从大规模的外基因组测序数据中推断出化合物异构性.
Michael H Guo1,2, Laurent C Francioli2,3, Sarah L Stenton2,3,4
1Department of Neurology, Hospital of the University of the Pennsylvania, Philadelphia, PA, USA.
Nature genetics
|December 6, 2023
概括
确定基因变异是否在变异 (不同的染色体) 或 cis (相同的染色体) 中,对于诊断衰退性疾病至关重要. 这项研究开发了一种新方法,使用大规模遗传数据准确推断变异阶段,提高诊断能力.
科学领域:
- 遗传学 遗传学 是一个
- 基因组医学是基因组医学.
- 计算生物学 计算生物学
背景情况:
- 衰退性疾病需要两个有害的遗传变异,一个在每个染色体副本 (转变) 上,以表现.
- 区分 cis 和 trans 变体对于准确的基因诊断至关重要,但在临床上具有挑战性.
- 目前用于变异分相的方法在常规临床应用中通常是有限的.
研究的目的:
- 开发和验证用于推断基因内罕见变异对相位的计算策略.
- 为了利用人口规模的外体数据进行准确的变异分阶段.
- 提供一种资源,以帮助解释复合异合体变体的复合异合体变体,以诊断衰退性疾病.
主要方法:
- 用基因组聚合数据库 (gnomAD v2,n=125,748个外体) 的基因型来推断罕见变异对的推断阶段.
- 利用大规模的外基因组测序数据来估计变异的阶段.
- 使用三组数据和患有孟德尔条件的患者队列验证了分阶段精度.
主要成果:
- 开发的战略准确地估计了变种阶段,准确率为96%.
- 在基于家庭 (三组) 的数据和患者队列中,分阶段准确性得到证实.
- 一个公共资源的分阶段估计和罕见变异在转基因每种基因的数量产生.
结论:
- 新的分阶段策略显著提高了解释复合异合体变体的能力.
- 这种方法提高了罕见遗传疾病的诊断产量.
- 该公共资源有助于解释复杂的遗传发现在衰退性疾病.
相关概念视频
Genome-wide Association Studies-GWAS
13.5K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
13.5K
Evolutionary Relationships through Genome Comparisons
5.8K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.8K
Human Genetics
586
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
586
Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
Next-generation Sequencing
89.0K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
89.0K
Genomics
36.4K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
36.4K


