Noncoding de novo mutations in SCN2A are associated with autism spectrum disorders
Zhang, Y.; Ahsan, M. U.; Wang, K.
Show abstract
Previous genetic studies in ASD identified hundreds of high-confidence ASD genes enriched with likely deleterious protein-coding de novo mutations (DNMs). Multiple studies also demonstrated that DNMs in the non-coding genome can contribute to ASD risk. However, identification of individual risk genes enriched with noncoding DNMs has remained largely unexplored. We analyzed two datasets with over 5000 ASD families to assess the contribution of noncoding DNMs. We used two methods to assess statistical significance for noncoding DNMs: a point-based test that analyzes sites that are likely functional, and a segment-based test that analyzes 1kb genomic segments with segment-specific background mutation rates. We found that coding and noncoding DNMs in SCA2A are associated with ASD risk. Further application of these approaches on large-scale whole genome sequencing data will aid in identifying additional candidates ASD risk genes.
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