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与KIF21A相关的外围神经病变是由与TUBB3结合的损害所定义的

Nicholas A Borja¹, Mohammad Faraz Zafeer², Stephanie Bivona¹

¹Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA.

Journal of medical genetics

|December 6, 2024

概括

一种新的KIF21A基因变异导致渐进的外围神经病变和大脑异常. 这一发现将已知的KIF21A相关疾病扩展到眼外肌肉先天性纤维化 (CFEOM) 之外.

科学领域:

遗传学是一个遗传学.
神经科学是一个神经科学.
分子生物学分子生物学

背景情况:

基因KIF21A突变与外眼肌肉的先天性纤维化 (CFEOM) 有关,原因是分子内相互作用被破坏.
蛋白质KIF21A是神经元发育和功能必不可少的激素电机.

研究的目的:

描述一个新的 de novo KIF21A 变种及其相关的表型.
为了研究基底的分子机制,KIF21A变体对蛋白质结构和相互作用的影响.

主要方法:

基因测序以识别KIF21A变种. 基因测序用于识别KIF21A变种.
蛋白质建模用于预测结构变化.
同免疫沉试验用于评估KIF21A-TUBB3结合.

主要成果:

在一个患有外围神经病变,大脑质体低成形和偏的患者中,发现了一种新的异质合体的新错误变异,KIF21A p.Leu664Pro.
蛋白质建模表明了显著的结构变化,并预测了与TUBB3.3的结合受损.
在体外实验证实了减少KIF21A p.Leu664Pro与TUBB3.3的结合.

结论:

该KIF21A p.Leu664Pro变体定义了一个新的表型,包括渐进的外围神经病变,大脑异常,发育迟缓和.
破坏KIF21A-TUBB3相互作用是这种新型KIF21A相关疾病的潜在机制.

关键词:

出生,遗传和新生儿疾病和异常.眼部疾病眼部疾病人类遗传学人类遗传学神经系统疾病神经系统疾病

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