The complete mitochondrial genome of peacock sole Pardachirus pavoninus (Pleuronectiformes: Soleidae) and comparative analysis of the control region among 13 soles

The complete mitogenome of the peacock sole Pardachirus pavoninus (LacepSde, 1802) was determined. The total length is 16536 bp, containing 13 protein-coding genes, 22 tRNA genes and two rRNA genes, as well as one control region (CR). The L-strand replication origin (O-L), which is typically located in the WANCY cluster, is lost in P. pavoninus. The gene arrangement is identical to that in most teleosts. Comparison of the CR sequences among 13 soles reveals that a 211-bp fragment at the 5'-end of the CR is lost in the P. pavoninus mitogenome, responsible for its short sequence with a length of 872 bp. All typical conservative blocks (TAS, CSB-F, E, D, C, B, A, CSB-1, 2, 3) are identified. Seven out of 13 soles contain tandem repeats in the CR and the possible mechanisms of their formation are discussed. These results may provide the consensus sequences of the conserved units in the sole CR as well as molecular data for phylogenetic studies on Soleidae and Pleuronectiformes.