作用.水滴石穿.不断积累.

    0

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    2018-01-18 sunfeifeiyang

    0

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