名古屋大学 · 生化学・遺伝学・分子生物学
本研究室では、海洋生物に広く見られる発光現象の分子メカニズムと生態的意義を、主に深海生物を対象に解明しています。特に、発光に必要な物質や酵素を食物から獲得する「発光物質の栄養的獲得」や、発光の進化・多様化のメカニズムに注目しています。また、土壌に生息する発光性節足動物など、非海洋の発光生物の研究も進めています。
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Through their diet, animals can obtain substances essential for imparting special characteristics, such as toxins in monarch butterflies and luminescent substances in jellyfishes. These substances are typically small molecules because they are less likely to be digested and may be hard for the consumer to biosynthesize. Here, we report that <i>Parapriacanthus ransonneti</i>, a bioluminescent fish, obtains not only its luciferin but also its luciferase enzyme from bioluminescent ostracod prey. Th
Abstract Bioluminescence, light produced by living organisms, is a common trait in the ocean. In benthic ecosystems in the deep-sea, octocorals are some of the most abundant luminous animals. Among luminous sessile organisms, the shallow-water sea pansy Renilla has been well studied for its chemistry and molecular biology. Aside from Renilla , however, little is known about the bioluminescent mechanisms of other anthozoans, especially deep-sea corals. In this study, we investigated the character
Coelenterazine is a key substrate involved in marine bioluminescence which is used for light-production by at least nine phyla. Some luminous animals, such as the hydromedusa <i>Aequorea</i>, lack the ability to produce coelenterazine endogenously and instead depend on dietary sources. Little is known about the source organisms or the metabolic process of coelenterazine biosynthesis. Here, we present evidence that ctenophores are both producers and suppliers of coelenterazine in marine ecosystem
Nocturnal Japanese fireflies, Luciola parvula, emit from their lanterns a yellow light, one of the most red-shifted colors found among fireflies. Previously, we isolated and characterized two different types of luciferase gene, Luc1 and Luc2, from the fireflies Luciola cruciata and Luciola lateralis; Luc1 is responsible for the green-yellow luminescence of larval and adult lanterns, whereas Luc2 is responsible for the dim greenish glow of eggs and pupal bodies. The biological role of firefly lan
The phylum Annelida encompasses a diverse group of animals, with bioluminescent species documented in 14 families. Despite this diversity and the scattered distribution of bioluminescent lineages, little is known about the molecular biology, chemistry, morphology, ecology, and evolution of bioluminescence in annelids. During a deep-sea exploration off Minamidaito Island in the western Pacific Ocean, we discovered that Aricidea sp. emits green light when stimulated. The specimens were identified
Bioluminescence plays important roles among animals in both intra- and inter-species communication. A variety of bioluminescent organisms inhabit soil environments, even in areas where light penetration is minimal. However, due to the lack of a model system to study underground bioluminescence, the biology and molecular mechanisms underlying this phenomenon remain largely unknown. Springtails (Collembola) are representative soil animals, and we recently identified Lobella sauteri (Neanuridae) as
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