Description : Combined oxidative phosphorylation deficiency-17 is an autosomal recessive disorder
of mitochondrial dysfunction characterized by onset of severe hypertrophic cardiomyopathy
in the first year of life. Other features include hypotonia, poor growth, lactic acidosis,
and failure to thrive. The disorder may be fatal in early childhood (summary by Haack
et al., 2013).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the elaC ribonuclease Z 2 gene (ELAC2, 605367.0006);
Laboratory abnormalities : Increased urinary orotic acid (in some patients); Increased urinary organic acids (in some patients); Accumulation of unprocessed mt-tRNA intermediates in skeletal muscle cells and fibroblasts;