Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa

@article{Zou2012MitochondrialGO,
  title={Mitochondrial Genome of the Freshwater Jellyfish Craspedacusta sowerbyi and Phylogenetics of Medusozoa},
  author={Hong Zou and Jin Zhang and Wenxiang Li and Shan Gong Wu and Guitang Wang},
  journal={PLoS ONE},
  year={2012},
  volume={7}
}
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… 

Figures and Tables from this paper

Complete mitochondrial genome sequence of Aequorea coerulescens
TLDR
The phylogenetic tree among the related 15 jellyfish species showed that A. coerulescens is close to Hydra spp, and its mitochondrial DNA has 14,804 bp in length with a linear structure.
Conserved novel ORFs in the mitochondrial genome of the ctenophore Beroe forskalii
TLDR
This work sequenced and annotated the mitochondrial genomes of three individuals of the beroid ctenophore Beroe forskalii and found that in addition to sharing the same canonical mitochondrial genes as other cTenophores, the B. forSkalii mitochondrial genome contains two URFs, suggesting that ctenphores may have uncharacterized transmembrane proteins present in their mitochondria.
Insights into the transcriptional and translational mechanisms of linear organellar chromosomes in the box jellyfish Alatina alata (Cnidaria: Medusozoa: Cubozoa)
TLDR
This study represents the first survey of mitochondrial gene expression of the linear multi-chromosomal mtDNA in box jellyfish (Cubozoa).
Complete mitochondrial genome of the jellyfish, Rhopilema esculentum Kishinouye 1891 (Cnidaria: Scyphozoa) and the phylogenetic relationship in the related species
TLDR
The phylogenetic tree in the related species showed that R. esculentum is close to Nemopilema nomurai, and the complete mitochondrial genome of Rhopilema esculents was determined by next-generation sequencing.
The Highly Divergent Mitochondrial Genomes Indicate That the Booklouse, Liposcelis bostrychophila (Psocoptera: Liposcelididae) Is a Cryptic Species
TLDR
The results revealed highly divergent mt genomes in the booklouse, L. bostrychophila, and indicate that the species is a cryptic species, which is more closely related to two other species of booklice than to the sexual strains of L.
Occurrence of two distinct lineages of the freshwater jellyfish Craspedacusta sowerbii (Hydrozoa: Limnomedusae) in Italy
TLDR
The presence of both medusae and polyps of this alien taxon in the Large Lake of Monticolo / Montiggl and molecular analyses of mitochondrial 16S sequences showed that this population belongs to a different lineage than that recently described for Sicily (Southern Italy), suggesting there are two different genetic lineages of C. sowerbii in Italy.
Phylogenetic analysis of higher-level relationships within Hydroidolina (Cnidaria: Hydrozoa) using mitochondrial genome data and insight into their mitochondrial transcription
TLDR
The near complete mitochondrial sequence of twenty-six hydroidolinan hydrozoan species is obtained from a range of sources and a mechanism for the expression of mitochondrial mRNA in Hydroidolina is proposed that can be extrapolated to the other medusozoan taxa.
Complete mitochondrial genome of the jellyfish, Chrysaora quinquecirrha (Cnidaria, Scyphozoa)
TLDR
The linear mitochondrial DNA of the jellyfish Chrysaora quinquecirrha is sequenced and shows anti-G bias on 2nd and 3rd positions of PCGs as well as anti-C bias on 1st and 3 third positions ofPCGs.
...
...

References

SHOWING 1-10 OF 56 REFERENCES
Mitochondrial genomes of two demosponges provide insights into an early stage of animal evolution.
TLDR
The findings suggest that the evolution of the typical metazoan mtDNA has been a multistep process in which the compact genome organization and the reduced gene content were established prior to the reduction of tRNA and rRNA structures and the introduction of multiple changes of the translation code.
First Complete Mitochondrial Genome Sequence from a Box Jellyfish Reveals a Highly Fragmented Linear Architecture and Insights into Telomere Evolution
TLDR
The complete mtDNA sequence from the winged box jellyfish Alatina moseri is presented, providing evidence for a gene conversion–based model of telomere evolution and the silent-site nucleotide variation within the A. moseri mtDNA is among the highest observed from a eukaryotic genome and may be associated with elevated rates of recombination.
Evolution of Linear Mitochondrial Genomes in Medusozoan Cnidarians
TLDR
This work determined the sequences of nearly complete linear mtDNA from 24 species representing all four medusozoan classes and posit that these two open reading frames (ORFs) are remnants of a linear plasmid that invaded the mitochondrial genomes of the last common ancestor of Medusozoa and are responsible for its linearity.
The Mitochondrial Genome of Acropora tenuis (Cnidaria; Scleractinia) Contains a Large Group I Intron and a Candidate Control Region
TLDR
Comparisons between a wide range of Acropora species showed that a long hairpin predicted in rns-cox3 is phylogenetically conserved, and allowed the tentative identification of conserved sequence blocks.
A fragmented metazoan organellar genome: the two mitochondrial chromosomes of Hydra magnipapillata
TLDR
The whole mt genome sequence from the hydrozoan Hydra magnipapillata is presented, comprising the first sequence of a fragmented metazoan mt genome encoded on two linear mt chromosomes, rejecting a model of mt replication that has previously been proposed for Hydra.
Mitochondrial genomes of Galathealinum, Helobdella, and Platynereis: sequence and gene arrangement comparisons indicate that Pogonophora is not a phylum and Annelida and Arthropoda are not sister taxa.
TLDR
Comparisons of relative gene arrangements and of the nucleotide and inferred amino acid sequences among these and other published taxa provide strong support for an annelid-mollusk clade that excludes arthropods, and for the inclusion of pogonophorans within Annelida, rather than giving them separate phylum status.
Phylogenetics of Trachylina (Cnidaria: Hydrozoa) with new insights on the evolution of some problematical taxa
TLDR
Molecular data are brought to bear on the question of phylogenetic relationships within Trachylina, suggesting that the polyp stage has been lost independently at least two times within trachyline evolution.
...
...