PER viewer

Explore pathogenic variant enriched regions (PERs) across genes and gene families

Gene search

PER viewer is a tool for missense variant interpretation. Conserved amino acids among gene-family members are enriched with patient variants and constrained from variants in the general population, here we provide a statistical framework that is able to identify PERs across genes and gene families.


Citation and Contact

Eduardo Pérez-Palma, Patrick May, Sumaiya Iqbal, Lisa-Marie Niestroj, Juanjiangmeng Du, Henrike O Heyne, Jessica A Castrillon, Anne O'Donnell-Luria, Peter Nürnberg, Aarno Palotie, Mark Daly, Dennis Lal. Identification of Pathogenic Variant Enriched Regions Across Genes and Gene Families. Genome Research 30(1), 62-71, Jan 2020.

Method Summary

Predicting the deleteriousness of missense variants is extremely difficult. Variants whithin sites essential to protein function is an important criterion for variant pathogenicity prediction. However, for many proteins these essential sites have not been identified due to lack of statistical power and experimental data.

Here, we have developed a novel statistical framework to identify missense pathogenic enriched regions (PERs). We compare missense variant density identified in individuals of the general population (gnomAD, n= 2,219,811) against missense variant density retrieved from patient variant databases (ClinVar/HGMD, n = 76,153). To gain power, we grouped 9,990 genes into 2,871 gene families and evaluated the density of pathogenic variants across all members of the gene family.

We identified 464 PERs spanning 41,463 amino acids in 1,252 genes. In addition, gene-wise analysis was able to identify 251 additional PERs involving 2,639 amino acids. These regions can be effectively constrained from variation in the general population and at the same time enriched with disease associated variants.

With the present tool you can explore the neutral/pathogenic missense burden in a gene- or gene-family wide level. In particular, for large gene families, such as ion channels, our approach facilitates evaluation of variant pathogenicity.

PER viewer tutorial N1: Overview

PER viewer tutorial 2: Missense variant interpretation