-With the gnomAD v4.1 data release, the v4 Pre-Release track has been replaced with the gnomAD v4.1 -track. The v4.1 release includes a fix for the allele number +The Genome Aggregation Database (gnomAD) is a resource developed by an +international coalition of investigators at the Broad Institute and +collaborating institutions, with the goal of aggregating and harmonizing exome +and whole-genome sequencing data from large-scale sequencing projects spanning +disease-specific cohorts and population genetics studies. The most current release +on hg38 is v4.1. +GRCh38/hg38 reference assembly. For each variant, gnomAD provides allele +frequencies stratified by genetic ancestry group, alongside quality metrics +such as depth of coverage and genotype quality scores. The database also +supplies sequencing coverage, structural variants, CNVs, short tandem repeats, +non-coding constraint, gene-level constraint metrics — including pLI scores, +observed/expected (oe) ratios, and LOEUF values +— that quantify intolerance to loss-of-function variation and are widely used +to prioritize candidate disease genes. +
+ ++GnomAD 4 used the whole-genome data from gnomAD 3 and added more exomes. With +the gnomAD v4.1 data release, the v4 Pre-Release track has been replaced with +the gnomAD v4.1 track. The v4.1 release includes a fix for the allele number issue. The v4.1 track shows variants from 807,162 individuals, including 730,947 exomes and 76,215 genomes. This includes the 76,156 genomes from the gnomAD v3.1.2 release as well as new exome data from 416,555 UK Biobank individuals. For more detailed information on gnomAD v4.1, see the related blog post.
-The gnomAD v3.1.1 track is the current version of gnomAD 3 and shows variants +gnomAD 3 was a genomes-only release. The gnomAD v3.1.1 track is the current version of gnomAD 3 and shows variants from 76,156 whole genomes (and no exomes), all mapped to the GRCh38/hg38 reference sequence. 4,454 genomes were added to the number of genomes in the previous v3 release. For more detailed information on gnomAD v3.1, see the related blog post. A bugfix to v3.1 resulted in gnomAD3.1.1, see -changelog -
- -+changelog. Do not use gnomAD v3.1 anymore, we will remove the track soon.
GnomAD Genome Mutational Constraint is based on v3.1.2 and is available only on hg38. It shows the reduced variation caused by purifying natural selection. This is similar to negative selection on loss-of-function (LoF) for genes, but can be calculated for non-coding regions too. Positive values are red and reflect stronger mutation constraint (and less variation), indicating higher natural selection pressure in a region. Negative values are green and reflect lower mutation constraint (and more variation), indicating less selection pressure and less functional effect. Briefly, for any 1kbp window in the genome, a model based on trinucleotide sequence context, base-level methylation, and regional genomic features predicts expected number of mutations, and compares this number to the observed number of mutations using a Z-score (see preprint