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Title: Sarcoglycan  
Author: World Heritage Encyclopedia
Language: English
Subject: Muscle tissue, Sarcoglycanopathy, A-I junction, Dystrophin-associated protein complex, Myosatellite cell
Publisher: World Heritage Encyclopedia


Sarcoglycan beta/gamma/delta
Symbol Sarcoglycan_1
Pfam PF04790
InterPro IPR006875
Sarcoglycan alpha/epsilon
Symbol Sarcoglycan_2
Pfam PF05510
InterPro IPR008908

The sarcoglycans are a family of transmembrane proteins[1] (α, β, γ, δ or ε) involved in the protein complex responsible for connecting the muscle fibre cytoskeleton to the extracellular matrix, preventing damage to the muscle fibre sarcolemma through shearing forces.

The dystrophin glycoprotein complex (DGC) is a membrane-spanning complex that links the interior cytoskeleton to the extracellular matrix in muscle. The sarcoglycan complex is a subcomplex within the DGC and is composed of several muscle-specific, transmembrane proteins (alpha-, beta-, gamma-, delta- and zeta-sarcoglycan). The sarcoglycans are asparagine-linked glycosylated proteins with single transmembrane domains.[2][3]

The disorders caused by the mutations of the sarcoglycans are called sarcoglycanopathies. Mutations in the α, β, γ or δ genes (not ε) encoding these proteins can lead to the associated limb-girdle muscular dystrophy.



  1. ^ Sarcoglycans at the US National Library of Medicine Medical Subject Headings (MeSH)
  2. ^ Zheng Y, Chockalingam PS, Cholera R, Oak SA, Jarrett HW, Thomason DB (2002). "Dystrophin-glycoprotein complex and Ras and Rho GTPase signaling are altered in muscle atrophy". Am J Physiol Cell Physiol 283 (2): –.  
  3. ^ Wheeler MT, Zarnegar S, Mcnally EM (2002). "zeta-Sarcoglycan, a novel component of the sarcoglycan complex, is reduced in muscular dystrophy". Hum. Mol. Genet. 11 (18): 2147–2154.  

This article incorporates text from the public domain Pfam and InterPro IPR006875

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