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. 1984 Jan;4(1):23–29. doi: 10.1128/mcb.4.1.23

Saccharomyces cerevisiae synthesizes proteins related to the p21 gene product of ras genes found in mammals.

A G Papageorge, D Defeo-Jones, P Robinson, G Temeles, E M Scolnick
PMCID: PMC368653  PMID: 6422257

Abstract

A family of normal vertebrate genes and oncogenes has been called the ras gene family. The name ras was assigned to this gene family based on the species of origin of the viral oncogenes of the rat-derived Harvey and Kirsten murine sarcoma viruses. There are now three known functional members of the ras gene family, and genes homologous to ras genes have been detected in the DNA of a wide variety of mammals and in Drosophila melanogaster. Prior experiments have detected proteins coded for by ras genes in a large number of normal cells, cell lines, and tumors. We report here the detection of ras-related proteins in D. melanogaster, a result predicted by the earlier detection of ras-related genes in the Drosophila genome. We also report for the first time the detection of ras-related proteins in a single-cell eucaryocyte, Saccharomyces cerevisiae. These proteins, approximately 30K in size, are recognized by both a monoclonal antibody which binds to the p21 coded for by mammalian ras genes and a polyclonal rat serum made by transplanting a v-Ha-ras-induced tumor in Osborne-Mendel rats. The p21 of v-Ha-ras and the 30K proteins from S. cerevisiae share methionine-labeled peptides as detected by two-dimensional tryptic peptide maps. The results indicate that S. cerevisiae synthesizes ras-related proteins. A genetic analysis of the function of these proteins for yeast cells may now be possible.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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