外框翻译在一个新的TBCE表型中拯救了一个功能丧失的变体
Peter Sparber1, Evgeniia Ulas2,3, Alexandra Filatova1
1Research Centre for Medical Genetics, Moscow, Russian Federation.
The Journal of clinical endocrinology and metabolism
|December 10, 2024
概括
一种新的,较温和的TBCE基因变异通过替代翻译导致独特的神经发育障碍,揭示了复杂的分子机制和斯拉夫人群体潜在的不足诊断.
科学领域:
- 遗传学和分子生物学
- 神经发育障碍 神经发育障碍
- 蛋白质生物化学 蛋白质生物化学
背景情况:
- 图布林特异性Chaperone E (TBCE) 基因中的致病变体与严重的神经发育障碍有关.
- 这些疾病包括低甲状腺功能减缓-失态 (HRD) 综合征,肯尼-卡菲综合征1型,以及随着肌缩和视力缩的渐进性脑病变.
研究的目的:
- 识别和表征一种与TBCE基因变异相关的新型,较温和的表型.
- 阐明这种新的TBCE相关疾病背后的临床和分子机制.
主要方法:
- 深度下一代测序 (NGS) 用于拼接分析.
- 对于TBCE检测和 luciferase 记者测试的翻译效率,西方涂抹.
- 免疫光显微镜,微管动力学研究,以及用于细胞和超结构分析的电子显微镜.
主要成果:
- 七名患者呈现出较温和的表型,包括肌缩,丸衰竭和轻度智力障碍,与NM_003193.5:c.100+1G>A变种相关.
- 变种c.100+1G>A导致拼接变化,但通过替代开放阅读框架翻译导致部分功能TBCE蛋白.
- 细胞分析显示,戈尔吉紧性和行为-肌素降解降低,但微管的动态正常.
结论:
- 复杂的分子机制,包括替代翻译,有助于较温和的TBCE相关表型.
- 这项研究确定了一种新的TBCE相关疾病,并建议潜在的诊断不足,特别是在斯拉夫人群体中,由于变体的频率.
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