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The GC-Rich Mitochondrial and Plastid Genomes of the Green Alga Coccomyxa Give Insight into the Evolution of Organelle DNA Nucleotide Landscape

Journal Article · · PLoS ONE
Most of the available mitochondrial and plastid genome sequences are biased towards adenine and thymine (AT) over guanine and cytosine (GC). Examples of GC-rich organelle DNAs are limited to a small but eclectic list of species, including certain green algae. Here, to gain insight in the evolution of organelle nucleotide landscape, we present the GC-rich mitochondrial and plastid DNAs from the trebouxiophyte green alga Coccomyxa sp. C-169. We compare these sequences with other GC-rich organelle DNAs and argue that the forces biasing them towards G and C are nonadaptive and linked to the metabolic and/or life history features of this species. The Coccomyxa organelle genomes are also used for phylogenetic analyses, which highlight the complexities in trying to resolve the interrelationships among the core chlorophyte green algae, but ultimately favour a sister relationship between the Ulvophyceae and Chlorophyceae, with the Trebouxiophyceae branching at the base of the chlorophyte crown.
Research Organization:
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC02-05CH11231
OSTI ID:
1165994
Report Number(s):
LBNL-6844E
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 8 Vol. 6; ISSN 1932-6203
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English

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Evolution of organellar genes of chlorophyte algae: Relevance to phylogenetic inference journal May 2019
Dynamic Evolution of the Chloroplast Genome in the Green Algal Classes Pedinophyceae and Trebouxiophyceae journal July 2015
Proposal of a new nomenclature for introns in protein-coding genes in fungal mitogenomes journal October 2019
Auxenochlorella protothecoides and Prototheca wickerhamii plastid genome sequences give insight into the origins of non-photosynthetic algae journal September 2015
Complete Mitochondrial and Plastid Genomes of the Green Microalga Trebouxiophyceae sp. Strain MX-AZ01 Isolated from a Highly Acidic Geothermal Lake journal October 2012
Evolution of the Chlorophyta: Insights from chloroplast phylogenomic analyses: Chloroplast phylogenomics of the Chlorophyta journal May 2017
Chloroplast phylogenomic analysis resolves deep-level relationships within the green algal class Trebouxiophyceae journal October 2014
Updating Our View of Organelle Genome Nucleotide Landscape journal January 2012
Mitochondrial genomes of the green macroalga Ulva pertusa (Ulvophyceae, Chlorophyta): novel insights into the evolution of mitogenomes in the Ulvophyceae journal July 2017
The Complete Chloroplast and Mitochondrial Genomes of the Green Macroalga Ulva sp. UNA00071828 (Ulvophyceae, Chlorophyta) journal April 2015
The genome of the polar eukaryotic microalga Coccomyxa subellipsoidea reveals traits of cold adaptation journal January 2012
Strategies for complete plastid genome sequencing journal November 2016
Horizontal Transfer of Entire Genomes via Mitochondrial Fusion in the Angiosperm Amborella journal December 2013
Plastid Genome-Based Phylogeny Pinpointed the Origin of the Green-Colored Plastid in the Dinoflagellate Lepidodinium chlorophorum journal April 2015
Plastid and mitochondrion genomic sequences from Arctic Chlorella sp. ArM0029B journal January 2014
A siphonous macroalgal genome suggests convergent functions of homeobox genes in algae and land plants journal March 2019
The inflated mitochondrial genomes of siphonous green algae reflect processes driving expansion of noncoding DNA and proliferation of introns journal January 2020
The mitochondrial genome of the arbuscular mycorrhizal fungus Gigaspora margarita reveals two unsuspected trans -splicing events of group I introns journal February 2012
Unexpectedly Streamlined Mitochondrial Genome of the Euglenozoan Euglena gracilis journal November 2015

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