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. 1990 Apr;87(8):3042–3046. doi: 10.1073/pnas.87.8.3042

Farnesol modification of Kirsten-ras exon 4B protein is essential for transformation.

J H Jackson 1, C G Cochrane 1, J R Bourne 1, P A Solski 1, J E Buss 1, C J Der 1
PMCID: PMC53830  PMID: 2183224

Abstract

Oncogenic forms of ras proteins are synthesized in the cytosol and must become membrane associated to cause malignant transformation. Palmitic acid and an isoprenoid (farnesol) intermediate in cholesterol biosynthesis are attached to separate cysteine residues near the C termini of H-ras, N-ras, and Kirsten-ras (K-ras) exon 4A-encoded proteins. These lipid modifications have been suggested to promote or stabilize the association of ras proteins with membranes. Because preventing isoprenylation also prevents palmitoylation, examining the importance of isoprenylation alone has not been possible. However, the oncogenic human [Val12]K-ras 4B protein is not palmitoylated but is isoprenylated, membrane associated, and fully transforming. We therefore constructed mutant [Val12]K-ras 4B proteins that were not isoprenylated to examine the effects of isoprenylation in the absence of palmitoylation. The nonisoprenylated mutant proteins both failed to associate with membranes and did not transform NIH 3T3 cells. In addition, inhibition of isoprenoid and cholesterol synthesis with the drug compactin also decreased [Val12]K-ras 4B protein isoprenylation and membrane association. These results unequivocally demonstrate that isoprenylation, rather than palmitoylation, is essential for ras membrane binding and ras transforming activity. These findings clearly indicate the biological significance of ras protein modification by farnesol and suggest that this modification may be important for facilitating the processing, trafficking, and biological activity of other isoprenylated proteins. Because K-ras is the most frequently activated oncogene in a wide spectrum of human malignancies, study of this pathway could lead to important therapeutic treatments.

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Selected References

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

  1. Anderegg R. J., Betz R., Carr S. A., Crabb J. W., Duntze W. Structure of Saccharomyces cerevisiae mating hormone a-factor. Identification of S-farnesyl cysteine as a structural component. J Biol Chem. 1988 Dec 5;263(34):18236–18240. [PubMed] [Google Scholar]
  2. Barbacid M. ras genes. Annu Rev Biochem. 1987;56:779–827. doi: 10.1146/annurev.bi.56.070187.004023. [DOI] [PubMed] [Google Scholar]
  3. Beck L. A., Hosick T. J., Sinensky M. Incorporation of a product of mevalonic acid metabolism into proteins of Chinese hamster ovary cell nuclei. J Cell Biol. 1988 Oct;107(4):1307–1316. doi: 10.1083/jcb.107.4.1307. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Buss J. E., Sefton B. M. Direct identification of palmitic acid as the lipid attached to p21ras. Mol Cell Biol. 1986 Jan;6(1):116–122. doi: 10.1128/mcb.6.1.116. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Buss J. E., Solski P. A., Schaeffer J. P., MacDonald M. J., Der C. J. Activation of the cellular proto-oncogene product p21Ras by addition of a myristylation signal. Science. 1989 Mar 24;243(4898):1600–1603. doi: 10.1126/science.2648572. [DOI] [PubMed] [Google Scholar]
  6. Capon D. J., Seeburg P. H., McGrath J. P., Hayflick J. S., Edman U., Levinson A. D., Goeddel D. V. Activation of Ki-ras2 gene in human colon and lung carcinomas by two different point mutations. Nature. 1983 Aug 11;304(5926):507–513. doi: 10.1038/304507a0. [DOI] [PubMed] [Google Scholar]
  7. Casey P. J., Solski P. A., Der C. J., Buss J. E. p21ras is modified by a farnesyl isoprenoid. Proc Natl Acad Sci U S A. 1989 Nov;86(21):8323–8327. doi: 10.1073/pnas.86.21.8323. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Chardin P., Tavitian A. The ral gene: a new ras related gene isolated by the use of a synthetic probe. EMBO J. 1986 Sep;5(9):2203–2208. doi: 10.1002/j.1460-2075.1986.tb04485.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Clarke S., Vogel J. P., Deschenes R. J., Stock J. Posttranslational modification of the Ha-ras oncogene protein: evidence for a third class of protein carboxyl methyltransferases. Proc Natl Acad Sci U S A. 1988 Jul;85(13):4643–4647. doi: 10.1073/pnas.85.13.4643. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Farnsworth C. C., Wolda S. L., Gelb M. H., Glomset J. A. Human lamin B contains a farnesylated cysteine residue. J Biol Chem. 1989 Dec 5;264(34):20422–20429. [PMC free article] [PubMed] [Google Scholar]
  11. Gautam N., Baetscher M., Aebersold R., Simon M. I. A G protein gamma subunit shares homology with ras proteins. Science. 1989 May 26;244(4907):971–974. doi: 10.1126/science.2499046. [DOI] [PubMed] [Google Scholar]
  12. Gibbs J. B., Schaber M. D., Marshall M. S., Scolnick E. M., Sigal I. S. Identification of guanine nucleotides bound to ras-encoded proteins in growing yeast cells. J Biol Chem. 1987 Aug 5;262(22):10426–10429. [PubMed] [Google Scholar]
  13. Gutierrez L., Magee A. I., Marshall C. J., Hancock J. F. Post-translational processing of p21ras is two-step and involves carboxyl-methylation and carboxy-terminal proteolysis. EMBO J. 1989 Apr;8(4):1093–1098. doi: 10.1002/j.1460-2075.1989.tb03478.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Hancock J. F., Magee A. I., Childs J. E., Marshall C. J. All ras proteins are polyisoprenylated but only some are palmitoylated. Cell. 1989 Jun 30;57(7):1167–1177. doi: 10.1016/0092-8674(89)90054-8. [DOI] [PubMed] [Google Scholar]
  15. Kaneko I., Hazama-Shimada Y., Endo A. Inhibitory effects on lipid metabolism in cultured cells of ML-236B, a potent inhibitor of 3-hydroxy-3-methylglutaryl-coenzyme-A reductase. Eur J Biochem. 1978 Jun 15;87(2):313–321. doi: 10.1111/j.1432-1033.1978.tb12380.x. [DOI] [PubMed] [Google Scholar]
  16. Madaule P., Axel R., Myers A. M. Characterization of two members of the rho gene family from the yeast Saccharomyces cerevisiae. Proc Natl Acad Sci U S A. 1987 Feb;84(3):779–783. doi: 10.1073/pnas.84.3.779. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Magee T., Hanley M. Protein modification. Sticky fingers and CAAX boxes. Nature. 1988 Sep 8;335(6186):114–115. doi: 10.1038/335114a0. [DOI] [PubMed] [Google Scholar]
  18. McCoy M. S., Bargmann C. I., Weinberg R. A. Human colon carcinoma Ki-ras2 oncogene and its corresponding proto-oncogene. Mol Cell Biol. 1984 Aug;4(8):1577–1582. doi: 10.1128/mcb.4.8.1577. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Nakano E. T., Rao M. M., Perucho M., Inouye M. Expression of the Kirsten ras viral and human proteins in Escherichia coli. J Virol. 1987 Feb;61(2):302–307. doi: 10.1128/jvi.61.2.302-307.1987. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Powers S., Michaelis S., Broek D., Santa Anna S., Field J., Herskowitz I., Wigler M. RAM, a gene of yeast required for a functional modification of RAS proteins and for production of mating pheromone a-factor. Cell. 1986 Nov 7;47(3):413–422. doi: 10.1016/0092-8674(86)90598-2. [DOI] [PubMed] [Google Scholar]
  21. Satoh T., Endo M., Nakamura S., Kaziro Y. Analysis of guanine nucleotide bound to ras protein in PC12 cells. FEBS Lett. 1988 Aug 15;236(1):185–189. doi: 10.1016/0014-5793(88)80311-9. [DOI] [PubMed] [Google Scholar]
  22. Schafer W. R., Kim R., Sterne R., Thorner J., Kim S. H., Rine J. Genetic and pharmacological suppression of oncogenic mutations in ras genes of yeast and humans. Science. 1989 Jul 28;245(4916):379–385. doi: 10.1126/science.2569235. [DOI] [PubMed] [Google Scholar]
  23. Shimizu K., Birnbaum D., Ruley M. A., Fasano O., Suard Y., Edlund L., Taparowsky E., Goldfarb M., Wigler M. Structure of the Ki-ras gene of the human lung carcinoma cell line Calu-1. Nature. 1983 Aug 11;304(5926):497–500. doi: 10.1038/304497a0. [DOI] [PubMed] [Google Scholar]
  24. Trahey M., McCormick F. A cytoplasmic protein stimulates normal N-ras p21 GTPase, but does not affect oncogenic mutants. Science. 1987 Oct 23;238(4826):542–545. doi: 10.1126/science.2821624. [DOI] [PubMed] [Google Scholar]
  25. Willumsen B. M., Norris K., Papageorge A. G., Hubbert N. L., Lowy D. R. Harvey murine sarcoma virus p21 ras protein: biological and biochemical significance of the cysteine nearest the carboxy terminus. EMBO J. 1984 Nov;3(11):2581–2585. doi: 10.1002/j.1460-2075.1984.tb02177.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Wolda S. L., Glomset J. A. Evidence for modification of lamin B by a product of mevalonic acid. J Biol Chem. 1988 May 5;263(13):5997–6000. [PubMed] [Google Scholar]

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