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The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods
In this study, the complete mitochondrial (mt) genome sequence of the South China deep‐sea giant isopod Bathynomus sp. was determined, and this study is the first to explore in detail the mt genome of a deep‐sea member of the order Isopoda. This species belongs to the genus Bathynomus, the members o...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5355201/ https://www.ncbi.nlm.nih.gov/pubmed/28331594 http://dx.doi.org/10.1002/ece3.2737 |
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author | Shen, Yanjun Kou, Qi Zhong, Zaixuan Li, Xinzheng He, Lisheng He, Shunping Gan, Xiaoni |
author_facet | Shen, Yanjun Kou, Qi Zhong, Zaixuan Li, Xinzheng He, Lisheng He, Shunping Gan, Xiaoni |
author_sort | Shen, Yanjun |
collection | PubMed |
description | In this study, the complete mitochondrial (mt) genome sequence of the South China deep‐sea giant isopod Bathynomus sp. was determined, and this study is the first to explore in detail the mt genome of a deep‐sea member of the order Isopoda. This species belongs to the genus Bathynomus, the members of which are saprophagous residents of the deep‐sea benthic environment; based on their large size, Bathynomus is included in the “supergiant group” of isopods. The mt genome of Bathynomus sp. is 14,965 bp in length and consists of 13 protein‐coding genes, two ribosomal RNA genes, only 18 transfer RNA genes, and a noncoding control region 362 bp in length, which is the smallest control region discovered in Isopoda to date. Although the overall genome organization is typical for metazoans, the mt genome of Bathynomus sp. shows a number of derived characters, such as an inversion of 10 genes when compared to the pancrustacean ground pattern. Rearrangements in some genes (e.g., cob, trnT, nad5, and trnF) are shared by nearly all isopod mt genomes analyzed thus far, and when compared to the putative isopod ground pattern, five rearrangements were found in Bathynomus sp. Two tRNAs exhibit modified secondary structures: The TΨC arm is absent from trnQ, and trnC lacks the DHU. Within the class Malacostraca, trnC arm loss is only found in other isopods. Phylogenetic analysis revealed that Bathynomus sp. (Cymothoida) and Sphaeroma serratum (Sphaeromatidea) form a single clade, although it is unclear whether Cymothoida is monophyletic or paraphyletic. Moreover, the evolutionary rate of Bathynomus sp. (dN/dS [nonsynonymous mutational rate/synonymous mutational rate] = 0.0705) is the slowest measured to date among Cymothoida, which may be associated with its relatively constant deep‐sea environment. Overall, our results may provide useful information for understanding the evolution of deep‐sea Isopoda species. |
format | Online Article Text |
id | pubmed-5355201 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-53552012017-03-22 The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods Shen, Yanjun Kou, Qi Zhong, Zaixuan Li, Xinzheng He, Lisheng He, Shunping Gan, Xiaoni Ecol Evol Original Research In this study, the complete mitochondrial (mt) genome sequence of the South China deep‐sea giant isopod Bathynomus sp. was determined, and this study is the first to explore in detail the mt genome of a deep‐sea member of the order Isopoda. This species belongs to the genus Bathynomus, the members of which are saprophagous residents of the deep‐sea benthic environment; based on their large size, Bathynomus is included in the “supergiant group” of isopods. The mt genome of Bathynomus sp. is 14,965 bp in length and consists of 13 protein‐coding genes, two ribosomal RNA genes, only 18 transfer RNA genes, and a noncoding control region 362 bp in length, which is the smallest control region discovered in Isopoda to date. Although the overall genome organization is typical for metazoans, the mt genome of Bathynomus sp. shows a number of derived characters, such as an inversion of 10 genes when compared to the pancrustacean ground pattern. Rearrangements in some genes (e.g., cob, trnT, nad5, and trnF) are shared by nearly all isopod mt genomes analyzed thus far, and when compared to the putative isopod ground pattern, five rearrangements were found in Bathynomus sp. Two tRNAs exhibit modified secondary structures: The TΨC arm is absent from trnQ, and trnC lacks the DHU. Within the class Malacostraca, trnC arm loss is only found in other isopods. Phylogenetic analysis revealed that Bathynomus sp. (Cymothoida) and Sphaeroma serratum (Sphaeromatidea) form a single clade, although it is unclear whether Cymothoida is monophyletic or paraphyletic. Moreover, the evolutionary rate of Bathynomus sp. (dN/dS [nonsynonymous mutational rate/synonymous mutational rate] = 0.0705) is the slowest measured to date among Cymothoida, which may be associated with its relatively constant deep‐sea environment. Overall, our results may provide useful information for understanding the evolution of deep‐sea Isopoda species. John Wiley and Sons Inc. 2017-02-16 /pmc/articles/PMC5355201/ /pubmed/28331594 http://dx.doi.org/10.1002/ece3.2737 Text en © 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Research Shen, Yanjun Kou, Qi Zhong, Zaixuan Li, Xinzheng He, Lisheng He, Shunping Gan, Xiaoni The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods |
title | The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods |
title_full | The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods |
title_fullStr | The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods |
title_full_unstemmed | The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods |
title_short | The first complete mitogenome of the South China deep‐sea giant isopod Bathynomus sp. (Crustacea: Isopoda: Cirolanidae) allows insights into the early mitogenomic evolution of isopods |
title_sort | first complete mitogenome of the south china deep‐sea giant isopod bathynomus sp. (crustacea: isopoda: cirolanidae) allows insights into the early mitogenomic evolution of isopods |
topic | Original Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5355201/ https://www.ncbi.nlm.nih.gov/pubmed/28331594 http://dx.doi.org/10.1002/ece3.2737 |
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