Ultrafast fluorescence quenching dynamics of flavin chromophores in protein nanospace
Article Abstract:
The femtosecond fluorescence up-conversion method was utilized to analyze excited-state dynamics of 'nonfluorescent' flavoproteins. Owing to their X-ray structures, the ultrafast fluorescence quenching mechanisms of these flavoproteins were attributed to ultrafast electron transfer or electron transfer with subsequent proton-transfer interactions between excited flavin chromophore and nearby tryptophan and tyrosin residues in the protein nanospace. The existence of extremely fast Franck-Condon -> fluorescent state relaxations specific to the protein environments was inferred from comparisons of fluorescence time profiles and spectral characteristics of flavin chromophores in solutions with those in protein environments.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1998
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Comparison between ultrafast fluorescence dynamics of FMN binding protein from Desulfovibrio vulgaris, strain Miyazaki, in solution vs crystal phases
Article Abstract:
The comparison between the ultrafast fluorescence dynamics of FMN binding protein (FBP) from desulfobivro vulgaris and strain Miyaxaki F in solution and crystal phases revealed that the longer lifetime in crystal could be due to the absence of water molecules around FBP with rapid motional freedom and it might be the driving force for the ET in flavoproteins.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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Donor-Acceptor Distance-dependence of photoinduced electron-transfer rate in flavoproteins
Article Abstract:
The fluorescence lifetimes of flavodoxin from M.elsdenii are calculated using fluorescence up-conversion method. The photoinduced electron transfer in flavoproteins is influenced by the average distance between the donor and acceptor.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2007
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