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. 1986 May;58(2):468–474. doi: 10.1128/jvi.58.2.468-474.1986

The absence of myristic acid decreases membrane binding of p60src but does not affect tyrosine protein kinase activity.

J E Buss, M P Kamps, K Gould, B M Sefton
PMCID: PMC252933  PMID: 3009860

Abstract

We have constructed two point mutants of Rous sarcoma virus in which the amino-terminal glycine residue of the transforming protein, p60src, was changed to an alanine or a glutamic acid residue. Both mutant proteins failed to become myristylated and, more importantly, no longer transformed cells. The lack of transformation could not be attributed to defects in the catalytic activity of the mutant p60src proteins. In vitro phosphorylation of the peptide angiotensin or of the cellular substrate proteins enolase and p36 revealed no significant differences in the Km or specific activity of the mutant and wild-type p60src proteins. However, when cellular fractions were prepared, less than 12% of the nonmyristylated p60src proteins was bound to membranes. In contrast, more than 82% of the wild-type protein was associated with membranes. Wild-type p60src was phosphorylated by protein kinase C, a protein kinase which associates with membranes when activated. The mutant proteins were not. This finding supports the idea that within the intact cell the nonmyristylated p60src proteins are cytoplasmic and suggests that this apparent solubility is not an artifact of the cell fractionation procedure. The myristyl groups of p60src apparently encourages a tight association between protein and membranes and, by determining the cellular location of the enzyme, allows transformation to occur.

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Selected References

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

  1. Aitken A., Cohen P., Santikarn S., Williams D. H., Calder A. G., Smith A., Klee C. B. Identification of the NH2-terminal blocking group of calcineurin B as myristic acid. FEBS Lett. 1982 Dec 27;150(2):314–318. doi: 10.1016/0014-5793(82)80759-x. [DOI] [PubMed] [Google Scholar]
  2. Beemon K., Hunter T. Characterization of Rous sarcoma virus src gene products synthesized in vitro. J Virol. 1978 Nov;28(2):551–566. doi: 10.1128/jvi.28.2.551-566.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Brugge J., Yonemoto W., Darrow D. Interaction between the Rous sarcoma virus transforming protein and two cellular phosphoproteins: analysis of the turnover and distribution of this complex. Mol Cell Biol. 1983 Jan;3(1):9–19. doi: 10.1128/mcb.3.1.9. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Buss J. E., Sefton B. M. Myristic acid, a rare fatty acid, is the lipid attached to the transforming protein of Rous sarcoma virus and its cellular homolog. J Virol. 1985 Jan;53(1):7–12. doi: 10.1128/jvi.53.1.7-12.1985. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Carr S. A., Biemann K., Shoji S., Parmelee D. C., Titani K. n-Tetradecanoyl is the NH2-terminal blocking group of the catalytic subunit of cyclic AMP-dependent protein kinase from bovine cardiac muscle. Proc Natl Acad Sci U S A. 1982 Oct;79(20):6128–6131. doi: 10.1073/pnas.79.20.6128. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Cleveland D. W., Fischer S. G., Kirschner M. W., Laemmli U. K. Peptide mapping by limited proteolysis in sodium dodecyl sulfate and analysis by gel electrophoresis. J Biol Chem. 1977 Feb 10;252(3):1102–1106. [PubMed] [Google Scholar]
  7. Collett M. S., Erikson E., Erikson R. L. Structural analysis of the avian sarcoma virus transforming protein: sites of phosphorylation. J Virol. 1979 Feb;29(2):770–781. doi: 10.1128/jvi.29.2.770-781.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Collett M. S., Purchio A. F., Erikson R. L. Avian sarcoma virus-transforming protein, pp60src shows protein kinase activity specific for tyrosine. Nature. 1980 May 15;285(5761):167–169. doi: 10.1038/285167a0. [DOI] [PubMed] [Google Scholar]
  9. Cooper J. A., Esch F. S., Taylor S. S., Hunter T. Phosphorylation sites in enolase and lactate dehydrogenase utilized by tyrosine protein kinases in vivo and in vitro. J Biol Chem. 1984 Jun 25;259(12):7835–7841. [PubMed] [Google Scholar]
  10. Cooper J. A., Reiss N. A., Schwartz R. J., Hunter T. Three glycolytic enzymes are phosphorylated at tyrosine in cells transformed by Rous sarcoma virus. Nature. 1983 Mar 17;302(5905):218–223. doi: 10.1038/302218a0. [DOI] [PubMed] [Google Scholar]
  11. Courtneidge S. A., Bishop J. M. Transit of pp60v-src to the plasma membrane. Proc Natl Acad Sci U S A. 1982 Dec;79(23):7117–7121. doi: 10.1073/pnas.79.23.7117. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Courtneidge S. A., Levinson A. D., Bishop J. M. The protein encoded by the transforming gene of avian sarcoma virus (pp60src) and a homologous protein in normal cells (pp60proto-src) are associated with the plasma membrane. Proc Natl Acad Sci U S A. 1980 Jul;77(7):3783–3787. doi: 10.1073/pnas.77.7.3783. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Cross F. R., Garber E. A., Pellman D., Hanafusa H. A short sequence in the p60src N terminus is required for p60src myristylation and membrane association and for cell transformation. Mol Cell Biol. 1984 Sep;4(9):1834–1842. doi: 10.1128/mcb.4.9.1834. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Erikson E., Erikson R. L. Identification of a cellular protein substrate phosphorylated by the avian sarcoma virus-transforming gene product. Cell. 1980 Oct;21(3):829–836. doi: 10.1016/0092-8674(80)90446-8. [DOI] [PubMed] [Google Scholar]
  15. Garber E. A., Cross F. R., Hanafusa H. Processing of p60v-src to its myristylated membrane-bound form. Mol Cell Biol. 1985 Oct;5(10):2781–2788. doi: 10.1128/mcb.5.10.2781. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Garber E. A., Krueger J. G., Goldberg A. R. Novel localization of pp60src in Rous sarcoma virus-transformed rat and goat cells and in chicken cells transformed by viruses rescued from these mammalian cells. Virology. 1982 Apr 30;118(2):419–429. doi: 10.1016/0042-6822(82)90361-0. [DOI] [PubMed] [Google Scholar]
  17. Glenney J. R., Jr Phosphorylation of p36 in vitro with pp60src. Regulation by Ca2+ and phospholipid. FEBS Lett. 1985 Nov 11;192(1):79–82. doi: 10.1016/0014-5793(85)80047-8. [DOI] [PubMed] [Google Scholar]
  18. Gould K. L., Woodgett J. R., Cooper J. A., Buss J. E., Shalloway D., Hunter T. Protein kinase C phosphorylates pp60src at a novel site. Cell. 1985 Oct;42(3):849–857. doi: 10.1016/0092-8674(85)90281-8. [DOI] [PubMed] [Google Scholar]
  19. Henderson L. E., Krutzsch H. C., Oroszlan S. Myristyl amino-terminal acylation of murine retrovirus proteins: an unusual post-translational proteins modification. Proc Natl Acad Sci U S A. 1983 Jan;80(2):339–343. doi: 10.1073/pnas.80.2.339. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Hunter T., Sefton B. M. Transforming gene product of Rous sarcoma virus phosphorylates tyrosine. Proc Natl Acad Sci U S A. 1980 Mar;77(3):1311–1315. doi: 10.1073/pnas.77.3.1311. [DOI] [PMC free article] [PubMed] [Google Scholar]
  21. Kamps M. P., Buss J. E., Sefton B. M. Mutation of NH2-terminal glycine of p60src prevents both myristoylation and morphological transformation. Proc Natl Acad Sci U S A. 1985 Jul;82(14):4625–4628. doi: 10.1073/pnas.82.14.4625. [DOI] [PMC free article] [PubMed] [Google Scholar]
  22. Krueger J. G., Wang E., Goldberg A. R. Evidence that the src gene product of Rous sarcoma virus is membrane associated. Virology. 1980 Feb;101(1):25–40. doi: 10.1016/0042-6822(80)90480-8. [DOI] [PubMed] [Google Scholar]
  23. Krzyzek R. A., Mitchell R. L., Lau A. F., Faras A. J. Association of pp60src and src protein kinase activity with the plasma membrane of nonpermissive and permissive avian sarcoma virus-infected cells. J Virol. 1980 Dec;36(3):805–815. doi: 10.1128/jvi.36.3.805-815.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  24. Levinson A. D., Oppermann H., Varmus H. E., Bishop J. M. The purified product of the transforming gene of avian sarcoma virus phosphorylates tyrosine. J Biol Chem. 1980 Dec 25;255(24):11973–11980. [PubMed] [Google Scholar]
  25. Magee A. I., Courtneidge S. A. Two classes of fatty acid acylated proteins exist in eukaryotic cells. EMBO J. 1985 May;4(5):1137–1144. doi: 10.1002/j.1460-2075.1985.tb03751.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Nishizuka Y. The role of protein kinase C in cell surface signal transduction and tumour promotion. Nature. 1984 Apr 19;308(5961):693–698. doi: 10.1038/308693a0. [DOI] [PubMed] [Google Scholar]
  27. Olson E. N., Towler D. A., Glaser L. Specificity of fatty acid acylation of cellular proteins. J Biol Chem. 1985 Mar 25;260(6):3784–3790. [PubMed] [Google Scholar]
  28. Oppermann H., Levinson W., Bishop J. M. A cellular protein that associates with the transforming protein of Rous sarcoma virus is also a heat-shock protein. Proc Natl Acad Sci U S A. 1981 Feb;78(2):1067–1071. doi: 10.1073/pnas.78.2.1067. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Ozols J., Carr S. A., Strittmatter P. Identification of the NH2-terminal blocking group of NADH-cytochrome b5 reductase as myristic acid and the complete amino acid sequence of the membrane-binding domain. J Biol Chem. 1984 Nov 10;259(21):13349–13354. [PubMed] [Google Scholar]
  30. Patschinsky T., Hunter T., Esch F. S., Cooper J. A., Sefton B. M. Analysis of the sequence of amino acids surrounding sites of tyrosine phosphorylation. Proc Natl Acad Sci U S A. 1982 Feb;79(4):973–977. doi: 10.1073/pnas.79.4.973. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Pellman D., Garber E. A., Cross F. R., Hanafusa H. Fine structural mapping of a critical NH2-terminal region of p60src. Proc Natl Acad Sci U S A. 1985 Mar;82(6):1623–1627. doi: 10.1073/pnas.82.6.1623. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Purchio A. F., Shoyab M., Gentry L. E. Site-specific increased phosphorylation of pp60v-src after treatment of RSV-transformed cells with a tumor promoter. Science. 1985 Sep 27;229(4720):1393–1395. doi: 10.1126/science.2994221. [DOI] [PubMed] [Google Scholar]
  33. Radke K., Gilmore T., Martin G. S. Transformation by Rous sarcoma virus: a cellular substrate for transformation-specific protein phosphorylation contains phosphotyrosine. Cell. 1980 Oct;21(3):821–828. doi: 10.1016/0092-8674(80)90445-6. [DOI] [PubMed] [Google Scholar]
  34. Resh M. D., Erikson R. L. Highly specific antibody to Rous sarcoma virus src gene product recognizes a novel population of pp60v-src and pp60c-src molecules. J Cell Biol. 1985 Feb;100(2):409–417. doi: 10.1083/jcb.100.2.409. [DOI] [PMC free article] [PubMed] [Google Scholar]
  35. Schultz A. M., Henderson L. E., Oroszlan S., Garber E. A., Hanafusa H. Amino terminal myristylation of the protein kinase p60src, a retroviral transforming protein. Science. 1985 Jan 25;227(4685):427–429. doi: 10.1126/science.3917576. [DOI] [PubMed] [Google Scholar]
  36. Schultz A. M., Oroszlan S. In vivo modification of retroviral gag gene-encoded polyproteins by myristic acid. J Virol. 1983 May;46(2):355–361. doi: 10.1128/jvi.46.2.355-361.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  37. Schwartz D. E., Tizard R., Gilbert W. Nucleotide sequence of Rous sarcoma virus. Cell. 1983 Mar;32(3):853–869. doi: 10.1016/0092-8674(83)90071-5. [DOI] [PubMed] [Google Scholar]
  38. Sefton B. M., Beemon K., Hunter T. Comparison of the expression of the src gene of Rous sarcoma virus in vitro and in vivo. J Virol. 1978 Dec;28(3):957–971. doi: 10.1128/jvi.28.3.957-971.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
  39. Sefton B. M., Hunter T., Beemon K. Temperature-sensitive transformation by Rous sarcoma virus and temperature-sensitive protein kinase activity. J Virol. 1980 Jan;33(1):220–229. doi: 10.1128/jvi.33.1.220-229.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  40. Sefton B. M., Walter G. Antiserum specific for the carboxy terminus of the transforming protein of Rous sarcoma virus. J Virol. 1982 Nov;44(2):467–474. doi: 10.1128/jvi.44.2.467-474.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  41. Smart J. E., Oppermann H., Czernilofsky A. P., Purchio A. F., Erikson R. L., Bishop J. M. Characterization of sites for tyrosine phosphorylation in the transforming protein of Rous sarcoma virus (pp60v-src) and its normal cellular homologue (pp60c-src). Proc Natl Acad Sci U S A. 1981 Oct;78(10):6013–6017. doi: 10.1073/pnas.78.10.6013. [DOI] [PMC free article] [PubMed] [Google Scholar]
  42. Tsunasawa S., Stewart J. W., Sherman F. Amino-terminal processing of mutant forms of yeast iso-1-cytochrome c. The specificities of methionine aminopeptidase and acetyltransferase. J Biol Chem. 1985 May 10;260(9):5382–5391. [PubMed] [Google Scholar]
  43. Verma I. M., Baltimore D. Purification of the RNA-directed DNA polymerase from avian myeloblastosis virus and its assay with polynucleotide templates. Methods Enzymol. 1974;29:125–130. doi: 10.1016/0076-6879(74)29015-3. [DOI] [PubMed] [Google Scholar]
  44. Wong T. W., Goldberg A. R. In vitro phosphorylation of angiotensin analogs by tyrosyl protein kinases. J Biol Chem. 1983 Jan 25;258(2):1022–1025. [PubMed] [Google Scholar]

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