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Updated: May 13, 2025

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同卵性HOXC13 变体通过减少蛋白质稳定性引起纯毛发和指甲外皮发育不良

Virginia Clowes^1,2, Xiaolun Ma³, Hannah Maude²

¹North West Thames Regional Genetics Service Northwick Park and St Mark's Hospitals, London HA1 3UJ, UK.

|April 14, 2025

概括

纯毛和指甲外皮发育不良 (PHNED) 与HOXC13基因变异有关. 发现一种新型的同卵性变体p.Arg311Trp降低了HOXC13蛋白的稳定性,导致PHNED.

科学领域:

遗传学和分子生物学
发育生物学发展生物学
皮肤病学皮肤病学

背景情况:

纯毛和指甲外皮发育不良症 (PHNED) 是一种先天性疾病,影响头发和指甲发育.
像HOXC13这样的基因中的致病变体是已知的PHNED的原因.
之前的研究发现了HOXC13变体,破坏了蛋白质表达或DNA结合.

研究的目的:

在PHNED.患者中研究一种新型同卵性HOXC13变体 (c.931C>T,p.Arg311Trp) 的分子机制.
探索这种变异对HOXC13蛋白稳定性和转录活性的影响.

主要方法:

一个PHNED患者的遗传分析.
在体外过度表达测试.
在 silico 预测和计算建模.

主要成果:

一种罕见的同卵性变异,p.Arg311Trp,在HOXC13的homeobox域中被确定.
实验室试验表明,p.Arg311Trp降低了HOXC13蛋白质的稳定性.
计算模型预测了影响蛋白质稳定的结构变化.

结论:

这种p.Arg311Trp变体代表了与HOXC13相关的PHNED.的新机制.
降低HOXC13蛋白的稳定性,导致转录活性降低,与PHNED的发病有关.
这一发现扩大了对毛发和指甲发育障碍的遗传原因的理解.

关键词:

在HOXC13中,在 PHNED 中.临床遗传学临床遗传学皮肤外膜发育不良症是什么蛋白质的稳定性蛋白质的稳定性

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