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Updated: Feb 14, 2026

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孤立的缺席与F-box域中的FBXW7误解变异 de novo相关

Anees Muhammad¹, Mohammad Sadegh Shams Nosrati^2,3, Alireza Dostmohammadi⁴

¹Institute of Basic Medical Sciences, Khyber Medical University, Peshawar, Pakistan.

|February 13, 2026

概括

在一个患有缺席的孩子身上发现了一种新的FBXW7基因变异,扩大了FBXW7相关神经发育障碍的范围. 这种F-box域变体与WD40域变体相比,显示出较温和的表型.

科学领域:

遗传学和基因组学遗传学和基因组学
神经发育障碍神经发育障碍
分子生物学分子生物学

背景情况:

该FBXW7基因对于通过SCF E3无素化酶复合体进行蛋白质降解至关重要,影响关键调节性蛋白质.
功能丧失的FBXW7变体与神经发育障碍有关,大多数已知的致病变体位于WD40领域.
在其他FBXW7域 (如F-box域) 中,变体的作用仍然不太清楚.

研究的目的:

调查在患有早期儿童缺席的患者中发现的一种新型FBXW7变异.
描述F-box域变异在FBXW7.7中的病原性和结构影响.
扩大对FBXW7相关疾病的基因型和表型谱的理解.

主要方法:

进行了三外体序列测序,以确定遗传变异.
在 silico 工具被用于病原性预测和已识别的 FBXW7 变种的结构建模.
将患者的临床表型与之前报告的FBXW7相关疾病病例进行了比较.

主要成果:

一个新的 de novo missense 变种,c.926G>C;p.(Arg309Pro),在 FBXW7.7 的 F-box 域中被发现.
患者呈现出一种较温和的单独的表型,对药物反应的缺席发作,没有智力障碍.
结构建模表明蛋白质与SKP1的蛋白质结合亲和力受损,这表明SCF复合组件的破坏.

结论:

这些发现扩大了FBXW7相关疾病的基因型和表型谱.
FBXW7的F-box域中的变异可能导致比WD40域中更温和的神经现象.
在FBXW7中,特定域效应可能涉及不同的致病机制,影响神经发育结果.

关键词:

FBXW7FBXW7FFBXW7FF FBXW7FFF FBXW7FF 在F-box中使用F-box.在新的 de novo.早期发作的缺席性.错误的意义的变体神经发育障碍是一种神经发育障碍.

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