A protein-truncating R179X variant in RNF186 confers protection against ulcerative colitis

Manuel A Rivas, Daniel Graham, Patrick Sulem, Christine Stevens, A Nicole Desch, Philippe Goyette, Daniel Gudbjartsson, Ingileif Jonsdottir, Unnur Thorsteinsdottir, Frauke Degenhardt, Sören Mucha, Mitja I Kurki, Dalin Li, Mauro D'Amato, Vito Annese, Severine Vermeire, Rinse K Weersma, Jonas Halfvarson, Paulina Paavola-Sakki, Maarit LappalainenMonkol Lek, Beryl Cummings, Taru Tukiainen, Talin Haritunians, Leena Halme, Lotta L E Koskinen, Ashwin N Ananthakrishnan, Yang Luo, Graham A Heap, Marijn C Visschedijk, Daniel G MacArthur, Tariq Ahmad, Carl A Anderson, Steven R Brant, Richard H Duerr, Mark S Silverberg, Judy H Cho, Aarno Palotie, Päivi Saavalainen, Kimmo Kontula, Martti Färkkilä, Dermot P B McGovern, Andre Franke, Kari Stefansson, John D Rioux, Ramnik J Xavier, Mark J Daly, C Hawkey, C Mathew, N Prescott, UK IBD Genetics Consortium

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Abstract

Protein-truncating variants protective against human disease provide in vivo validation of therapeutic targets. Here we used targeted sequencing to conduct a search for protein-truncating variants conferring protection against inflammatory bowel disease exploiting knowledge of common variants associated with the same disease. Through replication genotyping and imputation we found that a predicted protein-truncating variant (rs36095412, p.R179X, genotyped in 11,148 ulcerative colitis patients and 295,446 controls, MAF=up to 0.78%) in RNF186, a single-exon ring finger E3 ligase with strong colonic expression, protects against ulcerative colitis (overall P=6.89 × 10(-7), odds ratio=0.30). We further demonstrate that the truncated protein exhibits reduced expression and altered subcellular localization, suggesting the protective mechanism may reside in the loss of an interaction or function via mislocalization and/or loss of an essential transmembrane domain.

Original languageEnglish
Article number12342
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 9 Aug 2016

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