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Title: 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
 [1];  [1];  [2];  [3];  [4];  [5];  [1];  [6]
  1. Univ. of British Columbia, Vancouver, BC (Canada)
  2. Hiroshima Univ., Higashi-Hiroshima (Japan)
  3. HudsonAlpha Genome Sequencing Center, Huntsville, AL (United States)
  4. Joint Genome Institute, Walnut Creek, CA (United States)
  5. Univ. of Nebraska, Lincoln, NE (United States)
  6. Univ. Paris-Sud (France)

Here, 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:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
Genomics Division; USDOE
OSTI ID:
1344788
Report Number(s):
LBNL-156329; ir:156329
Journal Information:
PLoS ONE, Vol. 6, Issue 8; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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