Complete mitochondrial genome of the Antarctic copepod Tigriopus kingsejongenesis (Harpacticoida, Harpacticidae)

Abstract

The complete mitochondrial genome was sequenced from the Antarctic harpacticoid copepod Tigriopus kingsejongensis. The sequenced genome size was 14,940 bp, possessing different gene order and contents to those of the congeneric species T. japonicus and T. californicus in the genus Tigriopus. The mitochondrial genome of T. kingsejongensis has 13 protein-coding genes (PCGs), 2 rRNAs, and 22 tRNAs. Of the 13 PCGs, CO1, ND3, ATP6, and CO3 genes had incomplete stop codons T–, T–, TA–, and T–, respectively. Furthermore, the stop codons of the remaining 11 PCGs were TAA or TAG, while the start codon of 13 PCGs was ATG (CO1, ND4, Cytb, ND2, ND1, CO2, ND6, ATP6, CO3 genes), ATT (ND5, ATP8 genes), and ATA (ND3, ND4L genes), respectively. The nucleotide of 13 PCGs of T. kingsejongensis mitogenome showed 53.42, 52.17, and 49.10% similarities to the copepods T. japonicus, T. californicus, and Amphiascoides atopus, respectively, while the amino acid similarities were 64.38, 63.86, and 62.40%, respectively.