在人类中,ERI1的零和错误突变会导致衰退的表型二分法
Long Guo1, Smrithi Salian2, Jing-Yi Xue3
1Department of Laboratory Animal Science, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, China; National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China; Center of Medical Genetics, Northwest Women's and Children's Hospital, the Affiliated Northwest Women's and Children's Hospital of Xi'an Jiaotong University Health Science Center, Xi'an 710003, China.
ERI1 (RNA处理中的关键酶) 的遗传变异会导致明显的骨和发育障碍. 误解变体会导致严重的发育不良,而零变体会导致较轻的智力和数字问题.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
背景情况:
- 酶 ERI1 (外核核酶1) 参与RNA处理,包括rRNA成熟和基因素mRNA周转.
- 人类ERI1功能障碍的精确生物学和医学影响尚不清楚.
研究的目的:
- 调查双基ERI1变异的临床和分子后果.
- 阐明 ERI1 变种类型与产生的表型之间的关系.
主要方法:
- 来自七个家族的八个个体的临床评估,具有双基ERI1变异.
- 在实验室中评估 ERI1 核糖核糖酶的活性.
- 对5.8SrRNA处理和基因组 mRNA降解的分析.
- 来自患者的诱导多能干细胞 (iPSC) 的生成和表征.
主要成果:
- 观察到一种表型二分法:错误的ERI1变体导致严重的脊髓皮质细胞功能障碍 (SEMD),而零变体导致轻度智力障碍和数字异常.
- 误解变异导致外核糖酶活动的丧失,损害了5.8SrRNA处理,并减少了基因组 mRNA 降解.
- 来自患者的iPSCs在体外表现出缺陷的冠状腺发育和骨模式基因的改变表达.
结论:
- 双等位基ERI1变异会导致人类多种疾病,误解等位基比零等位基的影响更为严重.
- 以ERI1为媒介的RNA代谢对人类骨发育和体生成至关重要.
- 这项研究发现了一种新的遗传疾病,并强调了错误基因与衰退条件下的零基因对错误基因的差异性致病性.
相关概念视频
Epistasis
Epistasis Analysis
Incomplete Dominance
Lethal Alleles
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Nonsense-mediated mRNA Decay
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Alternative RNA Splicing
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...


