Dystroglycan is a glycoprotein widely distributed in skeletal muscle and other tissues; the pre-protein is cleaved into two subunits (alpha and beta) that form a complex which links the extracellular matrix to the cytoskeleton. This C-terminal domain of the alpha-subunit appears to contact neighboring cadherin-like repeats of alpha dystroglycan, and may also be involved in interactions with other components of the dystrophin-dystroglycan-complex (DGC). DGC has been shown to interact with extracellular matrix components such as laminin, perlecan and m-agrin, suggesting that the complex may play various different roles depending on the extracellular ligand.
Jiyao W et al.(2023). "The conserved domain database in 2023.",