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. 1995 Mar 1;14(5):951–962. doi: 10.1002/j.1460-2075.1995.tb07076.x

ERK phosphorylation potentiates Elk-1-mediated ternary complex formation and transactivation.

H Gille 1, M Kortenjann 1, O Thomae 1, C Moomaw 1, C Slaughter 1, M H Cobb 1, P E Shaw 1
PMCID: PMC398167  PMID: 7889942

Abstract

Induction of the human c-fos proto-oncogene by mitogens depends on the formation of a ternary complex by p62TCF with the serum response factor (SRF) and the serum response element (SRE). We demonstrate that Elk-1, a protein closely related to p62TCF in function, is a nuclear target of two members of the MAP kinase family, ERK1 and ERK2. Phosphorylation of Elk-1 increases the yield of ternary complex in vitro. At least five residues in the C-terminal domain of Elk-1 are phosphorylated upon growth factor stimulation of NIH3T3 cells. These residues are also phosphorylated by purified ERK1 in vitro, as determined by a combination of phosphopeptide sequencing and 2-D peptide mapping. Conversion of two of these phospho-acceptor sites to alanine impairs the formation of ternary complexes by the resulting Elk-1 proteins. Removal of these serine residues also drastically diminishes activation of the c-fos promoter in epidermal growth factor-treated cells. Analogous mutations at other sites impair activation to a lesser extent without affecting ternary complex formation in vitro. Our results indicate that phosphorylation regulates ternary complex formation by Elk-1, which is a prerequisite for the manifestation of its transactivation potential at the c-fos SRE.

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Selected References

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

  1. Alessandrini A., Crews C. M., Erikson R. L. Phorbol ester stimulates a protein-tyrosine/threonine kinase that phosphorylates and activates the Erk-1 gene product. Proc Natl Acad Sci U S A. 1992 Sep 1;89(17):8200–8204. doi: 10.1073/pnas.89.17.8200. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Anderson D., Koch C. A., Grey L., Ellis C., Moran M. F., Pawson T. Binding of SH2 domains of phospholipase C gamma 1, GAP, and Src to activated growth factor receptors. Science. 1990 Nov 16;250(4983):979–982. doi: 10.1126/science.2173144. [DOI] [PubMed] [Google Scholar]
  3. Andersson S., Davis D. L., Dahlbäck H., Jörnvall H., Russell D. W. Cloning, structure, and expression of the mitochondrial cytochrome P-450 sterol 26-hydroxylase, a bile acid biosynthetic enzyme. J Biol Chem. 1989 May 15;264(14):8222–8229. [PubMed] [Google Scholar]
  4. Boulton T. G., Gregory J. S., Cobb M. H. Purification and properties of extracellular signal-regulated kinase 1, an insulin-stimulated microtubule-associated protein 2 kinase. Biochemistry. 1991 Jan 8;30(1):278–286. doi: 10.1021/bi00215a038. [DOI] [PubMed] [Google Scholar]
  5. 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]
  6. Boyle W. J., van der Geer P., Hunter T. Phosphopeptide mapping and phosphoamino acid analysis by two-dimensional separation on thin-layer cellulose plates. Methods Enzymol. 1991;201:110–149. doi: 10.1016/0076-6879(91)01013-r. [DOI] [PubMed] [Google Scholar]
  7. Buday L., Downward J. Epidermal growth factor regulates p21ras through the formation of a complex of receptor, Grb2 adapter protein, and Sos nucleotide exchange factor. Cell. 1993 May 7;73(3):611–620. doi: 10.1016/0092-8674(93)90146-h. [DOI] [PubMed] [Google Scholar]
  8. 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]
  9. Cheng J. T., Cobb M. H., Baer R. Phosphorylation of the TAL1 oncoprotein by the extracellular-signal-regulated protein kinase ERK1. Mol Cell Biol. 1993 Feb;13(2):801–808. doi: 10.1128/mcb.13.2.801. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Dalton S., Treisman R. Characterization of SAP-1, a protein recruited by serum response factor to the c-fos serum response element. Cell. 1992 Feb 7;68(3):597–612. doi: 10.1016/0092-8674(92)90194-h. [DOI] [PubMed] [Google Scholar]
  11. Dérijard B., Hibi M., Wu I. H., Barrett T., Su B., Deng T., Karin M., Davis R. J. JNK1: a protein kinase stimulated by UV light and Ha-Ras that binds and phosphorylates the c-Jun activation domain. Cell. 1994 Mar 25;76(6):1025–1037. doi: 10.1016/0092-8674(94)90380-8. [DOI] [PubMed] [Google Scholar]
  12. Egan S. E., Giddings B. W., Brooks M. W., Buday L., Sizeland A. M., Weinberg R. A. Association of Sos Ras exchange protein with Grb2 is implicated in tyrosine kinase signal transduction and transformation. Nature. 1993 May 6;363(6424):45–51. doi: 10.1038/363045a0. [DOI] [PubMed] [Google Scholar]
  13. Fisch T. M., Prywes R., Roeder R. G. c-fos sequence necessary for basal expression and induction by epidermal growth factor, 12-O-tetradecanoyl phorbol-13-acetate and the calcium ionophore. Mol Cell Biol. 1987 Oct;7(10):3490–3502. doi: 10.1128/mcb.7.10.3490. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Gille H., Sharrocks A. D., Shaw P. E. Phosphorylation of transcription factor p62TCF by MAP kinase stimulates ternary complex formation at c-fos promoter. Nature. 1992 Jul 30;358(6385):414–417. doi: 10.1038/358414a0. [DOI] [PubMed] [Google Scholar]
  15. Gottesman S., Halpern E., Trisler P. Role of sulA and sulB in filamentation by lon mutants of Escherichia coli K-12. J Bacteriol. 1981 Oct;148(1):265–273. doi: 10.1128/jb.148.1.265-273.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Graham R., Gilman M. Distinct protein targets for signals acting at the c-fos serum response element. Science. 1991 Jan 11;251(4990):189–192. doi: 10.1126/science.1898992. [DOI] [PubMed] [Google Scholar]
  17. Guan K. L., Dixon J. E. Eukaryotic proteins expressed in Escherichia coli: an improved thrombin cleavage and purification procedure of fusion proteins with glutathione S-transferase. Anal Biochem. 1991 Feb 1;192(2):262–267. doi: 10.1016/0003-2697(91)90534-z. [DOI] [PubMed] [Google Scholar]
  18. Haycock J. W., Ahn N. G., Cobb M. H., Krebs E. G. ERK1 and ERK2, two microtubule-associated protein 2 kinases, mediate the phosphorylation of tyrosine hydroxylase at serine-31 in situ. Proc Natl Acad Sci U S A. 1992 Mar 15;89(6):2365–2369. doi: 10.1073/pnas.89.6.2365. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Herrera R. E., Shaw P. E., Nordheim A. Occupation of the c-fos serum response element in vivo by a multi-protein complex is unaltered by growth factor induction. Nature. 1989 Jul 6;340(6228):68–70. doi: 10.1038/340068a0. [DOI] [PubMed] [Google Scholar]
  20. Hibi M., Lin A., Smeal T., Minden A., Karin M. Identification of an oncoprotein- and UV-responsive protein kinase that binds and potentiates the c-Jun activation domain. Genes Dev. 1993 Nov;7(11):2135–2148. doi: 10.1101/gad.7.11.2135. [DOI] [PubMed] [Google Scholar]
  21. Hipskind R. A., Rao V. N., Mueller C. G., Reddy E. S., Nordheim A. Ets-related protein Elk-1 is homologous to the c-fos regulatory factor p62TCF. Nature. 1991 Dec 19;354(6354):531–534. doi: 10.1038/354531a0. [DOI] [PubMed] [Google Scholar]
  22. Janknecht R., Ernst W. H., Pingoud V., Nordheim A. Activation of ternary complex factor Elk-1 by MAP kinases. EMBO J. 1993 Dec 15;12(13):5097–5104. doi: 10.1002/j.1460-2075.1993.tb06204.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  23. Janknecht R., Nordheim A. Elk-1 protein domains required for direct and SRF-assisted DNA-binding. Nucleic Acids Res. 1992 Jul 11;20(13):3317–3324. doi: 10.1093/nar/20.13.3317. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Kortenjann M., Thomae O., Shaw P. E. Inhibition of v-raf-dependent c-fos expression and transformation by a kinase-defective mutant of the mitogen-activated protein kinase Erk2. Mol Cell Biol. 1994 Jul;14(7):4815–4824. doi: 10.1128/mcb.14.7.4815. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Lenormand P., Sardet C., Pagès G., L'Allemain G., Brunet A., Pouysségur J. Growth factors induce nuclear translocation of MAP kinases (p42mapk and p44mapk) but not of their activator MAP kinase kinase (p45mapkk) in fibroblasts. J Cell Biol. 1993 Sep;122(5):1079–1088. doi: 10.1083/jcb.122.5.1079. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Lowenstein E. J., Daly R. J., Batzer A. G., Li W., Margolis B., Lammers R., Ullrich A., Skolnik E. Y., Bar-Sagi D., Schlessinger J. The SH2 and SH3 domain-containing protein GRB2 links receptor tyrosine kinases to ras signaling. Cell. 1992 Aug 7;70(3):431–442. doi: 10.1016/0092-8674(92)90167-b. [DOI] [PubMed] [Google Scholar]
  27. Malik R. K., Roe M. W., Blackshear P. J. Epidermal growth factor and other mitogens induce binding of a protein complex to the c-fos serum response element in human astrocytoma and other cells. J Biol Chem. 1991 May 5;266(13):8576–8582. [PubMed] [Google Scholar]
  28. Marais R., Wynne J., Treisman R. The SRF accessory protein Elk-1 contains a growth factor-regulated transcriptional activation domain. Cell. 1993 Apr 23;73(2):381–393. doi: 10.1016/0092-8674(93)90237-k. [DOI] [PubMed] [Google Scholar]
  29. McClain D. A., Maegawa H., Lee J., Dull T. J., Ulrich A., Olefsky J. M. A mutant insulin receptor with defective tyrosine kinase displays no biologic activity and does not undergo endocytosis. J Biol Chem. 1987 Oct 25;262(30):14663–14671. [PubMed] [Google Scholar]
  30. Mueller C. G., Nordheim A. A protein domain conserved between yeast MCM1 and human SRF directs ternary complex formation. EMBO J. 1991 Dec;10(13):4219–4229. doi: 10.1002/j.1460-2075.1991.tb05000.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. 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]
  32. Ostrowski J., Sims J. E., Sibley C. H., Valentine M. A., Dower S. K., Meier K. E., Bomsztyk K. A serine/threonine kinase activity is closely associated with a 65-kDa phosphoprotein specifically recognized by the kappa B enhancer element. J Biol Chem. 1991 Jul 5;266(19):12722–12733. [PubMed] [Google Scholar]
  33. Pognonec P., Boulukos K. E., Ghysdael J. The c-ets-1 protein is chromatin associated and binds to DNA in vitro. Oncogene. 1989 Jun;4(6):691–697. [PubMed] [Google Scholar]
  34. Rossomando A., Wu J., Weber M. J., Sturgill T. W. The phorbol ester-dependent activator of the mitogen-activated protein kinase p42mapk is a kinase with specificity for the threonine and tyrosine regulatory sites. Proc Natl Acad Sci U S A. 1992 Jun 15;89(12):5221–5225. doi: 10.1073/pnas.89.12.5221. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. Rowles J., Slaughter C., Moomaw C., Hsu J., Cobb M. H. Purification of casein kinase I and isolation of cDNAs encoding multiple casein kinase I-like enzymes. Proc Natl Acad Sci U S A. 1991 Nov 1;88(21):9548–9552. doi: 10.1073/pnas.88.21.9548. [DOI] [PMC free article] [PubMed] [Google Scholar]
  36. Rozakis-Adcock M., Fernley R., Wade J., Pawson T., Bowtell D. The SH2 and SH3 domains of mammalian Grb2 couple the EGF receptor to the Ras activator mSos1. Nature. 1993 May 6;363(6424):83–85. doi: 10.1038/363083a0. [DOI] [PubMed] [Google Scholar]
  37. Rozakis-Adcock M., McGlade J., Mbamalu G., Pelicci G., Daly R., Li W., Batzer A., Thomas S., Brugge J., Pelicci P. G. Association of the Shc and Grb2/Sem5 SH2-containing proteins is implicated in activation of the Ras pathway by tyrosine kinases. Nature. 1992 Dec 17;360(6405):689–692. doi: 10.1038/360689a0. [DOI] [PubMed] [Google Scholar]
  38. Sadowski I., Ptashne M. A vector for expressing GAL4(1-147) fusions in mammalian cells. Nucleic Acids Res. 1989 Sep 25;17(18):7539–7539. doi: 10.1093/nar/17.18.7539. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Schröter H., Mueller C. G., Meese K., Nordheim A. Synergism in ternary complex formation between the dimeric glycoprotein p67SRF, polypeptide p62TCF and the c-fos serum response element. EMBO J. 1990 Apr;9(4):1123–1130. doi: 10.1002/j.1460-2075.1990.tb08218.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Shaw P. E., Schröter H., Nordheim A. The ability of a ternary complex to form over the serum response element correlates with serum inducibility of the human c-fos promoter. Cell. 1989 Feb 24;56(4):563–572. doi: 10.1016/0092-8674(89)90579-5. [DOI] [PubMed] [Google Scholar]
  41. Shaw P. E. Ternary complex formation over the c-fos serum response element: p62TCF exhibits dual component specificity with contacts to DNA and an extended structure in the DNA-binding domain of p67SRF. EMBO J. 1992 Aug;11(8):3011–3019. doi: 10.1002/j.1460-2075.1992.tb05371.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  42. Treisman R. The serum response element. Trends Biochem Sci. 1992 Oct;17(10):423–426. doi: 10.1016/0968-0004(92)90013-y. [DOI] [PubMed] [Google Scholar]
  43. Treisman R. Transient accumulation of c-fos RNA following serum stimulation requires a conserved 5' element and c-fos 3' sequences. Cell. 1985 Oct;42(3):889–902. doi: 10.1016/0092-8674(85)90285-5. [DOI] [PubMed] [Google Scholar]
  44. Warne P. H., Viciana P. R., Downward J. Direct interaction of Ras and the amino-terminal region of Raf-1 in vitro. Nature. 1993 Jul 22;364(6435):352–355. doi: 10.1038/364352a0. [DOI] [PubMed] [Google Scholar]
  45. Zinck R., Hipskind R. A., Pingoud V., Nordheim A. c-fos transcriptional activation and repression correlate temporally with the phosphorylation status of TCF. EMBO J. 1993 Jun;12(6):2377–2387. doi: 10.1002/j.1460-2075.1993.tb05892.x. [DOI] [PMC free article] [PubMed] [Google Scholar]

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