title: The complete mitochondrial genome of Pseudochauhanea macrorchis (Monogenea: Chauhaneidae) revealed a highly repetitive region and a gene rearrangement hot spot in Polyopisthocotylea.
abstract: The complete mitochondrial genome of Pseudochauhanea macrorchis was determined and compared with other monogenean mitochondrial genomes from GenBank. The circular genome was 15,031 bp in length and encoded 36 genes (12 protein-coding genes, two ribosomal RNAs, and 22 transfer RNAs) typically found in flatworms. Structures of the mitochondrial genome were mostly concordant with that known for Microcotyle sebastis and Polylabris halichoeres, but also contained two noted features-a gene rearrangement hot spot and the highly repetitive region (HRR) in major non-coding region (NCR). The gene rearrangement hot spot located between the cox3 and nad5 genes, including a cluster of tRNA genes, nad6 gene and one major NCR. The HRR seemed to be a unique feature of the polyopisthocotylean mitochondrial genomes. In conclusion, the present study provided new molecular data for future studies of the comparative mitochondrial genomics and also served as a resource of markers for the studies of species populations and monogenean phylogenetics.
authors.affiliation: Key Laboratory for Aquatic Products Safety of Ministry of Education/State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 135 Xingang West Road, Haizhu District, Guangzhou 510275, China.
authors.forename: Juan
authors.initials: J
authors.lastname: Zhang
authors.forename: Xiangyun
authors.initials: X
authors.lastname: Wu
authors.forename: Mingquan
authors.initials: M
authors.lastname: Xie
authors.forename: Anxing
authors.initials: A
authors.lastname: Li
mesh_terms: D000818:Animals; D001482:Base Composition; D001483:Base Sequence; D003062:Codon; D015321:Gene Rearrangement; D054629:Genome, Mitochondrial; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010986:Platyhelminths / Q000235:genetics*; D012335:RNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D012343:RNA, Transfer / Q000737:chemistry / Q000235:genetics; D012091:Repetitive Sequences, Nucleic Acid; D016415:Sequence Alignment
chemical_list: D003062:Codon; D012335:RNA, Ribosomal; D012343:RNA, Transfer