Abstract
ras genes (review in Barbacid, 1987) have been found in a large number of eukaryotic organisms, from Saccharomyces and Drosophila to chicken, rat, and man. Moreover, ras gene products of various species show a very high degree of homology: even between proteins from yeast and man there is approximately 54% identity between corresponding amino acids, and ras proteins from chicken and man differ only in three amino acids. Such evolutionary conservation implies an important cellular function for these proteins, and they have indeed been implicated in playing a crucial role in cell proliferation and terminal differentiation. Based on these observations and on biochemical similarities with G-proteins, it is thought that ras proteins participate as signal transducers at the beginning of the cascade of reactions leading to various essential cellular processes.
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de Vos, A.M., Tong, L., Milburn, M.V., Matias, P.M., Kim, SH. (1989). Three-Dimensional Structure of ras p21 Proteins. In: Bosch, L., Kraal, B., Parmeggiani, A. (eds) The Guanine — Nucleotide Binding Proteins. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-2037-2_3
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DOI: https://doi.org/10.1007/978-1-4757-2037-2_3
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