G Protein-coupled Chemoattractant Receptors Regulate Lyn Tyrosine Kinase·Shc Adapter Protein Signaling Complexes (∗)
Journal of Biological Chemistry, ISSN: 0021-9258, Vol: 270, Issue: 34, Page: 19969-19973
1995
- 171Citations
- 13Captures
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Metrics Details
- Citations171
- Citation Indexes171
- 171
- CrossRef139
- Captures13
- Readers13
- 13
Article Description
Receptors for chemoattractants that direct the migration of phagocytic leukocytes to sites of injury/infection also modulate many other leukocyte functions that are critical to the inflammatory response. These chemoattractant receptors, members of the G protein-coupled heptahelical receptor family, have been classically linked to cell activation via phospholipase C, calcium, and protein kinase C. We show here that activation of the N -formyl peptide chemoattractant receptor stimulates an additional protein kinase C-independent pathway through the Src-related tyrosine kinase, Lyn, in human neutrophils. We demonstrate that activation of Lyn is associated with binding to the Shc adapter protein, which becomes phosphorylated on tyrosine residues. This interaction appears to be mediated via the Shc SH2 domain. Complexes of phosphorylated Lyn and Shc with phosphatidylinositol 3-kinase are rapidly formed in stimulated neutrophils, correlating with phosphatidylinositol 1,4,5-trisphosphate formation and cell activation. This signaling pathway involving a Src-related kinase and the Shc adapter protein provides a potential mechanism linking chemoattractant receptors to downstream events involving Rac activation and NADPH oxidase. Regulation of Shc by G protein-coupled receptors may also allow these receptors to modulate the activity of the Ras/mitogen-activated protein kinase cascade.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0021925818945771; http://dx.doi.org/10.1074/jbc.270.34.19969; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0029148780&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/7650013; https://linkinghub.elsevier.com/retrieve/pii/S0021925818945771; https://dx.doi.org/10.1074/jbc.270.34.19969
Elsevier BV
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