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. 1992 Nov 1;89(21):10350–10354. doi: 10.1073/pnas.89.21.10350

IRS-1 activates phosphatidylinositol 3'-kinase by associating with src homology 2 domains of p85.

M G Myers Jr 1, J M Backer 1, X J Sun 1, S Shoelson 1, P Hu 1, J Schlessinger 1, M Yoakim 1, B Schaffhausen 1, M F White 1
PMCID: PMC50336  PMID: 1332046

Abstract

IRS-1 is an insulin receptor substrate that undergoes tyrosine phosphorylation and associates with the phosphatidylinositol (PtdIns) 3'-kinase immediately after insulin stimulation. Recombinant IRS-1 protein was tyrosine phosphorylated by the insulin receptor in vitro and associated with the PtdIns 3'-kinase from lysates of quiescent 3T3 fibroblasts. Bacterial fusion proteins containing the src homology 2 domains (SH2 domains) of the 85-kDa subunit (p85) of the PtdIns 3'-kinase bound quantitatively to tyrosine phosphorylated, but not unphosphorylated, IRS-1, and this association was blocked by phosphotyrosine-containing synthetic peptides. Moreover, the phosphorylated peptides and the SH2 domains each inhibited binding of PtdIns 3'-kinase to IRS-1. Phosphorylated IRS-1 activated PtdIns 3'-kinase in anti-p85 immunoprecipitates in vitro, and this activation was blocked by SH2 domain fusion proteins. These data suggest that the interaction between PtdIns 3'-kinase and IRS-1 is mediated by tyrosine phosphorylated motifs on IRS-1 and the SH2 domains of p85, and IRS-1 activates PtdIns 3'-kinase by binding to the SH2 domains of p85. Thus, IRS-1 likely serves to transmit the insulin signal by binding and regulating intracellular enzymes containing SH2 domains.

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Selected References

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

  1. Auersperg N., Pawson T., Worth A., Weinmaster G. Modifications of tumor histology by point mutations in the v-fps oncogene: possible role of extracellular matrix. Cancer Res. 1987 Dec 1;47(23):6341–6348. [PubMed] [Google Scholar]
  2. Auger K. R., Carpenter C. L., Shoelson S. E., Piwnica-Worms H., Cantley L. C. Polyoma virus middle T antigen-pp60c-src complex associates with purified phosphatidylinositol 3-kinase in vitro. J Biol Chem. 1992 Mar 15;267(8):5408–5415. [PubMed] [Google Scholar]
  3. Backer J. M., Myers M. G., Jr, Shoelson S. E., Chin D. J., Sun X. J., Miralpeix M., Hu P., Margolis B., Skolnik E. Y., Schlessinger J. Phosphatidylinositol 3'-kinase is activated by association with IRS-1 during insulin stimulation. EMBO J. 1992 Sep;11(9):3469–3479. doi: 10.1002/j.1460-2075.1992.tb05426.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Backer J. M., Schroeder G. G., Kahn C. R., Myers M. G., Jr, Wilden P. A., Cahill D. A., White M. F. Insulin stimulation of phosphatidylinositol 3-kinase activity maps to insulin receptor regions required for endogenous substrate phosphorylation. J Biol Chem. 1992 Jan 15;267(2):1367–1374. [PubMed] [Google Scholar]
  5. Cantley L. C., Auger K. R., Carpenter C., Duckworth B., Graziani A., Kapeller R., Soltoff S. Oncogenes and signal transduction. Cell. 1991 Jan 25;64(2):281–302. doi: 10.1016/0092-8674(91)90639-g. [DOI] [PubMed] [Google Scholar]
  6. Chou C. K., Dull T. J., Russell D. S., Gherzi R., Lebwohl D., Ullrich A., Rosen O. M. Human insulin receptors mutated at the ATP-binding site lack protein tyrosine kinase activity and fail to mediate postreceptor effects of insulin. J Biol Chem. 1987 Feb 5;262(4):1842–1847. [PubMed] [Google Scholar]
  7. Escobedo J. A., Kaplan D. R., Kavanaugh W. M., Turck C. W., Williams L. T. A phosphatidylinositol-3 kinase binds to platelet-derived growth factor receptors through a specific receptor sequence containing phosphotyrosine. Mol Cell Biol. 1991 Feb;11(2):1125–1132. doi: 10.1128/mcb.11.2.1125. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Escobedo J. A., Kaplan D. R., Kavanaugh W. M., Turck C. W., Williams L. T. A phosphatidylinositol-3 kinase binds to platelet-derived growth factor receptors through a specific receptor sequence containing phosphotyrosine. Mol Cell Biol. 1991 Feb;11(2):1125–1132. doi: 10.1128/mcb.11.2.1125. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Escobedo J. A., Navankasattusas S., Kavanaugh W. M., Milfay D., Fried V. A., Williams L. T. cDNA cloning of a novel 85 kd protein that has SH2 domains and regulates binding of PI3-kinase to the PDGF beta-receptor. Cell. 1991 Apr 5;65(1):75–82. doi: 10.1016/0092-8674(91)90409-r. [DOI] [PubMed] [Google Scholar]
  10. Hu P., Margolis B., Skolnik E. Y., Lammers R., Ullrich A., Schlessinger J. Interaction of phosphatidylinositol 3-kinase-associated p85 with epidermal growth factor and platelet-derived growth factor receptors. Mol Cell Biol. 1992 Mar;12(3):981–990. doi: 10.1128/mcb.12.3.981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Kahn C. R., White M. F. The insulin receptor and the molecular mechanism of insulin action. J Clin Invest. 1988 Oct;82(4):1151–1156. doi: 10.1172/JCI113711. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Kaplan D. R., Whitman M., Schaffhausen B., Pallas D. C., White M., Cantley L., Roberts T. M. Common elements in growth factor stimulation and oncogenic transformation: 85 kd phosphoprotein and phosphatidylinositol kinase activity. Cell. 1987 Sep 25;50(7):1021–1029. doi: 10.1016/0092-8674(87)90168-1. [DOI] [PubMed] [Google Scholar]
  13. Koch C. A., Anderson D., Moran M. F., Ellis C., Pawson T. SH2 and SH3 domains: elements that control interactions of cytoplasmic signaling proteins. Science. 1991 May 3;252(5006):668–674. doi: 10.1126/science.1708916. [DOI] [PubMed] [Google Scholar]
  14. Otsu M., Hiles I., Gout I., Fry M. J., Ruiz-Larrea F., Panayotou G., Thompson A., Dhand R., Hsuan J., Totty N. Characterization of two 85 kd proteins that associate with receptor tyrosine kinases, middle-T/pp60c-src complexes, and PI3-kinase. Cell. 1991 Apr 5;65(1):91–104. doi: 10.1016/0092-8674(91)90411-q. [DOI] [PubMed] [Google Scholar]
  15. Rothenberg P. L., Lane W. S., Karasik A., Backer J., White M., Kahn C. R. Purification and partial sequence analysis of pp185, the major cellular substrate of the insulin receptor tyrosine kinase. J Biol Chem. 1991 May 5;266(13):8302–8311. [PubMed] [Google Scholar]
  16. Ruderman N. B., Kapeller R., White M. F., Cantley L. C. Activation of phosphatidylinositol 3-kinase by insulin. Proc Natl Acad Sci U S A. 1990 Feb;87(4):1411–1415. doi: 10.1073/pnas.87.4.1411. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Shoelson S. E., Chatterjee S., Chaudhuri M., White M. F. YMXM motifs of IRS-1 define substrate specificity of the insulin receptor kinase. Proc Natl Acad Sci U S A. 1992 Mar 15;89(6):2027–2031. doi: 10.1073/pnas.89.6.2027. [DOI] [PMC free article] [PubMed] [Google Scholar]
  18. Skolnik E. Y., Margolis B., Mohammadi M., Lowenstein E., Fischer R., Drepps A., Ullrich A., Schlessinger J. Cloning of PI3 kinase-associated p85 utilizing a novel method for expression/cloning of target proteins for receptor tyrosine kinases. Cell. 1991 Apr 5;65(1):83–90. doi: 10.1016/0092-8674(91)90410-z. [DOI] [PubMed] [Google Scholar]
  19. Sun X. J., Rothenberg P., Kahn C. R., Backer J. M., Araki E., Wilden P. A., Cahill D. A., Goldstein B. J., White M. F. Structure of the insulin receptor substrate IRS-1 defines a unique signal transduction protein. Nature. 1991 Jul 4;352(6330):73–77. doi: 10.1038/352073a0. [DOI] [PubMed] [Google Scholar]
  20. White M. F., Backer J. M. Preparation and use of anti-phosphotyrosine antibodies to study structure and function of insulin receptor. Methods Enzymol. 1991;201:65–79. doi: 10.1016/0076-6879(91)01009-q. [DOI] [PubMed] [Google Scholar]
  21. White M. F., Maron R., Kahn C. R. Insulin rapidly stimulates tyrosine phosphorylation of a Mr-185,000 protein in intact cells. Nature. 1985 Nov 14;318(6042):183–186. doi: 10.1038/318183a0. [DOI] [PubMed] [Google Scholar]
  22. Whittaker J., Okamoto A. K., Thys R., Bell G. I., Steiner D. F., Hofmann C. A. High-level expression of human insulin receptor cDNA in mouse NIH 3T3 cells. Proc Natl Acad Sci U S A. 1987 Aug;84(15):5237–5241. doi: 10.1073/pnas.84.15.5237. [DOI] [PMC free article] [PubMed] [Google Scholar]

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