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Protein tyrosine kinase-mediated pathways in G protein-coupled receptor signaling

I Dikic1, A Blaukat

  • 1Ludwig Institute for Cancer Research, Uppsala, Sweden.

Cell Biochemistry and Biophysics
|July 14, 1999
PubMed

Insights

Protein tyrosine kinases (PTKs) transmit signals from G protein-coupled receptors (GPCRs) to control cell functions. This review explores PTK involvement in GPCR signaling pathways, including Ras/MAP kinase and JNK/SAPK pathways.

Area of Science:

  • Cellular Biology
  • Molecular Signaling
  • Biochemistry

Background:

  • Protein tyrosine kinases (PTKs) are crucial mediators of intracellular signaling pathways.
  • G protein-coupled receptors (GPCRs) initiate diverse cellular responses, including proliferation, migration, and adhesion.
  • The precise molecular mechanisms linking PTKs and GPCRs remain incompletely understood.

Purpose of the Study:

  • To review the role of PTKs in GPCR signaling.
  • To elucidate the molecular mechanisms underlying PTK-mediated GPCR effects.
  • To discuss novel insights into chemokine receptor-activated PTKs.

Main Methods:

  • Literature review of existing research on PTKs and GPCRs.
  • Analysis of signaling pathways involving PTKs, such as Ras/MAP kinase and JNK/SAPK.
  • Discussion of emerging findings on chemokine receptor signaling.

Main Results:

  • PTKs regulate key cellular processes like proliferation, migration, and adhesion downstream of GPCRs.
  • A unifying theme suggests both growth factors and GPCRs employ PTK activity and the Ras/MAP kinase pathway for mitogenic signaling.
  • PTKs are implicated in GPCR signal transmission to the JNK/SAPK kinase pathway.

Conclusions:

  • PTKs play a significant role in mediating diverse cellular functions regulated by GPCRs.
  • Understanding PTK involvement in GPCR signaling provides insights into cell growth and transformation.
  • Emerging research highlights the importance of chemokine receptor-activated PTKs in cellular processes.

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