title: Expression of the chicken c-src gene in COS cells.
abstract: The cellular homolog of the Rous sarcoma virus transforming gene (v-src) was cloned into a plasmid containing the simian virus 40 origin of replication and transcriptional signals. This recombinant plasmid, designated pSVOHCS11 , directs the synthesis of relatively high levels of c-src mRNA and c-src protein ( pp60c -src), when the plasmid is studied 48 to 72 h after calcium phosphate-mediated DNA transfection of COS (monkey) cells. The level of c-src mRNA synthesis is 50-fold higher than the amount of c-src RNA produced in uninfected chicken embryo fibroblasts. Furthermore, the level of pp60c -src expressed in pSVOHCS11 -transfected COS cells is approximately the same as that of pp60v -src in Rous sarcoma virus-transformed cells. Using this recombinant plasmid, we demonstrated that c-src mRNA contains sequences which map 3' to the previously identified c-src-v-src regions of homology. In view of the small amount of c-src mRNA and protein that can be isolated from uninfected cells, this transient expression system offers a convenient source of material for further analyses of the c-src gene product.
mesh_terms: D000818:Animals; D001358:Avian Sarcoma Viruses / Q000235:genetics*; D001483:Base Sequence; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D002478:Cells, Cultured; D002642:Chick Embryo; D002522:Chlorocebus aethiops; D004262:DNA Restriction Enzymes; D005814:Genes, Viral; D007668:Kidney; D009693:Nucleic Acid Hybridization; D009857:Oncogenes; D010957:Plasmids; D013539:Simian virus 40 / Q000235:genetics; D014158:Transcription, Genetic; D014162:Transfection
chemical_list: D004262:DNA Restriction Enzymes