Monitoring G protein activation in cells with BRET

Ikuo Masuho, Kirill A. Martemyanov, Nevin A. Lambert

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


Live-cell assays based on fluorescence and luminescence are now indispensable tools for the study of G protein signaling. Assays based on fluorescence and bioluminescence resonance energy transfer (FRET and BRET) have been particularly valuable for monitoring changes in second messengers, protein-protein interactions, and protein conformation. Here, we describe a BRET assay that monitors the release of free Gβγ dimers after activation of heterotrimers containing Gα subunits from all four G protein subfamilies. This assay provides useful kinetic and pharmacological information with reasonably high throughput using a standard laboratory equipment.

Original languageEnglish (US)
Pages (from-to)107-113
Number of pages7
JournalMethods in Molecular Biology
StatePublished - 2015


  • Bioluminescence resonance energy transfer (BRET)
  • G protein-coupled receptors (GPCRs)
  • Luciferase
  • Transfection
  • Venus fluorescent protein

ASJC Scopus subject areas

  • Molecular Biology
  • Genetics


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