Abstract
The migration of neuronal precursors from germinal zones to neuronal layers is critical to the establishment of functional neural circuitry in developing brain. Previous work has identified a protein, astrotactin (ASTN), as the neuronal ligand for locomotion along the radial glial fiber system. Molecular cloning of astrotactin reveals that the molecule is a membrane associated glycoprotein with three EGF motifs and two FNIII domains. As shown by in vitro studies, the expressed bacterial fusion protein functions in neuronal migration, suggesting that astrotactin provides a mechanism for glia-guided migration. Genetic analyses indicate that the gene is located on Chromosome 1 in the mouse, in a region syntenic with lq25-27 in humans. Mutations in this area of the human genome are associated with microcephaly and other developmental anomalies.
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Zheng, C. et al. (1997). Mechanisms of Neuronal Migration. In: Galaburda, A.M., Christen, Y. (eds) Normal and Abnormal Development of the Cortex. Research and Perspectives in Neurosciences. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60861-2_3
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DOI: https://doi.org/10.1007/978-3-642-60861-2_3
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