The complete mitochondrial genome of a cold seep gastropod Phymorhynchus buccinoides (Neogastropoda: Conoidea: Raphitomidae)

Phymorhynchus is a genus of deep-sea snails that are most distributed in hydrothermal vent or cold seep environments. In this study, we presented the complete mitochondrial genome of P. buccinoides, a cold seep snail from the South China Sea. It is the first mitochondrial genome of a cold seep membe...

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Bibliographic Details
Published in:PloS one 2020-11, Vol.15 (11), p.e0242541-e0242541
Main Authors: Du, Lvpei, Cai, Shanya, Liu, Jun, Liu, Ruoyu, Zhang, Haibin
Format: Article
Language:English
Subjects:
Analysis
Animals
Biology and Life Sciences
Codons
Cold
Computer and Information Sciences
Deep sea
Deoxyribonucleic acid
DNA
DNA, Mitochondrial - genetics
Earth Sciences
Engineering
Evolution & development
Gastropoda
Gene Order
Genes
Genes, Mitochondrial
Genetic aspects
Genome, Mitochondrial
Genomes
Hydrothermal plumes
Identification and classification
Mitochondria
Mitochondrial Proteins - genetics
Neogastropods
Phylogenetics
Phylogeny
Phymorhynchus
Physiological aspects
Positive selection
RNA, Ribosomal - genetics
RNA, Transfer - genetics
rRNA
Snails
Snails - genetics
Thermal cycling
Transfer RNA
tRNA
Zoological research
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Summary:Phymorhynchus is a genus of deep-sea snails that are most distributed in hydrothermal vent or cold seep environments. In this study, we presented the complete mitochondrial genome of P. buccinoides, a cold seep snail from the South China Sea. It is the first mitochondrial genome of a cold seep member of the superfamily Conoidea. The mitochondrial genome is 15,764 bp in length, and contains 13 protein-coding genes (PCGs), 2 rRNA genes, and 22 tRNA genes. These genes are encoded on the positive strand, except for 8 tRNA genes that are encoded on the negative strand. The start codon ATG and 3 types of stop codons, TAA, TAG and the truncated termination codon T, are used in the 13 PCGs. All 13 PCGs in the 26 species of Conoidea share the same gene order, while several tRNA genes have been translocated. Phylogenetic analysis revealed that P. buccinoides clustered with Typhlosyrinx sp., Eubela sp., and Phymorhynchus sp., forming the Raphitomidae clade, with high support values. Positive selection analysis showed that a residue located in atp6 (18 S) was identified as the positively selected site with high posterior probabilities, suggesting potential adaption to the cold seep environment. Overall, our data will provide a useful resource on the evolutionary adaptation of cold seep snails for future studies.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0242541