利用T2T组件来解决参考基因组间隙中的罕见和病原性逆转
Kristine Bilgrav Saether1,2, Jesper Eisfeldt3,2,4, Jesse D Bengtsson5
1Department of Molecular Medicine and Surgery, Karolinska Institute, 171 76 Stockholm, Sweden.
Genome research
|November 1, 2024
概括
检测染色体逆转很困难,但长读基因组测序与T2T-CHM13参考基因组相结合,显著提高了诊断罕见疾病的准确性.
科学领域:
- 基因组学就是基因组学.
- 人类遗传学 人类遗传学
- 分子诊断学 分子诊断
背景情况:
- 染色体逆转 (INVs) 是一个重要的结构变异类别,通常难以通过短读序列检测.
- 逆转可以通过破坏基因或改变调节元件来引起遗传疾病.
- 目前的短读基因组测序 (srGS) 方法只能解决大约70%的可见反转.
研究的目的:
- 评估长读基因组测序 (lrGS) 的有效性,以解决染色体逆转.
- 评估不同人类参考基因组对逆转检测的影响.
- 突出综合参考基因组对于临床诊断的重要性.
主要方法:
- 使用irrgs (n=9) 和srgs (n=3) 分析了12个染色体逆转.
- 参考无学分析以确定未绘制区域中具有断点的反转.
- 使用T2T-CHM13,GRCh37,GRCh38和灵长类动物基因组进行比较的基因组学.
主要成果:
- 在12个倒置中,有9个成功解决.
- 由于在标准人类参考中缺少断点区域,四个反转需要参考不可知分析.
- 使用T2T-CHM13识别了一种破坏EHMT1的新型INV9,与Kleefstra综合征一致.
- 在人类参考基因组和灵长类动物之间观察到显著的序列差异,表明基因组多样性.
结论:
- 长读基因组测序,特别是与T2T-CHM13引用,对于在临床环境中准确检测逆转至关重要.
- 参考基因组T2T-CHM13增强了复杂结构变异的分辨率.
- 利用多样化和完整的参考基因组对于推进罕见疾病诊断和理解基因组多样性至关重要.
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