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Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa
Zou, Hong1,2,3; Zhang, Jin1,2,3; Li, Wenxiang1,2; Wu, Shangong1,2; Wang, Guitang1,2; Wang, GT (reprint author), Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Wuhan, Hubei Province, Peoples R China.
2012-12-11
Source PublicationPLOS ONE
ISSN1932-6203
Volume7Issue:12Pages:e51465
AbstractThe 17,922 base pairs (bp) nucleotide sequence of the linear mitochondrial DNA (mtDNA) molecule of the freshwater jellyfish Craspedacusta sowerbyi (Hydrozoa, Trachylina, Limnomedusae) has been determined. This sequence exhibits surprisingly low A+T content (57.1%), containing genes for 13 energy pathway proteins, a small and a large subunit rRNAs, and methionine and tryptophan tRNAs. Mitochondrial ancestral medusozoan gene order (AMGO) was found in the C. sowerbyi, as those found in Cubaia aphrodite (Hydrozoa, Trachylina, Limnomedusae), discomedusan Scyphozoa and Staurozoa. The genes of C. sowerbyi mtDNA are arranged in two clusters with opposite transcriptional polarities, whereby transcription proceeds toward the ends of the DNA molecule. Identical inverted terminal repeats (ITRs) flank the ends of the mitochondrial DNA molecule, a characteristic typical of medusozoans. In addition, two open reading frames (ORFs) of 354 and 1611 bp in length were found downstream of the large subunit rRNA gene, similar to the two ORFs of ORF314 and polB discovered in the linear mtDNA of C. aphrodite, discomedusan Scyphozoa and Staurozoa. Phylogenetic analyses of C. sowerbyi and other cnidarians were carried out based on both nucleotide and inferred amino acid sequences of the 13 mitochondrial energy pathway genes. Our working hypothesis supports the monophyletic Medusozoa being a sister group to Octocorallia (Cnidaria, Anthozoa). Within Medusozoa, the phylogenetic analysis suggests that Staurozoa may be the earliest diverging class and the sister group of all other medusozoans. Cubozoa and coronate Scyphozoa form a clade that is the sister group of Hydrozoa plus discomedusan Scyphozoa. Hydrozoa is the sister group of discomedusan Scyphozoa. Semaeostomeae is a paraphyletic clade with Rhizostomeae, while Limnomedusae (Trachylina) is the sister group of hydroidolinans and may be the earliest diverging lineage among Hydrozoa.; The 17,922 base pairs (bp) nucleotide sequence of the linear mitochondrial DNA (mtDNA) molecule of the freshwater jellyfish Craspedacusta sowerbyi (Hydrozoa, Trachylina, Limnomedusae) has been determined. This sequence exhibits surprisingly low A+T content (57.1%), containing genes for 13 energy pathway proteins, a small and a large subunit rRNAs, and methionine and tryptophan tRNAs. Mitochondrial ancestral medusozoan gene order (AMGO) was found in the C. sowerbyi, as those found in Cubaia aphrodite (Hydrozoa, Trachylina, Limnomedusae), discomedusan Scyphozoa and Staurozoa. The genes of C. sowerbyi mtDNA are arranged in two clusters with opposite transcriptional polarities, whereby transcription proceeds toward the ends of the DNA molecule. Identical inverted terminal repeats (ITRs) flank the ends of the mitochondrial DNA molecule, a characteristic typical of medusozoans. In addition, two open reading frames (ORFs) of 354 and 1611 bp in length were found downstream of the large subunit rRNA gene, similar to the two ORFs of ORF314 and polB discovered in the linear mtDNA of C. aphrodite, discomedusan Scyphozoa and Staurozoa. Phylogenetic analyses of C. sowerbyi and other cnidarians were carried out based on both nucleotide and inferred amino acid sequences of the 13 mitochondrial energy pathway genes. Our working hypothesis supports the monophyletic Medusozoa being a sister group to Octocorallia (Cnidaria, Anthozoa). Within Medusozoa, the phylogenetic analysis suggests that Staurozoa may be the earliest diverging class and the sister group of all other medusozoans. Cubozoa and coronate Scyphozoa form a clade that is the sister group of Hydrozoa plus discomedusan Scyphozoa. Hydrozoa is the sister group of discomedusan Scyphozoa. Semaeostomeae is a paraphyletic clade with Rhizostomeae, while Limnomedusae (Trachylina) is the sister group of hydroidolinans and may be the earliest diverging lineage among Hydrozoa.
SubtypeArticle
KeywordClass-level Relationships Phylum-cnidaria Evolution Hydrozoa Sequence Lankester Insights Medusae Models Taxa
Department[Zou, Hong ; Zhang, Jin ; Li, Wenxiang ; Wu, Shangong ; Wang, Guitang] Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Wuhan, Hubei Province, Peoples R China ; [Zou, Hong ; Zhang, Jin ; Li, Wenxiang ; Wu, Shangong ; Wang, Guitang] Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei Province, Peoples R China ; [Zou, Hong ; Zhang, Jin] Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
DOI10.1371/journal.pone.0051465
WOS HeadingsScience & Technology
Funding OrganizationNational Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705] ; National Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705] ; National Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705] ; National Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705]
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000312290800064
WOS KeywordCLASS-LEVEL RELATIONSHIPS ; PHYLUM-CNIDARIA ; EVOLUTION ; HYDROZOA ; SEQUENCE ; LANKESTER ; INSIGHTS ; MEDUSAE ; MODELS ; TAXA
Funding OrganizationNational Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705] ; National Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705] ; National Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705] ; National Technology System for Conventional Freshwater Fish Industries [CARS-46-08]; National Program on Key Basic Research Project [2009CB118705]
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/19315
Collection鱼类生物学及渔业生物技术研究中心_期刊论文
Corresponding AuthorWang, GT (reprint author), Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Wuhan, Hubei Province, Peoples R China.
Affiliation1.Chinese Acad Sci, Key Lab Aquat Biodivers & Conservat, Wuhan, Hubei Province, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Hubei Province, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Zou, Hong,Zhang, Jin,Li, Wenxiang,et al. Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa[J]. PLOS ONE,2012,7(12):e51465.
APA Zou, Hong,Zhang, Jin,Li, Wenxiang,Wu, Shangong,Wang, Guitang,&Wang, GT .(2012).Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa.PLOS ONE,7(12),e51465.
MLA Zou, Hong,et al."Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa".PLOS ONE 7.12(2012):e51465.
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