Platelet-derived growth factor stimulates tyrosine-specific protein kinase activity in Swiss mouse 3T3 cell membranes.
- 1 July 1982
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 79 (14), 4303-4307
- https://doi.org/10.1073/pnas.79.14.4303
Abstract
Platelet-derived growth factor (PDGF) stimulates the incorporation of 32P from [.gamma.-32P]ATP into a MW .apprxeq. 170,000 protein by an endogenous tyrosine-specific protein kinase in membrane preparations of Swiss mouse 3T3 cells. Epidermal growth factor (EGF), but not fibroblast growth factor (FGF) or insulin, stimulates limited incorporation of 32P into a protein of similar MW. The ligand concentration required for half-maximal activity (S0.5) for PDGF stimulation of phosphorylation is 50 ng/ml; saturation is achieved at 300 ng/ml. The S0.5 for ATP is 15 .mu.M. Mg2+ or Mn2+ is required for protein kinase activity. Stimulation by PDGF results in the preferential phosphorylation of tyrosine residues in this MW .apprxeq. 170,000 membrane protein. The MW .apprxeq. 170,000 protein can be resolved into MW .apprxeq. 180,000 and 160,000 components in 4% NaDodSO4 gels. PDGF stimulates 32P incorporation preferentially into the MW 180,000 and less extensively into the MW .apprxeq. 160,000 protein. EGF stimulates 32P incorporation predominantly into a protein of MW = 160,000. The similarity of PDGF and EGF in stimulating phosphotyrosine-specific protein kinase activity and the stimulation of a similar activity by viral transformation (src) genes suggest that a common mechanism may exist for the phenotypic expression of increased DNA synthesis and cell growth stimulated by these separate factors.This publication has 31 references indexed in Scilit:
- Stimulation of tyrosine-specific phosphorylation by platelet-derived growth factorNature, 1982
- Stimulation of protein phosphorylation in Swiss mouse 3T3 cells by human platelet derived growth factorBiochemical and Biophysical Research Communications, 1981
- Epidermal growth factor-stimulated phosphorylation of tyrosine residues on a 120 000 dalton protein in mouse liver plasma membrane subfractionsBiochemical and Biophysical Research Communications, 1981
- Epidermal growth factor induces rapid tyrosine phosphorylation of proteins in A431 human tumor cellsCell, 1981
- Transforming proteins of some feline and avian sarcoma viruses are related structurally and functionallyCell, 1981
- Characterization of protein kinase activity associated with the transforming gene product of Fujinami sarcoma virusCell, 1980
- Identification of a cellular protein substrate phosphorylated by the avian sarcoma virus-transforming gene productCell, 1980
- Epidermal growth factor stimulates phosphorylation in membrane preparations in vitroNature, 1978
- Evidence that the transforming gene of avian sarcoma virus encodes a protein kinase associated with a phosphoproteinCell, 1978
- Cleavage of Structural Proteins during the Assembly of the Head of Bacteriophage T4Nature, 1970