The GC-rich mitochondrial and plastid genomes of the green alga Coccomyxa give insight into the evolution of organelle DNA nucleotide landscape
- Univ. of British Columbia, Vancouver, BC (Canada)
- Hiroshima Univ., Higashi-Hiroshima (Japan)
- HudsonAlpha Genome Sequencing Center, Huntsville, AL (United States)
- Joint Genome Institute, Walnut Creek, CA (United States)
- Univ. of Nebraska, Lincoln, NE (United States)
- 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
- Alternate ID(s):
- OSTI ID: 1154041
OSTI ID: 1165994
- Report Number(s):
- LBNL--156329; ir:156329
- Journal Information:
- PLoS ONE, Journal Name: PLoS ONE Journal Issue: 8 Vol. 6; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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