title: Firefly luciferase generates two low-molecular-weight light-emitting species.
abstract: A bioluminescent D-luciferin-luciferase mixture is separated by gel filtration during the time course of the reaction. A simultaneous analysis with an UV-visible diode array detector and an on-line luminometer gives nonsuperimposable chromatograms. Luminescence recordings display three peaks, one associated with the enzyme (light-emitting species 1: LES(1)), and two other species free from the luciferase: LES(2), with a luciferyl-adenylate-like spectrum and LES(3). Production of these two species is nucleotide (ATP or 2'-dATP)- and pH-dependent. The chromatographic data presented here could lead to reconsideration of the generally assumed emission mechanism, which involves one emitter only. It could also suggest that each free emitting species is related to a colour of emission corresponding to the two defined wavelengths previously described ( approximately 575 and approximately 620 nm).
authors.affiliation: Jeune équipe 2186, Service de Pneumologie, Centre Hospitalier Lyon-Sud, Pierre Bénite Cedex, 69495, France.
authors.forename: F
authors.initials: F
authors.lastname: Brau
authors.forename: J C
authors.initials: JC
authors.lastname: Bernengo
authors.forename: K L
authors.initials: KL
authors.lastname: Min
authors.forename: J P
authors.initials: JP
authors.lastname: Steghens
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D001665:Binding Sites; D001517:Coleoptera / Q000201:enzymology*; D003838:Deoxyadenine Nucleotides / Q000378:metabolism; D049454:Firefly Luciferin / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008156:Luciferases / Q000378:metabolism*; D008163:Luminescent Measurements; D008970:Molecular Weight
chemical_list: D003838:Deoxyadenine Nucleotides; D049454:Firefly Luciferin; D000255:Adenosine Triphosphate; D008156:Luciferases; C026600:2'-deoxyadenosine triphosphate