Abstract
INTRODUCTION In the firefly, light emission is produced by the reaction of D-luciferin, 0 2 and firefly luciferase [EC 1.13.12.71 in the presence of ATP and Mg2L. Previously, we found that firefly luciferase has catalytic activity of long-chain fatty acyl-CoA synthetase [EC 6.2.1.31.' We also found that a homologous gene of firefly luciferase in Drosophila melanogaster, CG6178, is a long-chain fatty acyl-CoA synthetase but not l~ciferase.~,~ Recently, we cloned and characterized paralogous genes of firefly luciferase in the Japanese firefly Luciola cruciata4 and orthologous genes of firefly luciferase in non-luminous beetle Tenebrio molitor.' In this study, we describe an evolutionary process of firefly luciferase based on our recent results.
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