Calcium signalling and gene expression

Goedele Van Haasteren, Senlin Li, Marco Muda, Stefan Susini, Werner Schlegel

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

A wide variety of compounds as extracellular signals cause changes in the free cytosolic Ca2+ concentration. These factors include hormones, growth factors, neurotransmitters, but also nutrient and metabolic activators. Ca2+ signaling is caused by mobilization of Ca2+ from internal stores and by well controlled and by well controlled and timed Ca2+ influx from the extracellular space. Ca2+ signals address Ca2+ dependent enzymes, most importantly Ca2+ sensitive protein kinases and phosphatases. The profound influence of Ca2+ signaling on gene expression has been recognized a long time ago. As Ca2+ signals are short-lived when compared to alterations in differentiated gene expression, it is generally considered that genes coding for short-lived transcription factors (i.e. fos, jun) are the immediate target of Ca2+ signalling. Transcription of these immediate early genes (IEG) can be activated without the need for protein synthesis. Ca2+ signalling affects differentiated gene expression via changes in the absolute and relative abundance of IEG products, which in turn control the expression of differentiated genes. Ca2+ signals can stimulate both transcriptional initiation as well as transcriptional elongation. Initiation of transcription is stimulated by the Ca2+ dependent phosphorylation of binding proteins addressing two response elements in the promoter of IEGs: the cAMP response element, CRE, and the serum response element, SRE. Distinct protein kinases are involved in either case. We study the elongation of transcripts of the IEG c-fos beyond the first intron which is favoured by Ca2+ signals, involving mechanisms which still are poorly understood. We can show that intron sequences contribute to the control of elongation by Ca2+, and that there is a strong interrelation between the transcription control by the promoter and by the intron.

Original languageEnglish (US)
Pages (from-to)481-492
Number of pages12
JournalJournal of Receptor and Signal Transduction Research
Volume19
Issue number1-4
StatePublished - Jan 1 1999

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ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Cite this

Van Haasteren, G., Li, S., Muda, M., Susini, S., & Schlegel, W. (1999). Calcium signalling and gene expression. Journal of Receptor and Signal Transduction Research, 19(1-4), 481-492.