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Complete sequence of mitochondrial DNA of Gracilaria tenuistipitata (Rhodophyta).

ABSTRACT: We sequenced and analysed the complete mitogenome of Gracilaria tenuistipitata. The complete G. tenuistipitata mitogenome is 25,819?bp long, containing 50 genes, including 24 protein-coding genes, one intron, two rRNA genes, 23 tRNA genes, and one unidentified open reading frame. Twenty-three of the 24 (95.83%) protein-coding genes ended with the TAA stop codon, and one (4.17%) with TAG (rps3 gene). All protein-coding genes in G. tenuistipitata were found to contain the start codon ATG. Phylogenetic analysis revealed that G. tenuistipitata clustered with G. chilensis. The complete mitochondrial genome sequence provided here should be useful for elucidation of Gracilaria evolution.

SUBMITTER: Liu N

PROVIDER: S-EPMC7799448 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature

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Complete sequence of mitochondrial DNA of Gracilaria tenuistipitata (Rhodophyta).

Liu Na N Li Yue Y Liu Cui C Liu Tao T Chen Weizhou W

Mitochondrial DNA. Part B, Resources 20180725 2

We sequenced and analysed the complete mitogenome of Gracilaria tenuistipitata. The complete G. tenuistipitata mitogenome is 25,819 bp long, containing 50 genes, including 24 protein-coding genes, one intron, two rRNA genes, 23 tRNA genes, and one unidentified open reading frame. Twenty-three of the 24 (95.83%) protein-coding genes ended with the TAA stop codon, and one (4.17%) with TAG (rps3 gene). All protein-coding genes in G. tenuistipitata were found to contain t ...[more]

PMID: 33474333

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Project description:The chloroplast genome of Gracilaria firma was sequenced in view of its role as an economically important marine crop with wide industrial applications. To date, there are only 15 chloroplast genomes published for the Florideophyceae. Apart from presenting the complete chloroplast genome of G. firma, this study also assessed the utility of genome-scale data to address the phylogenetic relationships within the subclass Rhodymeniophycidae. The synteny and genome structure of the chloroplast genomes across the taxa of Eurhodophytina was also examined.The chloroplast genome of Gracilaria firma maps as a circular molecule of 187,001 bp and contains 252 genes, which are distributed on both strands and consist of 35 RNA genes (3 rRNAs, 30 tRNAs, tmRNA and a ribonuclease P RNA component) and 217 protein-coding genes, including the unidentified open reading frames. The chloroplast genome of G. firma is by far the largest reported for Gracilariaceae, featuring a unique intergenic region of about 7000 bp with discontinuous vestiges of red algal plasmid DNA sequences interspersed between the nblA and cpeB genes. This chloroplast genome shows similar gene content and order to other Florideophycean taxa. Phylogenomic analyses based on the concatenated amino acid sequences of 146 protein-coding genes confirmed the monophyly of the classes Bangiophyceae and Florideophyceae with full nodal support. Relationships within the subclass Rhodymeniophycidae in Florideophyceae received moderate to strong nodal support, and the monotypic family of Gracilariales were resolved with maximum support.Chloroplast genomes hold substantial information that can be tapped for resolving the phylogenetic relationships of difficult regions in the Rhodymeniophycidae, which are perceived to have experienced rapid radiation and thus received low nodal support, as exemplified in this study. The present study shows that chloroplast genome of G. firma could serve as a key link to the full resolution of Gracilaria sensu lato complex and recognition of Hydropuntia as a genus distinct from Gracilaria sensu stricto.

Dataset Information

Complete sequence of mitochondrial DNA of Gracilaria tenuistipitata (Rhodophyta).

Publications

Complete sequence of mitochondrial DNA of <i>Gracilaria tenuistipitata</i> (Rhodophyta).

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