Detecting cAMP-induced Epac activation by fluorescence resonance energy transfer: Epac as a novel cAMP indicator.

Journal article

Epac1 is a guanine nucleotide exchange factor for Rap1 that is activated by direct binding of cAMP. In vitro studies suggest that cAMP relieves the interaction between the regulatory and catalytic domains of Epac. Here, we monitor Epac1 activation in vivo by using a CFP-Epac-YFP fusion construct. When expressed in mammalian cells, CFP-Epac-YFP shows significant fluorescence resonance energy transfer (FRET). FRET rapidly decreases in response to the cAMP-raising agents, whereas it fully recove...

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Authors: Ponsioen, B; Zhao, J; Riedl, J; Zwartkruis, F; van der Krogt, G

• Publication status: Published
• Journal: EMBO reports
• Volume: 5
• Issue: 12
• Pages: 1176-1180
• Publication date: 2004-12-01
• DOI: 10.1038/sj.embor.7400290
• EISSN: 1469-3178
• ISSN: 1469-221X
• Language: English
• Keywords: Biological Markers; Cyclic AMP-Dependent Protein Kinases; Humans; Biosensing Techniques; Fluorescence Resonance Energy Transfer; Genes, Reporter; Protein Conformation; Animals; Guanine Nucleotide Exchange Factors; Cyclic AMP