Potential causes and consequences of rapid mitochondrial genome evolution in thermoacidophilicGaldieria(Rhodophyta) SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 2 time in Scopus
Title
Potential causes and consequences of rapid mitochondrial genome evolution in thermoacidophilicGaldieria(Rhodophyta)
Author(s)
Cho, C.H.; Park, S.I.; Ciniglia, C.; Yang, Eun Chan; Graf, L.; Bhattacharya, D.; Yoon, H.S.
KIOST Author(s)
Yang, Eun Chan(양은찬)
Publication Year
2020-09
Abstract
Background The Cyanidiophyceae is an early-diverged red algal class that thrives in extreme conditions around acidic hot springs. Although this lineage has been highlighted as a model for understanding the biology of extremophilic eukaryotes, little is known about the molecular evolution of their mitochondrial genomes (mitogenomes). Results To fill this knowledge gap, we sequenced five mitogenomes from representative clades of Cyanidiophyceae and identified two major groups, here referred to asGaldieria-type (G-type) andCyanidium-type (C-type).G-type mitogenomes exhibit the following three features: (i) reduction in genome size and gene inventory, (ii) evolution of unique protein properties including charge, hydropathy, stability, amino acid composition, and protein size, and (iii) distinctive GC-content and skewness of nucleotides. Based on GC-skew-associated characteristics, we postulate that unidirectional DNA replication may have resulted in the rapid evolution ofG-type mitogenomes. Conclusions The high divergence ofG-type mitogenomes was likely driven by natural selection in the multiple extreme environments thatGaldieria species inhabit combined with their highly flexible heterotrophic metabolism. We speculate that the interplay between mitogenome divergence and adaptation may help explain the dominance ofGaldieria species in diverse extreme habitats.
ISSN
1471-2148
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/40245
DOI
10.1186/s12862-020-01677-6
Bibliographic Citation
BMC EVOLUTIONARY BIOLOGY, v.20, no.1, pp.112, 2020
Publisher
BMC
Keywords
Cyanidiophyceae; Extremophile; Mitogenome evolution; Protein divergence; Mitochondrial DNA replication
Type
Article
Language
English
Document Type
Article
Publisher
BMC
Related Researcher
Research Interests

Algae,Systematics,Ecology,조류,계통,생태

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