Abstract
Neural tissues contain high levels of the cellular homologue of the transforming protein of Rous sarcoma virus (RSV)1–4, but neither the specific cell types expressing high levels of c-src, nor the function of the cellular src (c-src) protein has been determined. Using primary culture methods, we have found that pure neurones and astrocytes derived from the rat central nervous system (CNS) contain 15- to 20-times higher levels of the c-src protein than fibroblasts. However, the specific activity of the c-src protein from the neuronal cultures is 6- to 12-times higher than that from the astrocyte cultures. In addition, the c-src protein expressed in neuronal cultures contains a structural alteration within the aminoterminal region of the molecule that causes a shift in the mobility of the c-src protein on the SDS-polyacrylamide gels. These results indicate that a structurally distinct form of the cellular src protein that possesses an activated tyrosylkinase activity is expressed at very high levels in post-mitotic CNS neurones.
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Brugge, J., Cotton, P., Queral, A. et al. Neurones express high levels of a structurally modified, activated form of pp60c-src. Nature 316, 554–557 (1985). https://doi.org/10.1038/316554a0
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DOI: https://doi.org/10.1038/316554a0
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