相关实验视频

Updated: Jan 6, 2026

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information

Published on: August 15, 2019

在结核性硬化-2中新型的框架移除致病变体表征使用外体测序和分子动力学模拟

Mahmood Fadaie¹, Sajjad Biglari², Hassan Vahidnezhad^3,4,5

¹Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

Biochemical genetics

|November 11, 2025

概括

研究人员发现了一种新的TSC2基因突变,导致结核性硬化综合体 (TSC). 这种移删除会影响结核蛋白的结构和功能,为潜在的mTOR途径疗法提供了洞察力.

科学领域:

遗传学是一个遗传学.
生物化学生物化学
计算生物学计算生物学

背景情况:

结核性硬化综合体 (TSC) 是一种罕见的遗传疾病,由TSC1或TSC2基因突变引起.
在TSC2的突变与更严重的症状和早期发病有关.
准确的基因诊断对于了解疾病机制和患者管理至关重要.

研究的目的:

在TSC2基因中识别和表征一种新的致病变体.
通过计算方法研究已识别的变异的结构和功能后果.
评估外基因组测序在诊断TSC和信息遗传咨询中的有用性.

主要方法:

使用exome测序 (ES) 来检测致病变体.
桑格测序和共分离分析证实了该变种.
使用GROMACS软件进行分子动力学 (MD) 模拟,以评估该变体对蛋白结构和功能的影响.
变种解释遵循美国医学遗传学与基因组学学院 (ACMG) 的指导方针.

主要成果:

在一个患有TSC症状的12岁男性患者的TSC2基因中发现了一种新的de novo框架转移删除变异 (c.3647_3651del,p.Leu1216Profs*16).
这种突变位于31号外子,符合ACMG的病原性标准.
MD模拟显示,这种突变破坏了GAP域,打破了键,减少了溶剂暴露,并改变了结核素的稳定性和结构动态.

结论:

外体序列测序是TSC诊断和遗传咨询的有效工具.
计算分析为TSC病变发生提供了宝贵的分子洞察力.
鉴定到的TSC2变体的影响表明潜在的治疗策略针对mTOR途径,如使用mTOR抑制剂.

关键词:

这就是TSC2的特点.外体序列排序是如何进行的模拟分子动力学模拟结核性硬化 - 结核性硬化结核性硬化综合体 2 蛋白质

更多相关视频

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

Published on: August 20, 2019

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease

Published on: April 4, 2018

相关概念视频

Point and Frameshift Mutations

Point and Frameshift Mutations

Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...

Cystic Fibrosis: Pathogenesis

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...