학술논문
Evidence for secondary-variant genetic burden and non-random distribution across biological modules in a recessive ciliopathy
Document Type
Report
Author
Kousi, Maria; Söylemez, Onuralp; Ozanturk, Aysegül; Mourtzi, Niki; Akle, Sebastian; Jungreis, Irwin; Muller, Jean; Cassa, Christopher A.; Brand, Harrison; Mokry, Jill Anne; Wolf, Maxim; Sadeghpour, Azita; McFadden, Kelsey; Lewis, Richard A.; Talkowski, Michael E.; Dollfus, Helene; Kellis, Manolis; Davis, Erica E.; Sunyaev, Shamil R.; Katsanis, Nicholas
Source
Nature Genetics. November 2020, Vol. 52 Issue 11, p1145, 6 p.
Subject
Language
English
ISSN
1061-4036
Abstract
Author(s): Maria Kousi [sup.1] [sup.2] [sup.3] , Onuralp Söylemez [sup.2] [sup.4] [sup.5] , Aysegül Ozanturk [sup.1] , Niki Mourtzi [sup.6] , Sebastian Akle [sup.4] [sup.7] , Irwin Jungreis [sup.2] [sup.3] [...]
The influence of genetic background on driver mutations is well established; however, the mechanisms by which the background interacts with Mendelian loci remain unclear. We performed a systematic secondary-variant burden analysis of two independent cohorts of patients with Bardet-Biedl syndrome (BBS) with known recessive biallelic pathogenic mutations in one of 17 BBS genes for each individual. We observed a significant enrichment of trans-acting rare nonsynonymous secondary variants in patients with BBS compared with either population controls or a cohort of individuals with a non-BBS diagnosis and recessive variants in the same gene set. Strikingly, we found a significant over-representation of secondary alleles in chaperonin-encoding genes--a finding corroborated by the observation of epistatic interactions involving this complex in vivo. These data indicate a complex genetic architecture for BBS that informs the biological properties of disease modules and presents a model for secondary-variant burden analysis in recessive disorders. Analysis of two independent cohorts of patients with Bardet-Biedl syndrome (BBS) with known recessive biallelic pathogenic mutations in one of 17 BBS genes shows an enrichment of rare nonsynonymous secondary variants in the same gene set, with significant over-representation of secondary alleles in chaperonin-encoding genes.
The influence of genetic background on driver mutations is well established; however, the mechanisms by which the background interacts with Mendelian loci remain unclear. We performed a systematic secondary-variant burden analysis of two independent cohorts of patients with Bardet-Biedl syndrome (BBS) with known recessive biallelic pathogenic mutations in one of 17 BBS genes for each individual. We observed a significant enrichment of trans-acting rare nonsynonymous secondary variants in patients with BBS compared with either population controls or a cohort of individuals with a non-BBS diagnosis and recessive variants in the same gene set. Strikingly, we found a significant over-representation of secondary alleles in chaperonin-encoding genes--a finding corroborated by the observation of epistatic interactions involving this complex in vivo. These data indicate a complex genetic architecture for BBS that informs the biological properties of disease modules and presents a model for secondary-variant burden analysis in recessive disorders. Analysis of two independent cohorts of patients with Bardet-Biedl syndrome (BBS) with known recessive biallelic pathogenic mutations in one of 17 BBS genes shows an enrichment of rare nonsynonymous secondary variants in the same gene set, with significant over-representation of secondary alleles in chaperonin-encoding genes.