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A global reference for human genetic variation

Adam Auton, +479 more
TLDR
The 1000 Genomes Project as mentioned in this paper provided a comprehensive description of common human genetic variation by applying whole-genome sequencing to a diverse set of individuals from multiple populations, and reported the completion of the project, having reconstructed the genomes of 2,504 individuals from 26 populations using a combination of low-coverage whole genome sequencing, deep exome sequencing and dense microarray genotyping.
Abstract
The 1000 Genomes Project set out to provide a comprehensive description of common human genetic variation by applying whole-genome sequencing to a diverse set of individuals from multiple populations. Here we report completion of the project, having reconstructed the genomes of 2,504 individuals from 26 populations using a combination of low-coverage whole-genome sequencing, deep exome sequencing, and dense microarray genotyping. We characterized a broad spectrum of genetic variation, in total over 88 million variants (84.7 million single nucleotide polymorphisms (SNPs), 3.6 million short insertions/deletions (indels), and 60,000 structural variants), all phased onto high-quality haplotypes. This resource includes >99% of SNP variants with a frequency of >1% for a variety of ancestries. We describe the distribution of genetic variation across the global sample, and discuss the implications for common disease studies.

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Fine-mapping type 2 diabetes loci to single-variant resolution using high-density imputation and islet-specific epigenome maps

Anubha Mahajan, +113 more
Abstract: We expanded GWAS discovery for type 2 diabetes (T2D) by combining data from 898,130 European-descent individuals (9% cases), after imputation to high-density reference panels. With these data, we (i) extend the inventory of T2D-risk variants (243 loci, 135 newly implicated in T2D predisposition, comprising 403 distinct association signals); (ii) enrich discovery of lower-frequency risk alleles (80 index variants with minor allele frequency <5%, 14 with estimated allelic odds ratio >2); (iii) substantially improve fine-mapping of causal variants (at 51 signals, one variant accounted for >80% posterior probability of association (PPA)); (iv) extend fine-mapping through integration of tissue-specific epigenomic information (islet regulatory annotations extend the number of variants with PPA >80% to 73); (v) highlight validated therapeutic targets (18 genes with associations attributable to coding variants); and (vi) demonstrate enhanced potential for clinical translation (genome-wide chip heritability explains 18% of T2D risk; individuals in the extremes of a T2D polygenic risk score differ more than ninefold in prevalence).Combining 32 genome-wide association studies with high-density imputation provides a comprehensive view of the genetic contribution to type 2 diabetes in individuals of European ancestry with respect to locus discovery, causal-variant resolution, and mechanistic insight.
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International meta-analysis of PTSD genome-wide association studies identifies sex- and ancestry-specific genetic risk loci

Caroline M. Nievergelt, +213 more
TL;DR: A GWAS from the Psychiatric Genomics Consortium is reported in which two risk loci in European ancestry and one locus in African ancestry individuals are identified and it is found that PTSD is genetically correlated with several other psychiatric traits.
References
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Journal ArticleDOI

Complement Factor H Polymorphism in Age-Related Macular Degeneration

TL;DR: A genome-wide screen for polymorphisms associated with age-related macular degeneration revealed a polymorphism in linkage disequilibrium with the risk allele representing a tyrosine-histidine change at amino acid 402 in the complement factor H gene.
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Inference of human population history from individual whole-genome sequences

TL;DR: A more detailed history of human population sizes between approximately ten thousand and a million years ago is presented, using the pairwise sequentially Markovian coalescent model applied to the complete diploid genome sequences of a Chinese male, a Korean male, three European individuals, and two Yoruba males.
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Complement C3 Variant and the Risk of Age-Related Macular Degeneration

TL;DR: The common functional polymorphism rs2230199 in the C3 gene, corresponding to the electrophoretic variants C3S and C3F, was strongly associated with age-related macular degeneration in both the English group and the Scottish group and underscores the influence of the complement pathway in the pathogenesis of this disease.
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