Control of signaling in a MAP-kinase pathway by an RNA-binding protein.
Control of signaling in a MAP-kinase pathway by an RNA-binding protein.
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DOI:
10.1371/journal.pone.0000249
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发表时间:
2007-02-28
期刊:
影响因子:
3.7
通讯作者:
Galitski T
中科院分区:
文献类型:
--
作者:
Prinz S;Aldridge C;Ramsey SA;Taylor RJ;Galitski T
Signaling-protein mRNAs tend to have long untranslated regions (UTRs) containing binding sites for RNA-binding proteins regulating gene expression. Here we show that a PUF-family RNA-binding protein, Mpt5, represses the yeast MAP-kinase pathway controlling differentiation to the filamentous form. Mpt5 represses the protein levels of two pathway components, the Ste7 MAP-kinase kinase and the Tec1 transcriptional activator, and negatively regulates the kinase activity of the Kss1 MAP kinase. Moreover, Mpt5 specifically inhibits the output of the pathway in the absence of stimuli, and thereby prevents inappropriate cell differentiation. The results provide an example of what may be a genome-scale level of regulation at the interface of signaling networks and protein-RNA binding networks.
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