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  • Title: Complete mitochondrial genome of the rabbitfish Siganus fuscescens (Perciformes, Siganidae).
    Author: Oh DJ, Kim JY, Lee JA, Yoon WJ, Park SY, Jung YH.
    Journal: DNA Seq; 2007 Aug; 18(4):295-301. PubMed ID: 17541835.
    Abstract:
    We determined the complete nucleotide sequence of the mitochondrial genome for the rabbitfish Siganus fuscescens (Perciformes, Siganidae). This mitochondrial genome, consisting of 16,491 base pairs (bp), included 13 protein-coding genes, 2 ribosomal RNAs, 22 transfer RNAs, and a noncoding control region similar those found in other vertebrates; the gene order was identical to that of typical vertebrates. Most of the genes of S. fuscescens were encoded on the H-strand, while the ND6 and eight tRNA (Gln, Ala, Asn, Cys, Tyr, Ser [UCN], Glu, and Pro) genes were encoded on the L-strand. The reading frames of ATPase 8 and 6 and those of ND4L and ND4 overlapped by ten and seven nucleotides, respectively. All mitochondrial protein-coding genes began with an ATG start codon, except for CO1, which started with GTG. Open reading frames of S. fuscescens ended with TAA (ND1, CO1, ATPase 8, ND4L, ND5 and ND6), and the remainder had incomplete stop codons, either TA (ATPase 6 and CO3) or T (ND2, CO2, ND3, ND4, and Cytb). The origin of L-strand replication in S. fuscescens was located in a cluster of five tRNA genes (WANCY) and was 34 nucleotides in length. A major noncoding region between the tRNA-Pro and tRNA-Phe genes (828 bp) was considered to be the control region (D-loop). Within this sequence, we identified a conserved sequence block characteristic of this region. The rabbitfish was grouped with Siganus canaliculatus in most parsimony analyses, which showed 100% bootstrap support for their divergence. These findings are useful for inferring phylogenetic relationships and identification within the suborder Acanthuroidei.
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