Mitochondrial genome evolution in the Saccharomyces sensu stricto complex

Exploring the evolutionary patterns of mitochondrial genomes is important for our understanding of the Saccharomyces sensu stricto (SSS) group, which is a model system for genomic evolution and ecological analysis. In this study, we first obtained the complete mitochondrial sequences of two importan...

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Autores principales: Ruan, Jiangxing, Cheng, Jian, Zhang, Tongcun, Jiang, Huifeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5558958/
https://www.ncbi.nlm.nih.gov/pubmed/28813471
http://dx.doi.org/10.1371/journal.pone.0183035
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author Ruan, Jiangxing
Cheng, Jian
Zhang, Tongcun
Jiang, Huifeng
author_facet Ruan, Jiangxing
Cheng, Jian
Zhang, Tongcun
Jiang, Huifeng
author_sort Ruan, Jiangxing
collection PubMed
description Exploring the evolutionary patterns of mitochondrial genomes is important for our understanding of the Saccharomyces sensu stricto (SSS) group, which is a model system for genomic evolution and ecological analysis. In this study, we first obtained the complete mitochondrial sequences of two important species, Saccharomyces mikatae and Saccharomyces kudriavzevii. We then compared the mitochondrial genomes in the SSS group with those of close relatives, and found that the non-coding regions evolved rapidly, including dramatic expansion of intergenic regions, fast evolution of introns and almost 20-fold higher rearrangement rates than those of the nuclear genomes. However, the coding regions, and especially the protein-coding genes, are more conserved than those in the nuclear genomes of the SSS group. The different evolutionary patterns of coding and non-coding regions in the mitochondrial and nuclear genomes may be related to the origin of the aerobic fermentation lifestyle in this group. Our analysis thus provides novel insights into the evolution of mitochondrial genomes.
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spelling pubmed-55589582017-08-25 Mitochondrial genome evolution in the Saccharomyces sensu stricto complex Ruan, Jiangxing Cheng, Jian Zhang, Tongcun Jiang, Huifeng PLoS One Research Article Exploring the evolutionary patterns of mitochondrial genomes is important for our understanding of the Saccharomyces sensu stricto (SSS) group, which is a model system for genomic evolution and ecological analysis. In this study, we first obtained the complete mitochondrial sequences of two important species, Saccharomyces mikatae and Saccharomyces kudriavzevii. We then compared the mitochondrial genomes in the SSS group with those of close relatives, and found that the non-coding regions evolved rapidly, including dramatic expansion of intergenic regions, fast evolution of introns and almost 20-fold higher rearrangement rates than those of the nuclear genomes. However, the coding regions, and especially the protein-coding genes, are more conserved than those in the nuclear genomes of the SSS group. The different evolutionary patterns of coding and non-coding regions in the mitochondrial and nuclear genomes may be related to the origin of the aerobic fermentation lifestyle in this group. Our analysis thus provides novel insights into the evolution of mitochondrial genomes. Public Library of Science 2017-08-16 /pmc/articles/PMC5558958/ /pubmed/28813471 http://dx.doi.org/10.1371/journal.pone.0183035 Text en © 2017 Ruan 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 (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Ruan, Jiangxing
Cheng, Jian
Zhang, Tongcun
Jiang, Huifeng
Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
title Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
title_full Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
title_fullStr Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
title_full_unstemmed Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
title_short Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
title_sort mitochondrial genome evolution in the saccharomyces sensu stricto complex
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5558958/
https://www.ncbi.nlm.nih.gov/pubmed/28813471
http://dx.doi.org/10.1371/journal.pone.0183035
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