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使用in silico结构分析和表型数据来表征氨酸氧化酶变异的意义:一个PAH景观

Nastassja Himmelreich¹, Santiago Ramón-Maiques², Rosa Navarrete³

¹Dietmar-Hopp Metabolic Center and Centre for Pediatrics and Adolescent Medicine, University Children's Hospital, Heidelberg, Germany.

Molecular genetics and metabolism

|June 21, 2024

概括

这项研究重新分类了氨酸氧化酶 (PAH) 基因中的许多未知意义的变异,这对于基uria (PKU) 诊断至关重要. 将遗传指南与结构分析相结合,显著提高了变体分类准确度.

科学领域:

遗传学和基因组学遗传学和基因组学
生物化学生物化学
医学遗传学医学遗传学

背景情况:

基尿症 (PKU) 是一种与氨酸氧化酶 (PAH) 基因相关的遗传疾病.
很大一部分PAH变异是错误的改变,许多被归类为未知意义的变异 (VUS),使遗传风险评估复杂化.

研究的目的:

通过ACMG/AMP指南和ClinGen PAH VCEP标准重新评估836种错误PAH变异的致病性.
减少VUS的数量,提高PKU遗传风险评估的准确性.

主要方法:

将ACMG/AMP指南和ClinGen PAH VCEP标准应用于836种错误的PAH变体.
利用了变体注释工具 (弗兰克林,瓦索姆),对PAH进行了3D结构分析,并评估了拼接效应.
从22,962名PKU患者的综合表型数据进行变体重新分类.

主要成果:

成功重新分类309个VUS (37%) 可能致病性或致病性.
升级了370个可能致病的变体,并将一个可能良性的变体重新归类为可能致病的.
将VUS降低到6%,其中三个变体可能受到异常拼接的影响,一个致病变体显示出显著的拼接部位风险.

结论:

将ACMG/AMP指南与in silico结构分析和表型数据的整合有效地减少了误解VUSs.
这种全面的方法为PKU的遗传咨询提供了坚实的基础.
突出了代谢表型信息在PAH变异的精确变异治疗中的关键作用.

关键词:

过phenylalaninemia是指高尼拉氨基血症的情况.突变突变是一种突变.在PKU中,PKU是PKU.基尿症基尿症变体策划变体策划变量效应预测变量效应的预测.

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