The complete mitochondrial genome sequence of Cynoglossus abbreviatus (Pleuronectiformes: Cynoglossidae) with control region translocation and tRNA-Gln gene inversion

Abstract

Cynoglossus abbreviatus (Cynoglossidae, Soleoidei) is characterized by a bilaterally asymmetrical with both eyes on the left side. In this study, the complete mitogenome of this tongue sole has been reported for the first time. The gene order in C. abbreviatus mitogenome possesses a novel rearrangement like other tonguefish. The tRNA-Gln gene moves from the light strand to the heavy strand, accompanied by tRNA-Ile gene shuffling, leaving a large non-coding region (88 bp) between these two tRNAs. Additionally, the control region translocates to the place between ND1 and tRNA-Gln genes. The total length is 16,417 bp, with 30.9%, 29.5%, 24.9% and 14.7% for A, T, C and G, respectively (60.4% for AT content). These molecular data will provide useful information about the mechanism of gene reorganization in Cynoglossidae mitogenome and further phylogenetic study on Pleuronectiformes.

• Flatfish
• gene rearrangement
• phylogeny
• shuffling

Declaration of interest

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper. This study was supported by the National Natural Science Foundation of China (30870283, 31071890).