JBC, Vol. 250, Issue 18, 7288-7293, Sep, 1975
The oxygenated bacterial luciferase-flavin intermediate. Reaction products via the light and dark pathways
J. W. Hastings and C. Balny
The identity and stoichiometry of the reaction products of the oxygenated
reduced flavin bacterial luciferase intermediate isolated by Sephadex
chromatography at low temperature have been determined under two
conditions, allowing the reaction to go to completion by warming either in
the presence or absence of long chain aliphatic aldehyde. In the latter
case, very little bioluminescence occurs, and 1 mol each of H2O2 and FMN is
produced per mol of enzyme intermediate. In the presence of aldehyde, the
formation of an aldehyde-enzyme intermediate complex can be detected by
optical absorption spectroscopy at -30 degrees; upon warming,
bioluminescence with high quantum yield occurs with the formation of 1 mol
of FMN but no H2O2.