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Draft genome sequences of 'Candidatus Chloroploca asiatica' and 'Candidatus Viridilinea mediisalina', candidate representatives of the Chloroflexales order: phylogenetic and taxonomic implications.

ABSTRACT: 'Candidatus Chloroploca asiatica' B7-9 and 'Candidatus Viridilinea mediisalina' Kir15-3F are mesophilic filamentous anoxygenic phototrophic bacteria from alkaline aquatic environments. Both bacteria became available in the last few years and only in stable enrichment culture. In this study, we report the draft genomic sequences of 'Ca. Chloroploca asiatica' B7-9 and 'Ca. Viridilinea mediisalina' Kir15-3F, which were assembled from metagenomes of their cultures with a fold coverage 86.3× and 163.8×, respectively. The B7-9 (5.8 Mb) and the Kir15-3F (5.6 Mb) draft genome harbors 4818 and 4595 predicted protein-coding genes, respectively. In this article, we analyzed the phylogeny of representatives of the Chloroflexineae suborder in view of the appearance of new genomic data. These data were used for the revision of earlier published group-specific conserved signature indels and for searching for novel signatures for taxons in the Chloroflexineae suborder.

SUBMITTER: Grouzdev DS

PROVIDER: S-EPMC6180586 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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Draft genome sequences of 'Candidatus Chloroploca asiatica' and 'Candidatus Viridilinea mediisalina', candidate representatives of the Chloroflexales order: phylogenetic and taxonomic implications.

Grouzdev Denis S DS Rysina Maria S MS Bryantseva Irina A IA Gorlenko Vladimir M VM Gaisin Vasil A VA

Standards in genomic sciences 20181011

'Candidatus Chloroploca asiatica' B7-9 and 'Candidatus Viridilinea mediisalina' Kir15-3F are mesophilic filamentous anoxygenic phototrophic bacteria from alkaline aquatic environments. Both bacteria became available in the last few years and only in stable enrichment culture. In this study, we report the draft genomic sequences of 'Ca. Chloroploca asiatica' B7-9 and 'Ca. Viridilinea mediisalina' Kir15-3F, which were assembled from metagenomes of their cultures with a ...[more]

PMID: 30338027

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Project description:BackgroundThe Eucotylidae Cohn, 1904 (Superfamily: Microphalloidea), is a family of digeneans parasitic in kidneys of birds as adults. The group is characterized by the high level of morphological similarities among genera and unclear systematic value of morphological characters traditionally used for their differentiation. In the present study, we sequenced the complete or nearly complete mitogenomes (mt genome) of two eucotylids representing the genera Tamerlania (T. zarudnyi) and Tanaisia (Tanaisia sp.). They represent the first sequenced mt genomes of any member of the superfamily Microphalloidea.MethodsA comparative mitogenomic analysis of the two newly sequenced eucotylids was conducted for the investigation of mitochondrial gene arrangement, contents and genetic distance. Phylogenetic position of the family Eucotylidae within the order Plagiorchiida was examined using nucleotide sequences of mitochondrial protein-coding genes (PCGs) plus RNAs using maximum likelihood (ML) and Bayesian inference (BI) methods. BI phylogeny based on concatenated amino acids sequences of PCGs was also conducted to determine possible effects of silent mutations.ResultsThe complete mt genome of T. zarudnyi was 16,188 bp and the nearly complete mt genome of Tanaisia sp. was 13,953 bp in length. A long string of additional amino acids (about 123 aa) at the 5' end of the cox1 gene in both studied eucotylid mt genomes has resulted in the cox1 gene of eucotylids being longer than in all previously sequenced digeneans. The rrnL gene was also longer than previously reported in any digenean mitogenome sequenced so far. The TΨC and DHU loops of the tRNAs varied greatly between the two eucotylids while the anticodon loop was highly conserved. Phylogenetic analyses based on mtDNA nucleotide and amino acids sequences (as a separate set) positioned eucotylids as a sister group to all remaining members of the order Plagiorchiida. Both ML and BI phylogenies revealed the paraphyletic nature of the superfamily Gorgoderoidea and the suborder Xiphidiata.ConclusionsThe average sequence identity, combined nucleotide diversity and Kimura-2 parameter distances between the two eucotylid mitogenomes demonstrated that atp6, nad5, nad4L and nad6 genes are better markers than the traditionally used cox1 or nad1 for the species differentiation and population-level studies of eucotylids because of their higher variability. The position of the Dicrocoeliidae and Eucotylidae outside the clade uniting other xiphidiatan trematodes strengthened the argument for the need for re-evaluation of the taxonomic content of the Xiphidiata.

Dataset Information

Draft genome sequences of 'Candidatus Chloroploca asiatica' and 'Candidatus Viridilinea mediisalina', candidate representatives of the Chloroflexales order: phylogenetic and taxonomic implications.

Publications

Draft genome sequences of '<i>Candidatus</i> Chloroploca asiatica' and '<i>Candidatus</i> Viridilinea mediisalina', candidate representatives of the <i>Chloroflexales</i> order: phylogenetic and taxonomic implications.

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Dataset Information

Draft genome sequences of 'Candidatus Chloroploca asiatica' and 'Candidatus Viridilinea mediisalina', candidate representatives of the Chloroflexales order: phylogenetic and taxonomic implications.

Publications

Draft genome sequences of '&lt;i&gt;Candidatus&lt;/i&gt; Chloroploca asiatica' and '&lt;i&gt;Candidatus&lt;/i&gt; Viridilinea mediisalina', candidate representatives of the &lt;i&gt;Chloroflexales&lt;/i&gt; order: phylogenetic and taxonomic implications.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Draft genome sequences of '<i>Candidatus</i> Chloroploca asiatica' and '<i>Candidatus</i> Viridilinea mediisalina', candidate representatives of the <i>Chloroflexales</i> order: phylogenetic and taxonomic implications.