| First Author | Sunada Y | Year | 1995 |
| Journal | Hum Mol Genet | Volume | 4 |
| Issue | 6 | Pages | 1055-61 |
| PubMed ID | 7655459 | Mgi Jnum | J:25954 |
| Mgi Id | MGI:73658 | Doi | 10.1093/hmg/4.6.1055 |
| Citation | Sunada Y, et al. (1995) Identification of a novel mutant transcript of laminin alpha 2 chain gene responsible for muscular dystrophy and dysmyelination in dy2J mice. Hum Mol Genet 4(6):1055-61 |
| abstractText | Murine dystrophia muscularis-2J (dy2J) is an autosomal recessive disorder characterized by muscular dystrophy and dysmyelination of peripheral nerve. Biochemical characterization of dy2J mice revealed the expression of a mutant laminin alpha 2 chain with a smaller molecular weight in the basal lamina of striated muscle and peripheral nerve. DNA sequencing of the alpha 2 chain cDNA amplified by RT-PCR from dy2J mice identified a novel and predominant transcript with a 171 base in-frame deletion. We also confirmed an underlying splice donor site mutation in the alpha 2 chain gene of the dy2J mouse. Translation of this variant transcript would result in the expression of a truncated alpha 2 chain having a 57 amino acid deletion (residues 34-90) and a substitution of Gln91Glu in the N-terminal domain VI, which is presumed to be involved in self-aggregation of laminin heterotrimers. Thus, the mutant alpha 2 chain could disrupt the formation of the laminin network and lead to muscle cell degeneration. Our results provide a molecular basis of muscular dystrophy and dysmyelination of peripheral nerve. |
