RHOBTB2 变异 p.Arg511Gln 在婴儿中引起发育性和性脑病变 64 型:病例报告和热点变异分析
Qian Liu1, Feifei Li1, Qin Ruan1
1Department of Pediatrics, Taihe County People's Hospital, Fuyang, Anhui, China.
Molecular genetics & genomic medicine
|January 20, 2025
概括
在RHOBTB2的遗传变异导致DEE64,严重的神经障碍. 在Arg483和Arg511的热点变体可能会增加蛋白质的稳定性,为发育性和性脑病变 (DEE) 的疾病机制提供了洞察力.
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:
- 发育性和性脑病变 (DEEs) 是一组多样化的脑疾病.
- RHOBTB2基因变异与DEE64相关,具有早期发作的,发育迟缓,小头症和运动障碍.
- 在RHOBTB2中Arg483和Arg511的热点变体是常见的,但它们的功能影响是未知的.
研究的目的:
- 研究DEE64.4中RHOBTB2热点变体的作用机制.
- 分析特定RHOBTB2变体的结构和能量影响.
主要方法:
- 整体外体和桑格测序发现了一个新的RHOBTB2变种 (p.Arg511Gln).
- 文献综述汇编了关于DEE患者报告的60种RHOBTB2变异的数据.
- 使用Discovery Studio和AlphaFold进行的计算分析评估了蛋白质折叠的变体,自由能量和结构变化.
主要成果:
- 一名患有DEE64的患者携带了新的RHOBTB2变体p.Arg511Gln.
- 大约50%报告的RHOBTB2变种聚集在Arg483和Arg511.
- 高频变体 (p.Arg511Gln,p.Arg483His,p.Arg511Trp) 显示折叠自由能量减少,这表明蛋白质稳定性增加.
结论:
- RHOBTB2热点变体在DEE64病原发生过程中发挥着重要作用.
- 由于热点变异而导致的蛋白质稳定性的改变可能是DEE64.4的作用机制的基础.
- 对于具有暗示DEE64的临床特征的患者,建议进行RHOBTB2基因测试,以准确诊断和治疗.
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