Abstract
The primary sequence of two components of the dystrophin–glycoprotein complex has been established by complementary DNA cloning. The transmembrane 43K and extracellular 156K dystrophin-associated glycoproteins (DAGs) are encoded by a single messenger RNA and the extracellular 156K DAG binds laminin. Thus, the 156K DAG is a new laminin-binding glycoprotein which may provide a linkage between the sarcolemma and extracellular matrix. These results support the hypothesis that the dramatic reduction in the 156K DAG in Duchenne muscular dystrophy leads to a loss of a linkage between the sarcolemma and extra-cellular matrix and that this may render muscle fibres more susceptible to necrosis.
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Ibraghimov-Beskrovnaya, O., Ervasti, J., Leveille, C. et al. Primary structure of dystrophin-associated glycoproteins linking dystrophin to the extracellular matrix. Nature 355, 696–702 (1992). https://doi.org/10.1038/355696a0
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DOI: https://doi.org/10.1038/355696a0