ArticleGenome biology and evolution2014
Extreme features of the Galdieria sulphuraria organellar genomes: a consequence of polyextremophily?
Article in Genome biology and evolution, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.
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15 citing papers in PubMed, 40 citations in OpenAlex.
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- Recurrent evolutionary switches of mitochondrial cytochrome c maturation systems in Archaeplastida.Nature communications · 2024Article
- Extreme environments offer an unprecedented opportunity to understand microbial eukaryotic ecology, evolution, and genome biology.Nature communications · 2023Review
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- Occurrence, Evolution and Specificities of Iron-Sulfur Proteins and Maturation Factors in Chloroplasts from Algae.International journal of molecular sciences · 2021Review
- Potential causes and consequences of rapid mitochondrial genome evolution in thermoacidophilic Galdieria (Rhodophyta).BMC evolutionary biology · 2020Article
- Optimal Growth Temperature and Intergenic Distances in Bacteria, Archaea, and Plastids of Rhodophytic Branch.BioMed research international · 2020Article
- Complex analyses of inverted repeats in mitochondrial genomes revealed their importance and variability.Bioinformatics (Oxford, England) · 2018Article
- Evolutionary Dynamics of Cryptophyte Plastid Genomes.Genome biology and evolution · 2017Article
- Parallel evolution of highly conserved plastid genome architecture in red seaweeds and seed plants.BMC biology · 2016Article
- Reconstructing the complex evolutionary history of mobile plasmids in red algal genomes.Scientific reports · 2016Article
- Evolutionary history of phosphatidylinositol- 3-kinases: ancestral origin in eukaryotes and complex duplication patterns.BMC evolutionary biology · 2015Article
- Highly Conserved Mitochondrial Genomes among Multicellular Red Algae of the Florideophyceae.Genome biology and evolution · 2015Article
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Authors and funding
7 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Nuclear genome sequencing from extremophilic eukaryotes has revealed clues about the mechanisms of adaptation to extreme environments, but the functional consequences of extremophily on organellar genomes are unknown. To address this issue, we assembled the mitochondrial and plastid genomes from a polyextremophilic red alga, Galdieria sulphuraria strain 074 W, and performed a comparative genomic analysis with other red algae and more broadly across eukaryotes. The mitogenome is highly reduced in size and genetic content and exhibits the highest guanine-cytosine skew of any known genome and the fastest substitution rate among all red algae. The plastid genome contains a large number of intergenic stem-loop structures but is otherwise rather typical in size, structure, and content in comparison with other red algae. We suggest that these unique genomic modifications result not only from the harsh conditions in which Galdieria lives but also from its unusual capability to grow heterotrophically, endolithically, and in the dark. These conditions place additional mutational pressures on the mitogenome due to the increased reliance on the mitochondrion for energy production, whereas the decreased reliance on photosynthesis and the presence of numerous stem-loop structures may shield the plastome from similar genomic stress.
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