Dataset Information

Mitochondrial genome of Dinophilus gyrociliatus (Annelida: Dinophilidae).

ABSTRACT: Here we report the 14,678?bp mitochondrial genome of the annelid Dinophilus gyrociliatus, the first mitochondrial genome from Dinophilidae. We recovered 13 protein-coding genes, two rRNA, and 21 tRNA, the order of which is different from other annelid species. Interestingly, trnS1 was not recovered. The GC% across the genome was 34.20%.

SUBMITTER: David KT

PROVIDER: S-EPMC7800660 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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Mitochondrial genome of <i>Dinophilus gyrociliatus</i> (Annelida: Dinophilidae).

David Kyle T KT Halanych Kenneth M KM

Mitochondrial DNA. Part B, Resources 20171125 2

Here we report the 14,678 bp mitochondrial genome of the annelid <i>Dinophilus gyrociliatus</i>, the first mitochondrial genome from Dinophilidae. We recovered 13 protein-coding genes, two rRNA, and 21 tRNA, the order of which is different from other annelid species. Interestingly, trnS1 was not recovered. The GC% across the genome was 34.20%. ...[more]

PMID: 33474001

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Project description:BACKGROUND:There are many advantages to the application of complete mitochondrial (mt) genomes in the accurate reconstruction of phylogenetic relationships in Metazoa. Although over one thousand metazoan genomes have been sequenced, the taxonomic sampling is highly biased, left with many phyla without a single representative of complete mitochondrial genome. Sipuncula (peanut worms or star worms) is a small taxon of worm-like marine organisms with an uncertain phylogenetic position. In this report, we present the mitochondrial genome sequence of Phascolosoma esculenta, the first complete mitochondrial genome of the phylum. RESULTS:The mitochondrial genome of P.esculenta is 15,494 bp in length. The coding strand consists of 32.1% A, 21.5% C, 13.0% G, and 33.4% T bases (AT = 65.5%; AT skew = -0.019; GC skew = -0.248). It contains thirteen protein-coding genes (PCGs) with 3,709 codons in total, twenty-two transfer RNA genes, two ribosomal RNA genes and a non-coding AT-rich region (AT = 74.2%). All of the 37 identified genes are transcribed from the same DNA strand. Compared with the typical set of metazoan mt genomes, sipunculid lacks trnR but has an additional trnM. Maximum Likelihood and Bayesian analyses of the protein sequences show that Myzostomida, Sipuncula and Annelida (including echiurans and pogonophorans) form a monophyletic group, which supports a closer relationship between Sipuncula and Annelida than with Mollusca, Brachiopoda, and some other lophotrochozoan groups. CONCLUSION:This is the first report of a complete mitochondrial genome as a representative within the phylum Sipuncula. It shares many more similar features with the four known annelid and one echiuran mtDNAs. Firstly, sipunculans and annelids share quite similar gene order in the mitochondrial genome, with all 37 genes located on the same strand; secondly, phylogenetic analyses based on the concatenated protein sequences also strongly support the sipunculan + annelid clade (including echiurans and pogonophorans). Hence annelid "key-characters" including segmentation may be more labile than previously assumed.

Dataset Information

Mitochondrial genome of Dinophilus gyrociliatus (Annelida: Dinophilidae).

Publications

Mitochondrial genome of <i>Dinophilus gyrociliatus</i> (Annelida: Dinophilidae).

Similar Datasets

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