Identification of the rs797045105 in the SERAC1 gene by Whole-Exome Sequencing in a Patient Suspicious of MEGDEL Syndrome

Whole Exome Sequencing (WES) has been increasingly utilized in genetic determinants of various inherited diseases. We identified a new variation in SERAC1 as the cause of 3-Methylglutaconic Aciduria (MEG), Deafness (D), Encephalopathy (E), and Leigh-like (L), MEGDEL syndrome using WES. We found an insertion, rs797045105 (chr6, 158571484, C>CCATG), in the SERAC1 gene with homozygous genotype in the patient and heterozygous genotype in her unaffected parents. Notably, bioinformatics analysis using mutation taster (prob>0.99) and DDIGin (prob=86.51) predicted this mutation as disease-causing. Also, the variant was not present in our database, including 700 exome files. These findings emphasize the pathogenicity of rs797045105 for MEGDEL syndrome. On the other hand, our data shed light on the significance of WES application as a genetic test to identify and characterize the comprehensive spectrum of genetic variation and classification for patients with neuro-metabolic disorders.