罕见遗传性疾病中的异常相分离和核细胞功能障碍
Martin A Mensah1,2,3, Henri Niskanen4, Alexandre P Magalhaes4
1Institute of Medical Genetics and Human Genetics, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
Nature
|February 9, 2023
概括
内在无序的蛋白质区域中的遗传变异可以破坏像核细胞这样的生物分子凝聚物. 这项研究通过改变蛋白质相分离并导致核细胞功能障碍, 将特定变异与罕见综合征联系起来.
科学领域:
- 遗传学
- 分子生物学
- 生物化学
背景情况:
- 数以千计的遗传变异与疾病有关, 但它们的功能影响往往是未知的, 特别是在内在无序的蛋白质区域内.
- 本质上无序的区域在关键的细胞过程中发挥作用,如相分离和生物分子凝聚物的形成,如核细胞.
研究的目的:
- 研究本质上失序的蛋白质区域中的疾病相关变异如何影响相分离,凝结物局部化和细胞功能.
- 为了确定手腕,多手指和骨形综合征的遗传原因.
主要方法:
- 在无序的蛋白质尾巴中列出超过20万个变体.
- 分析在转录因子中产生富含氨酸的变体.
- 评估变异对蛋白质相分离,核分裂和rRNA生物发生的影响.
主要成果:
- 在HMGB1中发现了de novo框架转移变异,导致手腕,多手指和骨缩综合征.
- 这些变体改变HMGB1相分离,增强其分离到细胞核中,并破坏细胞核功能.
- 确定了600多个框架转移,在各种蛋白质中产生富含氨酸的尾巴,许多与疾病相关的变异增强了核分裂并改变了rRNA生物发生.
结论:
- 疾病相关的变异在本质上有障碍的区域可以调节生物分子凝聚物的功能,导致罕见的综合征.
- 有大量的遗传变异可能会影响核细胞和其他凝聚物,导致人类疾病.
- 通过对HMGB1变异的分析,确定了支臂,多爪和腹综合征的特定遗传原因.
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