Genomic signatures of primate-pathogen interactions

灵长类动物-病原体相互作用的基因组特征

• 批准号: 10701007
• 负责人: Ellen Leffler
• 金额: $ 38.5万
• 依托单位: UNIVERSITY OF UTAH
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-09 至 2027-08-31
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10701007
• 关键词: Admixture; Area; Base Sequence; Biological Models; Blood typing procedure; Communicable Diseases; Copy Number Polymorphism; Data Set; Gene Cluster; Gene Family; Gene Frequency; Genes; Genetic; Genetic Variation; Genome; Genomics; Human; Individual; Learning; Macaca; Methods; Natural Selections; Pattern; Phenotype; Point Mutation; Population; Primates; Process; Recording of previous events; Research; Research Project Grants; Southeastern Asia; Study models; Testing; Variant; Work; blood group; driving force; fitness; genomic data; genomic signature; genomic variation; host-pathogen coevolution; insight; method development; nonhuman primate; novel strategies; paralogous gene; pathogen; pressure; tool

PROJECT SUMMARY Population genomic data carry a detailed record of evolutionary history, but this record is simultaneously impacted by multiple evolutionary forces making interpretation extremely challenging. Methods development and increasing accessibility of large-scale genomic datasets have led to more powerful strategies to disentangle the effects of natural selection and identify loci underlying recent adaptation. Yet we still lack understanding of many aspects of adaptive processes, including the types of genetic variation (e.g., point mutations vs. structural variants), numbers of loci, and selective regimes by which it occurs. Over the next five years, research in the Leffler lab aims to probe the genetics of adaptation by developing new approaches and datasets to study loci under recent pathogen-driven selective pressures in humans and non-human primates. Pathogens have a severe impact on host fitness and survival and consequently are a driving force for evolutionary change and an effective model system for learning about selective processes. We will combine approaches in computational, population and evolutionary genomics to explore a range of signatures that host- pathogen interactions leave in our genomes, organized in three project areas. First, we will characterize population genomic variation in the Arabian Peninsula, developing a new sequence-based approach to identify adaptive gene flow post-admixture and test for enrichment related to infectious disease, particularly focusing on blood group variation. Second, we will analyze copy number variation in paralogous gene clusters, developing new methods for inference of both copy number and selection, in order to test whether they may be frequent targets of pathogen-driven selection. Finally, we will investigate evolutionary genomics of wild macaques in southeast Asia. We will assess evidence for pathogen-driven selection by comparing allele frequencies in populations with a range of pathogen burdens and different levels of admixture with closely related species living in the absence of these pathogens. Together, the results of these research projects will provide new tools, datasets, and significant insight into the impact of host-pathogen co-evolution across populations, gene families, and primate species.

项目概要 群体基因组数据携带着进化历史的详细记录，但这种记录同时也是 受到多种进化力量的影响，使得解释变得极具挑战性。方法开发 大规模基因组数据集的可访问性不断提高，导致了更强大的策略 理清自然选择的影响并确定近期适应的基因座。然而我们还缺乏 了解适应性过程的许多方面，包括遗传变异的类型（例如，点 突变与结构变异）、基因座数量以及发生的选择性机制。未来五年内 多年来，莱夫勒实验室的研究旨在通过开发新方法和 用于研究人类和非人类灵长类动物近期病原体驱动的选择压力下的基因座的数据集。 病原体对宿主的健康和生存有严重影响，因此是宿主的驱动力 进化变化和学习选择性过程的有效模型系统。我们将结合 计算、群体和进化基因组学的方法来探索一系列承载的特征 病原体相互作用留在我们的基因组中，分为三个项目领域。首先，我们将表征 阿拉伯半岛的种群基因组变异，开发一种新的基于序列的方法来识别 混合后的适应性基因流和与传染病相关的富集测试，特别是聚焦 关于血型变异。其次，我们将分析旁系同源基因簇中的拷贝数变异， 开发推断拷贝数和选择的新方法，以测试它们是否可以 病原体驱动选择的常见目标。最后，我们将研究野生动物的进化基因组学。 分布于东南亚的猕猴。我们将通过比较等位基因来评估病原体驱动选择的证据 具有一系列病原体负荷和不同程度混合的人群中的频率 生活在没有这些病原体的情况下的相关物种。这些研究项目的成果将共同 提供新的工具、数据集，并深入了解宿主-病原体共同进化的影响 种群、基因家族和灵长类物种。