Putative glycosidase. Promotes myogenesis by activating AKT signaling through the maturation and secretion of IGF2. Interacts with IGF2; this interaction is required for IGF2 secretion. Only a minor fraction is present in the peripheral endoplasmic reticulum. The disease is caused by variants affecting the gene represented in this entry. The requirement of the predicted catalytic residue Asp-463 to support myogenic function strongly suggests that MYORG is an enzymatically active glycosidase in vivo, even if concrete experimental proof for enzymatic activity is still missing. Belongs to the glycosyl hydrolase 31 family.