Abstract
Stimulation of PC12 cells with nerve growth factor (NGF) increased mitogen-activated protein kinase kinase (MAPKK) activity > 20-fold after 5 min to a level that was largely sustained for at least 90 min. MAPKK activity was stimulated to a similar level by epidermal growth factor (EGF), but peaked at 2 min, declining thereafter and returning to basal levels after 60-90 min. Activation of MAPKK by either growth factor occurred prior to the activation of MAP kinase, consistent with MAPKK being the physiological activator of MAP kinase. The results demonstrate that the transient activation of MAPKK by EGF and its sustained activation by NGF underlies the transient and sustained activation of MAP kinase induced by EGF and NGF respectively. NGF or EGF induced the same two forms of MAPKK that were resolved on a Mono Q column. The Peak-1 MAPKK was activated initially and partially converted into the more acidic peak-2 MAPKK after prolonged growth-factor stimulation. The Peak-2 MAPKK was 20-fold more sensitive to inactivation by the catalytic subunit of protein phosphatase 2A. Stimulation with NGF caused a striking translocation of MAP kinase from the cytosol to the nucleus after 30 min, but not nuclear translocation of MAP kinase occurred after stimulation with EGF. The results suggest that sustained activation of the MAP kinase cascade may be required for MAP kinase to enter the nucleus, where it may initiate the gene transcription events required for neuronal differentiation of PC12 cells.
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- Ahn N. G., Seger R., Bratlien R. L., Diltz C. D., Tonks N. K., Krebs E. G. Multiple components in an epidermal growth factor-stimulated protein kinase cascade. In vitro activation of a myelin basic protein/microtubule-associated protein 2 kinase. J Biol Chem. 1991 Mar 5;266(7):4220–4227. [PubMed] [Google Scholar]
- Anderson N. G., Maller J. L., Tonks N. K., Sturgill T. W. Requirement for integration of signals from two distinct phosphorylation pathways for activation of MAP kinase. Nature. 1990 Feb 15;343(6259):651–653. doi: 10.1038/343651a0. [DOI] [PubMed] [Google Scholar]
- Boonstra J., Moolenaar W. H., Harrison P. H., Moed P., van der Saag P. T., de Laat S. W. Ionic responses and growth stimulation induced by nerve growth factor and epidermal growth factor in rat pheochromocytoma (PC12) cells. J Cell Biol. 1983 Jul;97(1):92–98. doi: 10.1083/jcb.97.1.92. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Boulton T. G., Nye S. H., Robbins D. J., Ip N. Y., Radziejewska E., Morgenbesser S. D., DePinho R. A., Panayotatos N., Cobb M. H., Yancopoulos G. D. ERKs: a family of protein-serine/threonine kinases that are activated and tyrosine phosphorylated in response to insulin and NGF. Cell. 1991 May 17;65(4):663–675. doi: 10.1016/0092-8674(91)90098-j. [DOI] [PubMed] [Google Scholar]
- Bradford M. M. A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding. Anal Biochem. 1976 May 7;72:248–254. doi: 10.1006/abio.1976.9999. [DOI] [PubMed] [Google Scholar]
- Chao M. V. Growth factor signaling: where is the specificity? Cell. 1992 Mar 20;68(6):995–997. doi: 10.1016/0092-8674(92)90068-n. [DOI] [PubMed] [Google Scholar]
- Chen R. H., Sarnecki C., Blenis J. Nuclear localization and regulation of erk- and rsk-encoded protein kinases. Mol Cell Biol. 1992 Mar;12(3):915–927. doi: 10.1128/mcb.12.3.915. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gotoh Y., Nishida E., Yamashita T., Hoshi M., Kawakami M., Sakai H. Microtubule-associated-protein (MAP) kinase activated by nerve growth factor and epidermal growth factor in PC12 cells. Identity with the mitogen-activated MAP kinase of fibroblastic cells. Eur J Biochem. 1990 Nov 13;193(3):661–669. doi: 10.1111/j.1432-1033.1990.tb19384.x. [DOI] [PubMed] [Google Scholar]
- Greene L. A., Tischler A. S. Establishment of a noradrenergic clonal line of rat adrenal pheochromocytoma cells which respond to nerve growth factor. Proc Natl Acad Sci U S A. 1976 Jul;73(7):2424–2428. doi: 10.1073/pnas.73.7.2424. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Gómez N., Cohen P. Dissection of the protein kinase cascade by which nerve growth factor activates MAP kinases. Nature. 1991 Sep 12;353(6340):170–173. doi: 10.1038/353170a0. [DOI] [PubMed] [Google Scholar]
- Gómez N., Tonks N. K., Morrison C., Harmar T., Cohen P. Evidence for communication between nerve growth factor and protein tyrosine phosphorylation. FEBS Lett. 1990 Oct 1;271(1-2):119–122. doi: 10.1016/0014-5793(90)80386-w. [DOI] [PubMed] [Google Scholar]
- Leevers S. J., Marshall C. J. Activation of extracellular signal-regulated kinase, ERK2, by p21ras oncoprotein. EMBO J. 1992 Feb;11(2):569–574. doi: 10.1002/j.1460-2075.1992.tb05088.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Matsuda S., Kosako H., Takenaka K., Moriyama K., Sakai H., Akiyama T., Gotoh Y., Nishida E. Xenopus MAP kinase activator: identification and function as a key intermediate in the phosphorylation cascade. EMBO J. 1992 Mar;11(3):973–982. doi: 10.1002/j.1460-2075.1992.tb05136.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Nakielny S., Campbell D. G., Cohen P. MAP kinase kinase from rabbit skeletal muscle. A novel dual specificity enzyme showing homology to yeast protein kinases involved in pheromone-dependent signal transduction. FEBS Lett. 1992 Aug 17;308(2):183–189. doi: 10.1016/0014-5793(92)81271-m. [DOI] [PubMed] [Google Scholar]
- Nakielny S., Cohen P., Wu J., Sturgill T. MAP kinase activator from insulin-stimulated skeletal muscle is a protein threonine/tyrosine kinase. EMBO J. 1992 Jun;11(6):2123–2129. doi: 10.1002/j.1460-2075.1992.tb05271.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Payne D. M., Rossomando A. J., Martino P., Erickson A. K., Her J. H., Shabanowitz J., Hunt D. F., Weber M. J., Sturgill T. W. Identification of the regulatory phosphorylation sites in pp42/mitogen-activated protein kinase (MAP kinase). EMBO J. 1991 Apr;10(4):885–892. doi: 10.1002/j.1460-2075.1991.tb08021.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Pulverer B. J., Kyriakis J. M., Avruch J., Nikolakaki E., Woodgett J. R. Phosphorylation of c-jun mediated by MAP kinases. Nature. 1991 Oct 17;353(6345):670–674. doi: 10.1038/353670a0. [DOI] [PubMed] [Google Scholar]
- Scott J. D., Glaccum M. B., Fischer E. H., Krebs E. G. Primary-structure requirements for inhibition by the heat-stable inhibitor of the cAMP-dependent protein kinase. Proc Natl Acad Sci U S A. 1986 Mar;83(6):1613–1616. doi: 10.1073/pnas.83.6.1613. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Stokoe D., Campbell D. G., Nakielny S., Hidaka H., Leevers S. J., Marshall C., Cohen P. MAPKAP kinase-2; a novel protein kinase activated by mitogen-activated protein kinase. EMBO J. 1992 Nov;11(11):3985–3994. doi: 10.1002/j.1460-2075.1992.tb05492.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sturgill T. W., Ray L. B., Erikson E., Maller J. L. Insulin-stimulated MAP-2 kinase phosphorylates and activates ribosomal protein S6 kinase II. Nature. 1988 Aug 25;334(6184):715–718. doi: 10.1038/334715a0. [DOI] [PubMed] [Google Scholar]