Cloning and characterization of the homologous genes of firefly luciferase in the mealworm beetle, Tenebrio molitor

Three homologous genes of firefly luciferase were cloned from the non-luminous beetle Tenebrio molitor . Three gene products for homologues, TmLL-1, TmLL-2 and TmLL-3, showed fatty acyl-coenzyme A (acyl-CoA) synthetic activity, but not luciferase activity with firefly luciferin. The transcripts were detected through the developmental stages in T. molitor . These results suggested that firefly luciferase was evolved from a fatty acyl-coenzyme A synthetase by gene duplications in the insect.