Spectroscopic investigations of the single tryptophan residue and of riboflavin and 7-oxolumazine bound to lumazine apoprotein from Photobacterium leiognathi.

  title={Spectroscopic investigations of the single tryptophan residue and of riboflavin and 7-oxolumazine bound to lumazine apoprotein from Photobacterium leiognathi.},
  author={Tadeusz Kulinski and Antonie J.W.G. Visser and Dennis J. O'Kane and J. Lee},
  volume={26 2},
Spectroscopic techniques have been applied to investigate the conformation, local structure, and dynamic properties of the apoprotein of the lumazine protein from Photobacterium leiognathi and the holoprotein reconstituted with either the natural ligand 6,7-dimethyl-8-ribityllumazine or the closely related analogues riboflavin and 6-methyl-7-oxo-8-ribityllumazine (7-oxolumazine). The analogues are bound similarly to the natural prosthetic group. They exhibit similar shifts on binding in their… 

Fluorescence study of the ligand stereospecificity for binding to lumazine protein.

The influence of the stereoconfiguration at the 8-position found for lumazine protein parallels that previously observed for the enzyme riboflavin synthase, where the lumazines are substrates or inhibitors.

Properties of recombinant fluorescent proteins from Photobacterium leiognathi and their interaction with luciferase intermediates.

Fluorescence emission anisotropy decay was used to establish that none of these holoproteins complexed with native luciferase and that the lumazine protein alone formed a 1:1 complex with theLuciferase hydroxyflavin fluorescent transient and the Luciferase peroxyflavin intermediates.

Time-resolved fluorescence studies of flavodoxin. Fluorescence decay and fluorescence anisotropy decay of tryptophan in Desulfovibrio flavodoxins

By comparing the results of protein preparations of normal and FMN-depleted flavodoxin, radiationless energy transfer from tryptophan to FMN has been demonstrated, and the anisotropy decay of both Desulfovibrio FMn-depicted flavodoxins is exponential, whereas that of the two holoproteins is clearly non-exponential.

Flavin dynamics in reduced flavodoxins. A time-resolved polarized fluorescence study.

Fluorescence anisotropy decays show that the flavin mononucleotide in all four reduced flavodoxins is immobilized within the protein matrix, as indicated by the recovery of a single rotational correlation time, reflecting the rotation of the whole protein.

Purification and characterization of flavoproteins and cytochromes from the yellow bioluminescence marine bacterium Vibrio fischeri strain Y1.

It is shown that an equilibrium replacement of the riboflavin can be made with excess lumazine derivative and that lumazine-bound YFP has different bioluminescence properties to those of the lumazine protein from Photobacterium leiognathi.

Time-resolved fluorescence spectroscopy of lumazine protein from Photobacterium phosphoreum using synchrotron radiation

It was found that the tryptophan residue has a large motional freedom as also reported previously for this protein and for the related protein from P. leiognathi.