The mitogenome of Ophidascaris wangi isolated from snakes in China

Zhou, Chengyan; Ma, Jun; Tang, Qi-Wu; Zhu, Xing‐Quan; Xu, Qianming

doi:10.1007/s00436-021-07069-z

Cited by 7 publications

(6 citation statements)

References 42 publications

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“…In the present study, the family Ascarididae was closely related to the family Anisakidae ( Fig. 3 ), different from the previous study where the family Ascarididae was closely related to Toxocaridae ( Zhou et al, 2021 ). In addition, results also supported the monophyly of all 5 families and all 11 genera within the superfamily Ascaridoidea with strong support (BPP = 1, Bf >70, Fig.…”

Section: Resultscontrasting

confidence: 99%

“…Within the superfamily Ascaridoidea, both BI and ML showed identical topologies. Among the family Ascarididae, the genera Ascaris , Baylisascaris , Toxascaris , and Parascaris had a closer relationship than Ophidascaris , which was similar to Zhou et al (2021) reported. Based on morphological descriptions, the genus Ophidascaris was classified as a member of the superfamily Ascaridoidea ( Pinto et al, 2010 ), and phylogenetic analyses suggested the genus Ophidascaris was more related to the family Ascaridae.…”

Section: Resultssupporting

confidence: 87%

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Complete Mitochondrial Genome of Contracaecum sp. (Nematoda: Ascarididae) from night herons in China

Deng

Wang

et al. 2022

Journal of Nematology

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Contracaecum species are zooparasitic anisakid nematodes and occur in gastrointestinal tracts of vertebrate/invertebrate animals, including humans, causing gastrointestinal pain, diarrhea, and increasingly severe vomiting. Although the complete mitochondrial (mt) genome (mitogenome) of Contracaecum sp. isolated from night herons in Beijing has been reported, the detailed information about this mt sequence is still puzzling. In the present study, we described the detailed characteristics across the complete mt DNA of Contracaecum sp., which includes 36 genes consisting of 12 protein genes, 22 transfer RNAs (tRNAs), 2 ribosomal RNAs (rRNAs), and 2 noncoding regions (NCRs), and all genes have the same orientation of transcription. The AT content in the complete mitogenome of Contracaecum sp. was 72.2%, and it was the least value (66.7%) in the cox1 gene but was the highest rate (84.1%) in NCRs. The highest nucleotide diversity (Pi) among the genus Contracaecum was nad4 (0.190) and the least was cox1 (0.125), which indicates that nad4 might have the potential ability as useful markers to detect cryptic species in the genus Contracaecum or subspecies. Based on the maximum likelihood (ML) and Bayesian inference (BI) computational algorithms within subfamilies Ascaridoidea and Heterakoidea, the results supported that Contracaecum sp. was a new species and the family Ascaridiidae was paraphyletic. The complete mitogenome sequence of Contracaecum sp. supported a clear recognition of Contracaecum species and provided the potential existence of cryptic species in the genus Contracaecum. Our findings would better contribute to the surveillance, molecular epidemiology, and control of Contracaecum.

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Section: Resultscontrasting

confidence: 99%

Section: Resultssupporting

confidence: 87%

Complete Mitochondrial Genome of Contracaecum sp. (Nematoda: Ascarididae) from night herons in China

Deng

Wang

et al. 2022

Journal of Nematology

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“…While compared with other genera in Ascaridae, there was a relatively long evolutionary distance in Ascaridae. A previous study presented that the family Ascarididae was more related to Toxocaridae(Zhou et al 2021). In this study, the family Ascarididae was closer taxa to…”

supporting

confidence: 57%

Characterization of the Complete Mitochondrial Genome Sequence of Contracaecum sp. (Nematoda: Ascarididae) from China

Deng

Wang

et al. 2022

Preprint

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Contracaecum spp. is a zooparasitic anisakid nematode and occurs in gastrointestinal tracts of vertebrate/invertebrate animals, humans included, causing gastrointestinal pain, diarrhea, and increasingly severe vomiting. To date, thousands of sequences have been published in GenBank, while complete mitochondrial genomes (mitogenome) of Contracaecum spp. are still limited. Although the complete mitogenome of Contracaecum species isolated from night herons in Beijing has been reported, the detailed information about it is still puzzling. In the present study, we describe the detailed characteristics within the complete mt DNA Contracaecum sp.. The AT-content in the complete mitogenome of Contracaecum sp. was 72.2%. The nucleotide diversity (Pi) among genus Contracaecum ranged from 0.124 (cox1) to 0.181 (nad4). Based on the computational algorithms Maximum Likelihood (ML) and Bayesian Inference (BI) within Ascaridoidea and Heterakoidea, the results supported Contracacum sp. Beijing isolate was a new species in the genus Contracaecum, and supported the family Ascaridiidae was paraphyletic.

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“…T. apodemi had higher identities with that of T. canis than those of other congeners. This level of mt genome divergence is lower than that between Ophidascaris wangi and Toxascaris leonina (19.77%), and higher than that of T. leonina from cheetah and dog (7.2%) and the Pseudoterranova decipiens species complex (3.8–9.4%) (Liu et al 2016; Jin et al 2019; Zhou et al 2021). Nevertheless, the identities of the amino acid sequence of five species in Toxocara were similar at 89.8–90.8%.…”

Section: Resultsmentioning

confidence: 89%

Characterisation of the mitochondrial genome and phylogenetic analysis of Toxocara apodemi (Nematoda: Ascarididae)

Gao,

Hu,

et al. 2024

J. Helminthol.

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We first sequenced and characterised the complete mitochondrial genome of Toxocara apodeme, then studied the evolutionary relationship of the species within Toxocaridae. The complete mitochondrial genome was amplified using PCR with 14 specific primers. The mitogenome length was 14303 bp in size, including 12 PCGs (encoding 3,423 amino acids), 22 tRNAs, 2 rRNAs, and 2 NCRs, with 68.38% A+T contents. The mt genomes of T. apodemi had relatively compact structures with 11 intergenic spacers and 5 overlaps. Comparative analyses of the nucleotide sequences of complete mt genomes showed that T. apodemi had higher identities with T. canis than other congeners. A sliding window analysis of 12 PCGs among 5 Toxocara species indicated that nad4 had the highest sequence divergence, and cox1 was the least variable gene. Relative synonymous codon usage showed that UUG, ACU, CCU, CGU, and UCU most frequently occurred in the complete genomes of T. apodemi. The Ka/Ks ratio showed that all Toxocara mt genes were subject to purification selection. The largest genetic distance between T. apodemi and the other 4 congeneric species was found in nad2, and the smallest was found in cox2. Phylogenetic analyses based on the concatenated amino acid sequences of 12 PCGs demonstrated that T. apodemi formed a distinct branch and was always a sister taxon to other congeneric species. The present study determined the complete mt genome sequences of T. apodemi, which provide novel genetic markers for further studies of the taxonomy, population genetics, and systematics of the Toxocaridae nematodes.

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The mitogenome of Ophidascaris wangi isolated from snakes in China

Cited by 7 publications

References 42 publications

Complete Mitochondrial Genome of Contracaecum sp. (Nematoda: Ascarididae) from night herons in China

Complete Mitochondrial Genome of Contracaecum sp. (Nematoda: Ascarididae) from night herons in China

Characterization of the Complete Mitochondrial Genome Sequence of Contracaecum sp. (Nematoda: Ascarididae) from China

Characterisation of the mitochondrial genome and phylogenetic analysis of Toxocara apodemi (Nematoda: Ascarididae)

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