期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 149, 期 -, 页码 1232-1240出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.02.017
关键词
Tongue sole; Mitogenome; Gene inversion; Tandem duplication/random loss
资金
- National Natural Science Foundation of China [41706176, 31471979]
- Open Fund of the CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences [2018011001]
- Basic Scientific Research Operating Expenses of Zhejiang Provincial Universities [2019J00022]
- Introduction of Talent of Zhejiang Ocean University
Mitochondrial genome (mitogenome) structure and gene order are generally considered conserved in vertebrates. However, the flattish (Pleuronectiformes) mitogenomes exhibit the most diversified gene rearrangement patterns. Here, we report a newly sequenced mitogenome of Cynoglossus melampetalus (Pleuronectiformes: Cynoglossidae). The total length of the C. melampetalus mitogenome is 16,651 bp, containing 13 protein-coding genes, two ribosomal RNAs, 22 transfer RNAs, a putative control region, and an 1-strand replication origin. Like all previously reported tongue sole (Cynoglossinae) mitogenomes, the C melampetalus tRNA-Gln gene is inverted from the light to the heavy strand (Q inversion), accompanied by the translocation of CR, which is downstream to the 3'-end of ND1. In addition, we observed a unique tRNA-Ile-Met-Glu (IMQ) gene order that differed from the &NA-au-Ile-Met (QIM) order previously reported for other 14 Cynoglossinae mitogenomes. To our knowledge, it is the first report of two different patterns of mitogenomic gene-arrangement within the same genus in teleost. According to the Q inversion, Met pseudogene (psi Met) and long intergenic gap (186 bp) between M and Q genes, the observed gene rearrangement pattern were presumably supported by mitochondria! recombination and tandem duplication/random loss models. The reduced trend of the intergenic gap between Q and I also suggests that the event of gene rearrangement can be traced back to early Cynoglossinae differentiation. (C) 2020 Elsevier B.V. All rights reserved.
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