Complete mitochondrial genome of the Indonesian whaler shark Carcharhinus tjutjot.

In this study, we first present the complete mitochondrial genome of the Indonesian whaler shark Carcharhinus tjutjot. It is 16,705 bp in length and encodes 37 mitochondrial genes with the typical gene order and transcriptional direction in vertebrates. The overall nucleotide base content is 31.6% A, 26.4% C, 13.0% G and 29.0% T. A total of 33 bp short overlaps and 22 bp short intergenic spaces were found at 9 and 11 gene junctions, respectively. Two initiated codon types (ATG and GTG) and three terminal codon types (TAA, TAG and AGG) were used in the protein-coding genes. The tRNA-Ser2 replaced the DHU arm by a simple loop and could not be folded into the typical secondary structure. The origin of L-strand replication (OL) was identified between the tRNA-Asn and tRNA-Cys genes. The termination-associated sequence (TAS) was found near the tRNA-Pro in the control region.