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Sarcospan, discovered by the research group of Kevin Campbell, is a 25-kDa transmembrane protein located in the dystrophin-associated protein complex of skeletal muscle cells. It contains four transmembrane spanning helices with both N- and C-terminal domains located intracellularly.^[1] Loss of sarcospan expression occurs in patients with Duchenne muscular dystrophy, indicating that dystrophin is required for proper localization of sarcospan.^[1] Interestingly, sarcospan knockout mice exhibit normal muscle structure and function, indicating that sarcospan is not necessary for muscle to develop.^[2]

[edit] References

1. ^ ^{a b} Crosbie et al. (1997). "Sarcospan, the 25-kDa transmembrane component of the dystrophin-glycoprotein complex". J Biol Chem 272 (50): 31221–4. doi:10.1074/jbc.272.50.31221. PMID 9395445. 
2. ^ Lebakken et al. (2000). "Sarcospan-deficient mice maintain normal muscle function.". Mol Cell Biol 20 (5): 1669–77. doi:10.1128/MCB.20.5.1669-1677.2000. PMID 10669744. 

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• MeSH Sarcospan

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