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Mol Cell Biol. 2006 Jul;26(14):5497-508.

Ca2+/calmodulin-dependent protein kinase II is a modulator of CARMA1-mediated NF-kappaB activation.

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  • 1Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA 02114, USA.

Abstract

CARMA1 is a central regulator of NF-kappaB activation in lymphocytes. CARMA1 and Bcl10 functionally interact and control NF-kappaB signaling downstream of the T-cell receptor (TCR). Computational analysis of expression neighborhoods of CARMA1-Bcl10MALT 1 for enrichment in kinases identified calmodulin-dependent protein kinase II (CaMKII) as an important component of this pathway. Here we report that Ca(2+)/CaMKII is redistributed to the immune synapse following T-cell activation and that CaMKII is critical for NF-kappaB activation induced by TCR stimulation. Furthermore, CaMKII enhances CARMA1-induced NF-kappaB activation. Moreover, we have shown that CaMKII phosphorylates CARMA1 on Ser109 and that the phosphorylation facilitates the interaction between CARMA1 and Bcl10. These results provide a novel function for CaMKII in TCR signaling and CARMA1-induced NF-kappaB activation.

PMID:
16809782
[PubMed - indexed for MEDLINE]
PMCID:
PMC1592706
Free PMC Article

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