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Analysis of Chemotaxis in Dictyostelium

Protocol
Part of the Methods in Molecular Biology book series (MIMB, volume 757)

Abstract

Dictyostelium discoideum is an excellent model organism for the study of directed cell migration, since Dictyostelium cells show robust chemotactic responses to the chemoattractant cAMP. Many powerful experimental tools are applicable, including forward and reverse genetics, biochemistry, microscopy, and proteomics. Recent studies have demonstrated that many components involved in chemotaxis are functionally conserved between human neutrophils and Dictyostelium amoebae. In this chapter, we describe how to define the functions of proteins that mediate and regulate cell motility, cell polarity, and directional sensing during chemotaxis in Dictyostelium.

Key words

Dictyostelium Chemotaxis Intracellular signaling Cell migration 

References

  1. 1.
    Kae, H., Lim, C.J., Spiegelman, G.B., Weeks, G. (2004) Chemoattractant-induced Ras activation during Dictyostelium aggregation. EMBO Rep. 5, 602–606.PubMedCrossRefGoogle Scholar
  2. 2.
    Parent, C.A., Devreotes, P.N. (1996) Molecular genetics of signal transduction in Dictyostelium. Annu. Rev. Biochem. 65, 411–440.PubMedCrossRefGoogle Scholar
  3. 3.
    Janetopoulos, C., Jin, T., Devreotes, P. (2001) Receptor-mediated activation of heterotrimeric G-proteins in living cells. Science 291, 2408–2411.PubMedCrossRefGoogle Scholar
  4. 4.
    Xu, X., Meier-Schellersheim, M., Jiao, X., Nelson, L.E., Jin, T. (2005) Quantitative imaging of single live cells reveals spatiotem­poral dynamics of multistep signaling events of chemoattractant gradient sensing in Dictyostelium. Mol. Biol. Cell 16, 676–688.PubMedCrossRefGoogle Scholar
  5. 5.
    Parent, C.A., Blacklock, B.J., Froehlich, W.M., Murphy, D.B., Devreotes, P.N. (1998) G protein signaling events are activated at the leading edge of chemotactic cells. Cell 95, 81–91.PubMedCrossRefGoogle Scholar
  6. 6.
    Meili, R., Ellsworth, C., Lee, S., Reddy, T.B., Ma, H., Firtel, R.A. (1999) Chemoattractant-mediated transient activation and membrane localization of Akt/PKB is required for efficient chemotaxis to cAMP in Dictyostelium. EMBO J. 18, 2092–2105.PubMedCrossRefGoogle Scholar
  7. 7.
    Funamoto, S., Milan, K,. Meili, R., Firtel, R.A. (2001) Role of phosphatidylinositol 3′ kinase and a downstream pleckstrin homology domain-containing protein in controlling chemotaxis in dictyostelium. J. Cell Biol. 153, 795–810.PubMedCrossRefGoogle Scholar
  8. 8.
    Funamoto, S., Meili, R., Lee, S., Parry, L., Firtel, R.A. (2002) Spatial and temporal regulation of 3-phosphoinositides by PI 3-kinase and PTEN mediates chemotaxis. Cell 109, 611–623.PubMedCrossRefGoogle Scholar
  9. 9.
    Iijima, M., Devreotes, P. (2002) Tumor suppressor PTEN mediates sensing of chemoattractant gradients. Cell 109, 599–610.PubMedCrossRefGoogle Scholar
  10. 10.
    Iijima, M., Huang, Y.E., Luo, H.R., Vazquez, F., Devreotes, P.N. (2004) Novel mechanism of PTEN regulation by its phosphatidylinositol 4,5-bisphosphate binding motif is critical for chemotaxis. J. Biol. Chem. 279, 16606–16613.PubMedCrossRefGoogle Scholar
  11. 11.
    Huang, Y.E., Iijima, M., Parent, C.A., Funamoto, S., Firtel, R.A., Devreotes, P. (2003) Receptor-mediated regulation of PI3Ks confines PI(3,4,5)P3 to the leading edge of chemotaxing cells. Mol. Biol. Cell. 14, 1913–1922.PubMedCrossRefGoogle Scholar
  12. 12.
    Meili, R., Ellsworth, C., Firtel, R.A. (2000) A novel Akt/PKB-related kinase is essential for morphogenesis in Dictyostelium. Curr. Biol. 10, 708–717.PubMedCrossRefGoogle Scholar
  13. 13.
    Kamimura, Y., Xiong, Y., Iglesias, P.A., Hoeller, O., Bolourani, P., Devreotes, P.N. (2008) PIP3-independent activation of TorC2 and PKB at the cell’s leading edge mediates chemotaxis. Curr. Biol. 18, 1034–1043.PubMedCrossRefGoogle Scholar
  14. 14.
    Kamimura, Y., Devreotes, P.N. (2010) Phosphoinositide dependent protein kinase (PDK) activity regulates PIP3-dependent and -independent protein kinase B activation and chemotaxis. J. Biol. Chem. 285, 79387946.PubMedCrossRefGoogle Scholar
  15. 15.
    Chen, M.Y., Long, Y., Devreotes, P.N. (1997) A novel cytosolic regulator, Pianissimo, is required for chemoattractant receptor and G protein-mediated activation of the 12 transmembrane domain adenylyl cyclase in Dictyostelium. Genes Dev. 11, 3218–3231.PubMedCrossRefGoogle Scholar
  16. 16.
    Mondal, S., Bakthavatsalam, D., Steimle, P., Gassen, B., Rivero, F., Noegel, A.A. (2008) Linking Ras to myosin function: RasGEF Q, a Dictyostelium exchange factor for RasB, affects myosin II functions. J. Cell Biol. 181, 747–760.PubMedCrossRefGoogle Scholar
  17. 17.
    Zhang, S., Charest, P.G., Firtel, R.A. (2008) Spatiotemporal regulation of Ras activity provides directional sensing. Curr. Biol. 18, 1587–1593.PubMedCrossRefGoogle Scholar
  18. 18.
    Lee, S., Comer, F.I., Sasaki, A., et al. (2005) TOR complex 2 integrates cell movement during chemotaxis and signal relay in Dictyostelium. Mol. Biol. Cell 16, 4572–4583.PubMedCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Cell BiologyJohns Hopkins University, School of MedicineBaltimoreUSA

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