ADAM19分裂了PTH受体,并与E型甲状腺素结合
Atakan Aydin1,2, Christoph Klenk3, Katarina Nemec1,3,4
1Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany.
Life science alliance
|February 8, 2024
概括
基因分析发现了一个截断的ADAM19基因变异,导致E型Brachydactyly (BDE). 这种突变破坏了ADAM19的功能.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 甲状腺直觉障碍型E (BDE) 的特征是手指缩短,骨形态变化,身高矮.
- 甲状腺激素样蛋白 (PTHrP) 信号传递与BDE病原发生有关.
- 副甲状腺激素受体 (PTHR1) 的细胞外域经历金属蛋白酶裂变.
研究的目的:
- 在一个小的血统中识别Brachydactyly类型E (BDE) 的遗传原因.
- 调查ADAM19作为PTHR1.1的分离酶的作用.
主要方法:
- 链接分析和全基因组测序被用来识别遗传变异.
- 使用野生型 (WT) 和突变的ADAM19进行了体外测试,以评估PTHR1裂变.
- 测量质谱法用于验证PTHR1.1.上的ADAM19裂痕部位.
主要成果:
- 在所有患有BDE的受影响个体中确定了一个截断的ADAM19等位基因.
- 转基因ADAM19将PTHR1切割到64-65氨基酸,而转基因ADAM19没有这样做.
- 通过ADAM19介导的PTHR1裂变改变了G蛋白信号传递 (增加了Gq,减少了Gs) 和增加了β-arrestin2招募.
结论:
- ADAM19 作为 PTHR1 的 sheddase 起作用,调节其信号传递.
- 在ADAM19中破坏PTHR1裂变的突变是可能导致E型甲状腺杆菌病的潜在原因.
- 除了BDE,ADAM19可能会影响其他PTHrP或PTH相关的功能.
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