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The Plastid Genome of the Cryptomonad Teleaulax amphioxeia

Teleaulax amphioxeia is a photosynthetic unicellular cryptophyte alga that is distributed throughout marine habitats worldwide. This alga is an important plastid donor to the dinoflagellate Dinophysis caudata through the ciliate Mesodinium rubrum in the marine food web. To better understand the geno...

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Autores principales: Kim, Jong Im, Yoon, Hwan Su, Yi, Gangman, Kim, Hyung Seop, Yih, Wonho, Shin, Woongghi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4457928/
https://www.ncbi.nlm.nih.gov/pubmed/26047475
http://dx.doi.org/10.1371/journal.pone.0129284
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author Kim, Jong Im
Yoon, Hwan Su
Yi, Gangman
Kim, Hyung Seop
Yih, Wonho
Shin, Woongghi
author_facet Kim, Jong Im
Yoon, Hwan Su
Yi, Gangman
Kim, Hyung Seop
Yih, Wonho
Shin, Woongghi
author_sort Kim, Jong Im
collection PubMed
description Teleaulax amphioxeia is a photosynthetic unicellular cryptophyte alga that is distributed throughout marine habitats worldwide. This alga is an important plastid donor to the dinoflagellate Dinophysis caudata through the ciliate Mesodinium rubrum in the marine food web. To better understand the genomic characteristics of T. amphioxeia, we have sequenced and analyzed its plastid genome. The plastid genome sequence of T. amphioxeia is similar to that of Rhodomonas salina, and they share significant synteny. This sequence exhibits less similarity to that of Guillardia theta, the representative plastid genome of photosynthetic cryptophytes. The gene content and order of the three photosynthetic cryptomonad plastid genomes studied is highly conserved. The plastid genome of T. amphioxeia is composed of 129,772 bp and includes 143 protein-coding genes, 2 rRNA operons and 30 tRNA sequences. The DNA polymerase III gene (dnaX) was most likely acquired via lateral gene transfer (LGT) from a firmicute bacterium, identical to what occurred in R. salina. On the other hand, the psbN gene was independently encoded by the plastid genome without a reverse transcriptase gene as an intron. To clarify the phylogenetic relationships of the algae with red-algal derived plastids, phylogenetic analyses of 32 taxa were performed, including three previously sequenced cryptophyte plastid genomes containing 93 protein-coding genes. The stramenopiles were found to have branched out from the Chromista taxa (cryptophytes, haptophytes, and stramenopiles), while the cryptophytes and haptophytes were consistently grouped into sister relationships with high resolution.
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spelling pubmed-44579282015-06-09 The Plastid Genome of the Cryptomonad Teleaulax amphioxeia Kim, Jong Im Yoon, Hwan Su Yi, Gangman Kim, Hyung Seop Yih, Wonho Shin, Woongghi PLoS One Research Article Teleaulax amphioxeia is a photosynthetic unicellular cryptophyte alga that is distributed throughout marine habitats worldwide. This alga is an important plastid donor to the dinoflagellate Dinophysis caudata through the ciliate Mesodinium rubrum in the marine food web. To better understand the genomic characteristics of T. amphioxeia, we have sequenced and analyzed its plastid genome. The plastid genome sequence of T. amphioxeia is similar to that of Rhodomonas salina, and they share significant synteny. This sequence exhibits less similarity to that of Guillardia theta, the representative plastid genome of photosynthetic cryptophytes. The gene content and order of the three photosynthetic cryptomonad plastid genomes studied is highly conserved. The plastid genome of T. amphioxeia is composed of 129,772 bp and includes 143 protein-coding genes, 2 rRNA operons and 30 tRNA sequences. The DNA polymerase III gene (dnaX) was most likely acquired via lateral gene transfer (LGT) from a firmicute bacterium, identical to what occurred in R. salina. On the other hand, the psbN gene was independently encoded by the plastid genome without a reverse transcriptase gene as an intron. To clarify the phylogenetic relationships of the algae with red-algal derived plastids, phylogenetic analyses of 32 taxa were performed, including three previously sequenced cryptophyte plastid genomes containing 93 protein-coding genes. The stramenopiles were found to have branched out from the Chromista taxa (cryptophytes, haptophytes, and stramenopiles), while the cryptophytes and haptophytes were consistently grouped into sister relationships with high resolution. Public Library of Science 2015-06-05 /pmc/articles/PMC4457928/ /pubmed/26047475 http://dx.doi.org/10.1371/journal.pone.0129284 Text en © 2015 Kim et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Kim, Jong Im
Yoon, Hwan Su
Yi, Gangman
Kim, Hyung Seop
Yih, Wonho
Shin, Woongghi
The Plastid Genome of the Cryptomonad Teleaulax amphioxeia
title The Plastid Genome of the Cryptomonad Teleaulax amphioxeia
title_full The Plastid Genome of the Cryptomonad Teleaulax amphioxeia
title_fullStr The Plastid Genome of the Cryptomonad Teleaulax amphioxeia
title_full_unstemmed The Plastid Genome of the Cryptomonad Teleaulax amphioxeia
title_short The Plastid Genome of the Cryptomonad Teleaulax amphioxeia
title_sort plastid genome of the cryptomonad teleaulax amphioxeia
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4457928/
https://www.ncbi.nlm.nih.gov/pubmed/26047475
http://dx.doi.org/10.1371/journal.pone.0129284
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