Sustained induction of egr-1 by v-src correlates with a lack of fos-mediated repression of the egr-1 promoter. 1992

S A Qureshi, and M H Rim, and K Alexandropoulos, and K Berg, and V P Sukhatme, and D A Foster
Institute for Biomolecular Structure and Function, Hunter College, City University of New York, New York 10021.

Serum stimulation of quiescent fibroblasts leads to a transient induction of the transcription factor egr-1. However, the induction of egr-1 by v-src was found to be sustained rather than transient. The proto-oncogene fos has been reported to be co-regulated with egr-1 and to repress serum-induced egr-1 expression. We found that c-fos prevents v-src-induced gene expression regulated by the egr-1 promoter. Thus, the sustained induction of egr-1 by v-src could be explained by a lack of c-fos induction by v-src. Consistent with this hypothesis, egr-1 and c-fos were co-induced by serum, but not by v-src, in Balb/c 3T3 cells; v-src did not induce c-fos expression in these cells. We propose that sustained expression of egr-1 induced by v-src in Balb/c 3T3 cells is due to a lack of c-fos down-regulation of egr-1.

UI MeSH Term Description Entries
D004268 DNA-Binding Proteins Proteins which bind to DNA. The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases. DNA Helix Destabilizing Proteins,DNA-Binding Protein,Single-Stranded DNA Binding Proteins,DNA Binding Protein,DNA Single-Stranded Binding Protein,SS DNA BP,Single-Stranded DNA-Binding Protein,Binding Protein, DNA,DNA Binding Proteins,DNA Single Stranded Binding Protein,DNA-Binding Protein, Single-Stranded,Protein, DNA-Binding,Single Stranded DNA Binding Protein,Single Stranded DNA Binding Proteins
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014157 Transcription Factors Endogenous substances, usually proteins, which are effective in the initiation, stimulation, or termination of the genetic transcription process. Transcription Factor,Factor, Transcription,Factors, Transcription
D014158 Transcription, Genetic The biosynthesis of RNA carried out on a template of DNA. The biosynthesis of DNA from an RNA template is called REVERSE TRANSCRIPTION. Genetic Transcription
D016391 Genes, src Retrovirus-associated DNA sequences (src) originally isolated from the Rous sarcoma virus (RSV). The proto-oncogene src (c-src) codes for a protein that is a member of the tyrosine kinase family and was the first proto-oncogene identified in the human genome. The human c-src gene is located at 20q12-13 on the long arm of chromosome 20. c-src Genes,src Genes,v-src Genes,c-src Proto-Oncogenes,src Gene,src Oncogene,v-src Oncogenes,Gene, c-src,Gene, src,Gene, v-src,Genes, c-src,Genes, v-src,Oncogene, src,Oncogene, v-src,Oncogenes, src,Oncogenes, v-src,Proto-Oncogene, c-src,Proto-Oncogenes, c-src,c src Genes,c src Proto Oncogenes,c-src Gene,c-src Proto-Oncogene,src Oncogenes,v src Genes,v src Oncogenes,v-src Gene,v-src Oncogene
D016475 3T3 Cells Cell lines whose original growing procedure consisted being transferred (T) every 3 days and plated at 300,000 cells per plate (J Cell Biol 17:299-313, 1963). Lines have been developed using several different strains of mice. Tissues are usually fibroblasts derived from mouse embryos but other types and sources have been developed as well. The 3T3 lines are valuable in vitro host systems for oncogenic virus transformation studies, since 3T3 cells possess a high sensitivity to CONTACT INHIBITION. 3T3 Cell,Cell, 3T3,Cells, 3T3
D016762 Genes, fos Retrovirus-associated DNA sequences (fos) originally isolated from the Finkel-Biskis-Jinkins (FBJ-MSV) and Finkel-Biskis-Reilly (FBR-MSV) murine sarcoma viruses. The proto-oncogene protein c-fos codes for a nuclear protein which is involved in growth-related transcriptional control. The insertion of c-fos into FBJ-MSV or FBR-MSV induces osteogenic sarcomas in mice. The human c-fos gene is located at 14q21-31 on the long arm of chromosome 14. c-fos Genes,fos Genes,v-fos Genes,c-fos Proto-Oncogenes,v-fos Oncogenes,c fos Genes,c fos Proto Oncogenes,c-fos Gene,c-fos Proto-Oncogene,fos Gene,v fos Genes,v fos Oncogenes,v-fos Gene,v-fos Oncogene
D051379 Mice The common name for the genus Mus. Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus
D051766 Early Growth Response Protein 1 An early growth response transcription factor and zinc finger protein that has been implicated in regulation of CELL PROLIFERATION and APOPTOSIS. EGR1 Transcription Factor,Early Growth Response Transcription Factor 1,Zinc Finger Protein 225,Znf225 Protein,Protein, Znf225,Transcription Factor, EGR1

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