Alpha-sarcoglycan (IPR028658)

Short name: Alpha-SG

Overlapping homologous superfamilies


Family relationships


Alpha-sarcoglycan (also known as adhalin) belongs to the sarcoglycan protein family [PMID: 7937874]. It is required for FGF-dependent myogenic progenitor cell proliferation in mice [PMID: 21903674]. Mutations in the alpha-sarcoglycan gene are linked to autosomal recessive muscular dystrophy [PMID: 8069911, PMID: 7663524].

The sarcoglycan family proteins are single pass transmembrane proteins that are part of the dystrophin-associated glycoprotein complex (DGC), a multiprotein complex that links the actin cytoskeleton to the extracellular matrix in cardiac and skeletal muscle [PMID: 11917091]. The DGC can be classified biochemically into three subcomplexes: the cytoplasmic subcomplex (contains dystrophin, the dystrobrevins and the syntrophins), the dystroglycan subcomplex and the sarcoglycan subcomplex. The function of the sarcoglycan subcomplex is not clear. However, mutations in alpha-, beta-, gamma- and delta-sarcoglycan cause different forms of autosomal recessive limb girdle muscular dystrophies (LGMD) demonstrating its importance for normal muscle function [PMID: 17200151].

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0016020 membrane
GO:0016012 sarcoglycan complex

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.