Functional hierarchy of AUUUA motifs in mediating rapid interleukin-3 mRNA decay

Stoecklin, G. and Hahn, S. and Moroni, C.. (1994) Functional hierarchy of AUUUA motifs in mediating rapid interleukin-3 mRNA decay. Journal of biological chemistry, Vol. 269 , no. 46. pp. 28591-28597.

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Official URL: http://edoc.unibas.ch/dok/A5257899

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In mast cells, expression of interleukin-3 (IL-3) is induced following IgE-receptor activation via calcium-dependent mRNA stabilization. We performed a mutational analysis of the 8 AUUUA motifs located in the 3'-untranslated region of IL-3 mRNA, and analyzed the effect on mRNA stability in PB-3c mast cells. Similar to endogenous IL-3 mRNA, exogenous IL-3 transcripts had a short half-life and were stabilized following stimulation of calcium influx by ionomycin. Specific mutation of 3 AUUUA motifs had almost the same stabilizing effect as deletion of the entire AU-rich region. Mutating even a single critical motif led to a weak, but significant mRNA stabilization. Ionomycin treatment did not further enhance the expression of mutationally stabilized transcripts. Our data fit a model, where within a cluster of 6 AUUUA motifs, 3 adjacent motifs are required for binding of a factor which mediates rapid IL-3 mRNA decay. Activity of such a factor might be under control of a calcium-dependent pathway.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Growth and Development (Moroni)
03 Faculty of Medicine > Departement Biomedizin > Former Units at DBM > Growth and Development (Moroni)
UniBasel Contributors:Moroni, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Society of Biological Chemists
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:20
Deposited On:22 Mar 2012 13:19

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