1,845只 rhesus 的遗传多样性改善了遗传变异的解释,并确定了疾病模型
Jun Wang1,2, Meng Wang1,2, Ala Moshiri3
1Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, USA.
Nature communications
|July 5, 2024
概括
研究人员对1845只 rhesus 进行了测序,确定了与人类共享的数千种遗传变异. 这项工作促进了人类遗传疾病的动物模型的开发.
科学领域:
- 遗传学 是一个遗传学.
- 进行比较的基因组学.
- 灵长类动物模型
背景情况:
- 有效的动物模型对于理解和治疗人类疾病至关重要.
- rhesus 为疾病建模提供了宝贵的遗传多样性.
研究的目的:
- 为了利用 rhesus macaques 的遗传多样性来识别与人类遗传疾病相关的变体.
- 开发改进的方法来预测变体的病原性.
- 为人类遗传疾病建立新的灵长类模型.
主要方法:
- 在8个美国灵长类动物中心对1845只 rhesus macaques 374个基因进行了有针对性的测序.
- 识别和分析超过47,000个单核酸变体.
- 开发基于机器学习的病原性预测得分,整合 rhesus 和人类等位基频率.
主要成果:
- 确定了超过47,000个单核酸变体,与人类种群共享的很大比例.
- 一个新的机器学习得分在预测误解变体致病性方面表现出卓越的表现.
- 发现了许多功能丧失和有害变体,促进了 rhesus 病模型的发展.
- 使用具有OPA1:p.A8S变异的来确定自身主导光缩的遗传模型.
结论:
- rhesus macaques 拥有与人类遗传疾病相关的丰富遗传环境.
- 开发的机器学习方法提高了对变量效应的预测.
- 这项研究提供了有价值的遗传数据,并为人类视觉神经病变建立了一个新的灵长类模型,推进了翻译研究.
相关概念视频
Single Nucleotide Polymorphisms-SNPs
15.0K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
15.0K
Genetic Variation
273
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
273
Incomplete Dominance
22.5K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
22.5K
Mutation, Gene Flow, and Genetic Drift
58.3K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
58.3K
Genome-wide Association Studies-GWAS
13.3K
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...
13.3K
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


