Abstract
SKELETAL muscle development involves the formation of multi-nucleated myotubes. This is thought to proceed by the induction of differentiation (acquisition of fusion competence) of myoblast cells, their aggregation, and union of their plasma membranes1á¤-3. Various membrane proteins including N-4,5 and M-cadherins6, N-5,7-9 and V-CAMs10 and integrins10,11 participate in myotube formation, but the molecular mechanisms of muscle cell fusion are poorly understood. Here we report the identification of three new, myoblast-expressed gene products, meltrin-αβ and γ, with homology to both viper haemorrhagic factors12,13 and fertilin (PH-30)14,15, a membrane protein involved in eggá¤-sperm fusion. Meltrin-α, a member of the metalloproteinase/disintegrin protein family, appears to be required for myotube formation. Involvement of a fertilin-related protein in myogenesis suggests that there are common mechanisms in gamete and myoblast fusion.
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Yagami-Hiromasa, T., Sato, T., Kurisaki, T. et al. A metalloprotease-disintegrin participating in myoblast fusion. Nature 377, 652–656 (1995). https://doi.org/10.1038/377652a0
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DOI: https://doi.org/10.1038/377652a0
