TY - JOUR
T1 - The complete mitochondrial genome sequence of Oncicola luehei (Acanthocephala
T2 - Archiacanthocephala) and its phylogenetic position within Syndermata
AU - Gazi, Mohiuddin
AU - Sultana, Tahera
AU - Min, Gi Sik
AU - Park, Yung Chul
AU - García-Varela, Martín
AU - Nadler, Steven A.
AU - Park, Joong Ki
N1 - Funding Information:
This work was supported by the Ministry of Education, Science and Technology ( 2009-0073882 ) and a grant from Marine Biotechnology Program funded by Ministry of Land, Transport and Maritime Affairs (MMRBK; Marine Mollusk Resource Bank of Korea) of Korean Government to J.-K. Park.
PY - 2012/6
Y1 - 2012/6
N2 - In the present study, we determined the complete mitochondrial genome sequence of Oncicola luehei (14,281. bp), the first archiacanthocephalan representative and the second complete sequence from the phylum Acanthocephala. The complete genome contains 36 genes including 12 protein coding genes, 22 transfer RNA (tRNA) genes and 2 ribosomal RNA genes (rrnL and rrnS) as reported for other syndermatan species. All genes are encoded on the same strand. The overall nucleotide composition of O. luehei mtDNA is 37.7% T, 29.6% G, 22.5% A, and 10.2% C. The overall A. +. T content (60.2%) is much lower, compared to other syndermatan species reported so far, due to the high frequency (18.3%) of valine encoded by GTN in its protein-coding genes. Results from phylogenetic analyses of amino acid sequences for 10 protein-coding genes from 41 representatives of major metazoan groups including O. luehei supported monophyly of the phylum Acanthocephala and of the clade Syndermata (Acanthocephala. +. Rotifera), and the paraphyly of the clade Eurotatoria (classes Bdelloidea. +. Monogononta from phylum Rotifera). Considering the position of the acanthocephalan species within Syndermata, it is inferred that obligatory parasitism characteristic of acanthocephalans was acquired after the common ancestor of acanthocephalans diverged from its sister group, Bdelloidea. Additional comparison of complete mtDNA sequences from unsampled acanthocephalan lineages, especially classes Polyacanthocephala and Eoacanthocephala, is required to test if mtDNA provides reliable information for the evolutionary relationships and pattern of life history diversification found in the syndermatan groups.
AB - In the present study, we determined the complete mitochondrial genome sequence of Oncicola luehei (14,281. bp), the first archiacanthocephalan representative and the second complete sequence from the phylum Acanthocephala. The complete genome contains 36 genes including 12 protein coding genes, 22 transfer RNA (tRNA) genes and 2 ribosomal RNA genes (rrnL and rrnS) as reported for other syndermatan species. All genes are encoded on the same strand. The overall nucleotide composition of O. luehei mtDNA is 37.7% T, 29.6% G, 22.5% A, and 10.2% C. The overall A. +. T content (60.2%) is much lower, compared to other syndermatan species reported so far, due to the high frequency (18.3%) of valine encoded by GTN in its protein-coding genes. Results from phylogenetic analyses of amino acid sequences for 10 protein-coding genes from 41 representatives of major metazoan groups including O. luehei supported monophyly of the phylum Acanthocephala and of the clade Syndermata (Acanthocephala. +. Rotifera), and the paraphyly of the clade Eurotatoria (classes Bdelloidea. +. Monogononta from phylum Rotifera). Considering the position of the acanthocephalan species within Syndermata, it is inferred that obligatory parasitism characteristic of acanthocephalans was acquired after the common ancestor of acanthocephalans diverged from its sister group, Bdelloidea. Additional comparison of complete mtDNA sequences from unsampled acanthocephalan lineages, especially classes Polyacanthocephala and Eoacanthocephala, is required to test if mtDNA provides reliable information for the evolutionary relationships and pattern of life history diversification found in the syndermatan groups.
KW - Acanthocephala
KW - Archiacanthocephala
KW - Mitochondrial genome
KW - Molecular phylogeny
KW - Oncicola luehei
KW - Syndermata
UR - http://www.scopus.com/inward/record.url?scp=84862801631&partnerID=8YFLogxK
U2 - 10.1016/j.parint.2011.12.001
DO - 10.1016/j.parint.2011.12.001
M3 - Article
C2 - 22198415
AN - SCOPUS:84862801631
VL - 61
SP - 307
EP - 316
JO - Parasitology International
JF - Parasitology International
SN - 1383-5769
IS - 2
ER -