24 June 1988 The Application Of Picosecond-Resolved Fluorescence Spectroscopy In The Study Of Flavins And Flavoproteins
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Proceedings Volume 0909, Time-Resolved Laser Spectroscopy in Biochemistry; (1988) https://doi.org/10.1117/12.945369
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States
Abstract
Picosecond relaxation processes of flavins and flavoproteins were investigated with mode-locked and synchronously pumped lasers as source of excitation and time-correlated single photon counting in detection. Free flavin rotational correlation times of 80-150 ps (values depending on the flavin derivative used) could be precisely determined. Picosecond-resolved fluorescence of the flavin bound in the electron-carrier protein flavodoxin from Desulfovibrio vulgaris yields a fluorescence lifetime component of 30 ps in the fluorescence decay. Time-resolved tryptophan fluorescence in flavodoxin exhibits a short lifetime component, which is attributed in part to energy transfer from tryptophan to flavin. Three-dimensional fluorescence spectroscopy and fluorescence anisotropy decay analysis of the two tryptophan residues in flavodoxin provide new evidence for specific flavin-tryptophan interaction. Finally, picosecond-resolved spectroscopy enables the direct measurement of energy transfer between two different chromophores in a protein, from which topographical details can be inferred.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Antonie J.W.G Visser, Arie van Hoek, "The Application Of Picosecond-Resolved Fluorescence Spectroscopy In The Study Of Flavins And Flavoproteins", Proc. SPIE 0909, Time-Resolved Laser Spectroscopy in Biochemistry, (24 June 1988); doi: 10.1117/12.945369; https://doi.org/10.1117/12.945369
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