Use a bright luciferase for bioluminescence resonance energy transfer to explore protein:protein interactions

Highly sensitive NanoBRET measurements using the LVF monochromator or filter-based readers

With the NanoLuc® luciferase, Promega has created the next generation of BRET assays. The NanoLuc® enzyme is smaller in size than other luciferases. At the same time its emission is brighter by several factors. These properties make the NanoLuc® the perfect BRET donor. As BRET acceptor, a fluorescently labeled fusion protein is used such as the HaloTag® that emits light in the red range (>610 nm).


The NanoBRET assay technology is intended for studying protein-protein interactions in living cells. The proteins of major interest are membrane receptors such as G-protein coupled receptors (GPCR) and receptor tyrosine kinases (RTK).


All BMG LABTECH microplate readers can be equipped with optimized filters to record the two BRET signals coming from NanoLuc® luciferase and fluorophore.


The CLARIOstar and the VANTAstar™ with their linear variable filter (LVF) monochromator™ match the two NanoBRET wavelengths without special filters. The flexibility to use the LVF monochromator for NanoBRET™ measurements enables discrimination of donor luminescence and two different acceptor fluorophores. This features a novel receptor internalization assay.

The boxes below lead on to NanoBRET related products.

The boxes below lead on to NanoBRET related application notes and further materials.