Particle-based phasor-FLIM-FRET resolves protein-protein interactions inside single viral particles.

ABSTRACT: Fluorescence lifetime imaging microscopy (FLIM) is a popular modality to create additional contrast in fluorescence images. By carefully analyzing pixel-based nanosecond lifetime patterns, FLIM allows studying complex molecular populations. At the single-molecule or single-particle level, however, image series often suffer from low signal intensities per pixel, rendering it difficult to quantitatively disentangle different lifetime species, such as during Förster resonance energy transfer (FRET) analysis in the presence of a significant donor-only fraction. In this article we investigate whether an object localization strategy and the phasor approach to FLIM have beneficial effects when carrying out FRET analyses of single particles. Using simulations, we first showed that an average of ∼3

SUBMITTER: Coucke Q 

PROVIDER: S-EPMC10463199 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature