Construction of streptavidin-luciferase fusion protein for ATP sensing with fixed form

A fusion protein consisting of streptavidin and firefly luciferase was constructed to establish an accurate measuring technique of local ATP concentration. The fusion protein retained the binding ability of streptavidin and enzymatic activity of luciferase. Also, it could detect the concentration of antigens and could determine nanomolar concentrations of ATP in its fixed form via interactions with biotin-conjugated antibodies.