Abnormal myosin post-translational modifications and ATP turnover time associated with human congenital myopathy-related RYR1 mutations

Conditions related to mutations in the gene encoding the skeletal muscle ryanodine receptor 1 (RYR1) are genetic muscle disorders and include congenital myopathies with permanent weakness, as well as episodic phenotypes such as rhabdomyolysis/myalgia. Although RYR1 dysfunction is the primary mechanism in RYR1‐related disorders, other downstream pathogenic events are less well understood and may include a secondary remodeling of major contractile proteins. Hence, in the present study, we aimed to investigate whether congenital myopathy‐related RYR1 mutations alter the regulation of the most abundant contractile protein, myosin.