Evolution of bioluminescence in marine planktonic copepods

Yasuhiro Takenaka*, Atsushi Yamaguchi, Naoki Tsuruoka, Masaki Torimura, Takashi Gojobori, Yasushi Shigeri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Copepods are the dominant taxa in zooplankton communities of the ocean worldwide. Although bioluminescence of certain copepods has been known for more than a 100 years, there is very limited information about the structure and evolutionary history of copepod luciferase genes. Here, we report the cDNA sequences of 11 copepod luciferases isolated from the superfamily Augaptiloidea in the order Calanoida. Highly conserved amino acid residues in two similar repeat sequences were confirmed by the multiple alignment of all known copepod luciferases. Copepod luciferases were classified into two groups of Metridinidae and Heterorhabdidae/Lucicutiidae families based on phylogenetic analyses, with confirmation of the interrelationships within the Calanoida using 18S ribosomal DNA sequences. The large diversity in the specific activity of planktonic homogenates and copepod luciferases that we were able to express in mammalian cultured cells illustrates the importance of bioluminescence as a protective function against predators. We also discuss the relationship between the evolution of copepod bioluminescence and the aspects of their ecological characteristics, such as swimming activity and vertical habitat.

Original languageEnglish (US)
Pages (from-to)1669-1681
Number of pages13
JournalMolecular biology and evolution
Volume29
Issue number6
DOIs
StatePublished - Jun 1 2012

Keywords

  • Copepoda
  • Crustacean
  • Luciferase
  • Phylogenetic analysis
  • Zooplankton

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

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