The complete mitochondrial genome of Arctic Calanus hyperboreus (Copepoda, Calanoida) reveals characteristic patterns in calanoid mitochondrial genome

Copepoda is the most diverse and abundant group of crustaceans, but its phylogenetic relationships are ambiguous. Mitochondrial (mt) genomes are useful for studying evolutionary history, but only six complete Copepoda mt genomes have been made available and these have extremely rearranged genome str...

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Bibliographic Details
Published in:Gene 2013-05, Vol.520 (1), p.64-72
Main Authors: Kim, Sanghee, Lim, Byung-Jin, Min, Gi-Sik, Choi, Han-Gu
Format: Article
Language:English
Subjects:
Animals
Arctic
Base Sequence
Calanoida
Calanus
Calanus hyperboreus
Copepoda
Copepoda - genetics
Evolution, Molecular
genes
Genes, Insect
Genome
Genome, Mitochondrial
Mitochondria
Molecular Sequence Data
Multigene Family
Open Reading Frames
Phylogeny
ribosomal RNA
RNA, Ribosomal - genetics
RNA, Transfer - genetics
transfer RNA
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Summary:Copepoda is the most diverse and abundant group of crustaceans, but its phylogenetic relationships are ambiguous. Mitochondrial (mt) genomes are useful for studying evolutionary history, but only six complete Copepoda mt genomes have been made available and these have extremely rearranged genome structures. This study determined the mt genome of Calanus hyperboreus, making it the first reported Arctic copepod mt genome and the first complete mt genome of a calanoid copepod. The mt genome of C. hyperboreus is 17,910bp in length and it contains the entire set of 37 mt genes, including 13 protein-coding genes, 2 rRNAs, and 22 tRNAs. It has a very unusual gene structure, including the longest control region reported for a crustacean, a large tRNA gene cluster, and reversed GC skews in 11 out of 13 protein-coding genes (84.6%). Despite the unusual features, comparing this genome to published copepod genomes revealed retained pan-crustacean features, as well as a conserved calanoid-specific pattern. Our data provide a foundation for exploring the calanoid pattern and the mechanisms of mt gene rearrangement in the evolutionary history of the copepod mt genome. ► The mitochondria genome of Arctic Calanus hyperboreus is determined in this study. ► It is the first complete mt genome of a calanoid copepod. ► The longest crustacean control region and a large tRNA cluster were found. ► It contains both pan-crustacean features and a conserved calanoid-specific pattern.
ISSN:0378-1119
1879-0038
DOI:10.1016/j.gene.2012.09.059