Protein-tyrosine kinase p72(syk) in FcγRI receptor signaling

D. L. Durden, bou Liu Yen bou Liu

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

In this report we show that γ-interferon (IFN) induces the expression of the nonreceptor protein tyrosine kinase, p72(syk), and that cross-linking the FcγRI receptor in IFN-differentiated U937 cells (U937IF cells) results in the activation of syk kinase. We show that syk is tyrosine phosphorylated (12-fold increase) after FcγRI cross-linking. In vitro kinase assays demonstrate that the specific kinase activity of syk increased eightfold after FcγRI cross-linking. The activation of signal transduction through the FcγRI receptor, as measured by the respiratory burst, is associated with the tyrosine phosphorylation and catalytic activation of the syk kinase. We show that syk coprecipitates with the γ subunit of the FcγRI, FcγRIγ. The data suggest that p72(syk) is involved in signal transduction through the FcγRI receptor, involving the FcγRIγ subunit.

Original languageEnglish (US)
Pages (from-to)2102-2108
Number of pages7
JournalBlood
Volume84
Issue number7
StatePublished - Jan 1 1994

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Protein-Tyrosine Kinases
Phosphotransferases
Signal transduction
Tyrosine
Chemical activation
Signal Transduction
Interferon Receptors
Interferons
U937 Cells
Respiratory Burst
Phosphorylation
Assays
Syk Kinase
In Vitro Techniques

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

Cite this

Durden, D. L., & Yen bou Liu, B. L. (1994). Protein-tyrosine kinase p72(syk) in FcγRI receptor signaling. Blood, 84(7), 2102-2108.

Protein-tyrosine kinase p72(syk) in FcγRI receptor signaling. / Durden, D. L.; Yen bou Liu, bou Liu.

In: Blood, Vol. 84, No. 7, 01.01.1994, p. 2102-2108.

Research output: Contribution to journalArticle

Durden, DL & Yen bou Liu, BL 1994, 'Protein-tyrosine kinase p72(syk) in FcγRI receptor signaling', Blood, vol. 84, no. 7, pp. 2102-2108.
Durden DL, Yen bou Liu BL. Protein-tyrosine kinase p72(syk) in FcγRI receptor signaling. Blood. 1994 Jan 1;84(7):2102-2108.
Durden, D. L. ; Yen bou Liu, bou Liu. / Protein-tyrosine kinase p72(syk) in FcγRI receptor signaling. In: Blood. 1994 ; Vol. 84, No. 7. pp. 2102-2108.
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