Mitochondrial diseases are a heterogeneous group of disorders characterized by faulty oxidative phosphorylation. They can present with a broad range of symptoms occurring at any age. Their diverse clinical manifestation is accompanied by a vast genetic heterogeneity making molecular diagnosis challenging. To identify disease causing variants I initially investigated the coding regions using whole exome sequencing (WES). For identification of noncoding pathogenic variants I subsequently established a RNA sequencing (RNA-seq) analysis. I validated prioritized variants and novel disease-associated genes using functional complementation assays, quantitative proteomics, and metabolomics.
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