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Communication between the cell surface and the nucleus is essential for regulated gene expression. In neurons, Ca(2+)-dependent gene transcription is sensitive to local Ca(2+) entry. In immune cells, excitation-transcription coupling is thought to involve global Ca(2+) signals. Here, we show that in mast cells, Ca(2+) microdomains from store-operated Ca(2+) release-activated Ca(2+) channels activate expression of the transcription factor c-fos. Local Ca(2+) entry is sensed by the tyrosine kinase Syk, which signals to the nucleus through the transcription factor STAT5. Ca(2+) microdomains also promote secretion of proinflammatory messengers, which, like gene expression, requires Syk. Syk therefore couples Ca(2+) microdomains to the activation of two spatially and temporally distinct cellular responses, revealing the versatility of local Ca(2+) signals in driving cell activation.

Original publication




Journal article


J Biol Chem

Publication Date





24767 - 24772


Animals, Calcium, Calcium Signaling, Cell Line, Tumor, Cell Nucleus, Cytoplasm, Extracellular Signal-Regulated MAP Kinases, Intracellular Signaling Peptides and Proteins, Models, Biological, Patch-Clamp Techniques, Protein Structure, Tertiary, Protein-Tyrosine Kinases, Rats, Reverse Transcriptase Polymerase Chain Reaction, Syk Kinase, Time Factors, Transcription, Genetic