Interaction of bacterial luciferase with 8-substituted flavin mononucleotide derivatives.

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Interaction of bacterial luciferase with 8-substituted flavin mononucleotide derivatives.

Bacterial luciferase catalyzes the emission of visible light from the reaction of reduced flavin, molecular oxygen, and an n-alkyl aldehyde. The mechanism of the reaction was probed by measuring the electronic effects of various substituents at the 8-position of the flavin ring system. Substituent effects were obtained for CH3-, Cl-, CH3O-, CH3S-, F-, and H- on the rate of formation and decay o...

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The blue neutral luciferase flavin radical has been shown not to be in a catalytically significant equilibrium with species leading to emission of light [Kurfürst, M., Ghisla, S., Presswood, R., & Hastings, J. W. (1982) Eur. J. Biochem. 123, 355-361]. It is shown here that this radical can nevertheless react with O2-. to form a species that is competent in light emission. From its properties, t...

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Isolation and characterization of the transient, luciferase-bound flavin-4a-hydroxide in the bacterial luciferase reaction

Procedures and conditions have been established such that the unstable enzyme-bound flavin intermediate produced in the bacterial luciferase reacti~ can be isolated as approximately 70% of the flavin product, the remaining being the final product, FMN. The structure of the intermediate is proposed to be that of a luciferase-bound 4a,5-dihydroflavin-4a-hydroxide. The intermediate has a half-life...

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Interaction of bacterial luciferase with aldehyde substrates and inhibitors.

Bacterial luciferase catalyzes the reaction of FMNH2, O2, and an aliphatic aldehyde to yield the carboxylic acid, FMN, water and blue-green light. The kinetics of the bacterial luciferase reaction were measured by stopped-flow spectrophotometry at pH 7 and 25 degrees C for the series of aldehydes from n-heptanal to n-undecanal. The rate of formation of the 4a-hydroperoxyflavin intermediate was ...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1997

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(18)40783-1