Comparison of FRET microscopy imaging techniques for studying protein-protein interactions in living cells using FRET standards

Details Comparison of FRET microscopy imaging techniques for studying protein-protein interactions in living cells using FRET standards Comparison of FRET microscopy imaging techniques for studying protein-protein interactions in living cells using FRET standards

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7569e..16s&link_type=abstract

Multiphoton Microscopy in the Biomedical Sciences X. Edited by Periasamy, Ammasi; So, Peter T. C.; König, Karsten. Proceedings

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Fórster resonance energy transfer (FRET) microscopy is a powerful tool to localize protein-protein interactions in living specimens. Various FRET microscopy imaging techniques have been established and are generally categorized into intensity-based and lifetime-based methods. Based on the detection of the acceptor sensitized emission, we have developed the FRET imaging methodologies that can be applied in combination of wide-field, conventional confocal or spectral microscopy. All these FRET microscopy methods have the capability to interpret the change in proximity between the donor and the acceptor through measuring the apparent energy transfer efficiency (E). However, to answer what subtle change of E can be detected and to link correctly FRET data to biological information, the imaging techniques have to be well calibrated. In this regard, we compare various FRET microscopy methods and assess their utilities using several genetic ("FRET standard") constructs where Cerulean and Venus fluorescent proteins are tethered by different amino acid linkers.

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