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Updated: Feb 24, 2026

Analysis of the Expression and Complexes Assembly of the Mitochondrial Respiratory Chain Proteins in the Fission Yeast Schizosaccharomyces pombe
Published on: May 2, 2025
Mitochondrial genome evolution in the Saccharomyces sensu stricto complex
Jiangxing Ruan1,2, Jian Cheng2, Tongcun Zhang1
1College of Biotechnology, Tianjin University of Science & Technology, Tianjin 300308, China.
Mitochondrial genomes in Saccharomyces sensu stricto (SSS) evolve rapidly, especially non-coding regions, while coding regions remain conserved. This study reveals unique evolutionary patterns in yeast mitochondrial DNA.
Area of Science:
- Evolutionary Biology
- Genomics
- Yeast Genetics
Background:
- The Saccharomyces sensu stricto (SSS) group is a key model for studying genomic evolution.
- Understanding mitochondrial genome evolution is crucial for yeast biology and ecology.
Purpose of the Study:
- To investigate the evolutionary patterns of mitochondrial genomes within the SSS group.
- To compare mitochondrial genome evolution with nuclear genome evolution in SSS yeasts.
Main Methods:
- Sequencing complete mitochondrial genomes of Saccharomyces mikatae and Saccharomyces kudriavzevii.
- Comparative analysis of mitochondrial genomes within the SSS group and related species.
Main Results:
- Non-coding regions, including intergenic regions and introns, showed rapid evolution and high rearrangement rates (20x nuclear).
- Protein-coding genes within mitochondrial genomes are more conserved than nuclear genes in the SSS group.
- Distinct evolutionary rates between coding and non-coding regions were observed.
Conclusions:
- The rapid evolution of non-coding mitochondrial DNA and conserved coding regions may be linked to the aerobic fermentation lifestyle of SSS yeasts.
- This research offers new insights into the evolutionary dynamics of mitochondrial genomes in Saccharomyces yeasts.
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