Complete mitochondrial genome of the hardnose shark Carcharhinus macloti (Carcharhiniformes: Carcharhinidae).

The complete mitochondrial genome ofCarcharhinus maclotiwas determined in this study. It is 16,701 bp in length and contains 37 genes with the typical gene order and transcriptional orientation in vertebrates. A total of 29 bp overlaps and 29 bp short intergenic spaces located in 22 gene junctions. The overall base composition is 31.6% A, 26.2% C, 13.0% G and 29.2% T. Two start codons (ATG and GTG) and three stop codons (AGG, TAG and TAA/T) were found in 13 protein-coding genes. The length of 22 tRNA genes ranged from 66 bp (tRNA-Ser2) to 75 bp (tRNA-Leu1). The tRNA-Ser2(GCU) lacks the dihydrouridine arm by a simple loop and can not be folded into the typical cloverleaf structure. The control region is 1066 bp in length with high A+T content (68.2%). [ABSTRACT FROM AUTHOR]