Protein kinase C-δ (PKC-δ) is activated by type I interferons and mediates phosphorylation of Stat1 on serine 727

Shahab Uddin, Antonella Sassano, Dilip K. Deb, Amit K. Verma, Beata Majchrzak, Arshad Rahman, Asrar B. Malik, Eleanor N. Fish, Leonidas C. Platanias

Research output: Contribution to journalArticle

175 Citations (Scopus)

Abstract

It is well established that engagement of the Type I interferon (IFN) receptor results in activation of JAKs (Janus kinases), which in turn regulate tyrosine phosphorylation of STAT proteins. Subsequently, the IFN-dependent tyrosine-phosphorylated/activated STATs translocate to the nucleus to regulate gene transcription. In addition to tyrosine phosphorylation, phosphorylation of Stat1 on serine 727 is essential for induction of its transcriptional activity, but the IFNα-dependent serine kinase that regulates such phosphorylation remains unknown. In the present study we provide evidence that PKC-δ, a member of the protein kinase C family of proteins, is activated during engagement of the Type I IFN receptor and associates with Stat1. Such an activation of PKC-δ appears to be critical for phosphorylation of Stat1 on serine 727, as inhibition of PKC-δ activation diminishes the IFNα- or IFNβ-dependent serine phosphorylation of Stat1. In addition, treatment of cells with the PKC-δ inhibitor rottlerin or the expression of a dominant-negative PKC-δ mutant results in inhibition of IFNα- and IFNβ-dependent gene transcription via ISRE or GAS elements. Interestingly, PKC-δ inhibition also blocks activation of the p38 MAP kinase, the function of which is required for IFNα-dependent transcriptional regulation, suggesting a dual mechanism by which this kinase participates in the generation of IFNα responses. Altogether, these findings indicate that PKC-δ functions as a serine kinase for Stat1 and an upstream regulator of the p38 MAP kinase and plays an important role in the induction of Type I IFN-biological responses.

Original languageEnglish (US)
Pages (from-to)14408-14416
Number of pages9
JournalJournal of Biological Chemistry
Volume277
Issue number17
DOIs
StatePublished - Apr 26 2002
Externally publishedYes

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Interferon Type I
Phosphorylation
Serine
Protein Kinase C
Interferons
Chemical activation
Interferon alpha-beta Receptor
Tyrosine
Protein-Serine-Threonine Kinases
p38 Mitogen-Activated Protein Kinases
Transcription
Genes
Janus Kinases
Protein C Inhibitor
Protein Kinase Inhibitors
Proteins
Phosphotransferases
Cells

ASJC Scopus subject areas

  • Biochemistry

Cite this

Protein kinase C-δ (PKC-δ) is activated by type I interferons and mediates phosphorylation of Stat1 on serine 727. / Uddin, Shahab; Sassano, Antonella; Deb, Dilip K.; Verma, Amit K.; Majchrzak, Beata; Rahman, Arshad; Malik, Asrar B.; Fish, Eleanor N.; Platanias, Leonidas C.

In: Journal of Biological Chemistry, Vol. 277, No. 17, 26.04.2002, p. 14408-14416.

Research output: Contribution to journalArticle

Uddin, S, Sassano, A, Deb, DK, Verma, AK, Majchrzak, B, Rahman, A, Malik, AB, Fish, EN & Platanias, LC 2002, 'Protein kinase C-δ (PKC-δ) is activated by type I interferons and mediates phosphorylation of Stat1 on serine 727', Journal of Biological Chemistry, vol. 277, no. 17, pp. 14408-14416. https://doi.org/10.1074/jbc.M109671200
Uddin, Shahab ; Sassano, Antonella ; Deb, Dilip K. ; Verma, Amit K. ; Majchrzak, Beata ; Rahman, Arshad ; Malik, Asrar B. ; Fish, Eleanor N. ; Platanias, Leonidas C. / Protein kinase C-δ (PKC-δ) is activated by type I interferons and mediates phosphorylation of Stat1 on serine 727. In: Journal of Biological Chemistry. 2002 ; Vol. 277, No. 17. pp. 14408-14416.
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T1 - Protein kinase C-δ (PKC-δ) is activated by type I interferons and mediates phosphorylation of Stat1 on serine 727

AU - Uddin, Shahab

AU - Sassano, Antonella

AU - Deb, Dilip K.

AU - Verma, Amit K.

AU - Majchrzak, Beata

AU - Rahman, Arshad

AU - Malik, Asrar B.

AU - Fish, Eleanor N.

AU - Platanias, Leonidas C.

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