Evidence for transitional stages in the evolution of euglenid group II introns and twintrons in the Monomorphina aenigmatica Plastid Genome
Evidence for transitional stages in the evolution of euglenid group II introns and twintrons in the Monomorphina aenigmatica Plastid Genome
Photosynthetic euglenids acquired their plastid by secondary endosymbiosis of a prasinophyte-like green alga. But unlike its prasinophyte counterparts, the plastid genome of the euglenid Euglena gracilis is riddled with introns that interrupt almost every protein-encoding gene. The atypical group II introns and twintrons (introns-within-introns) found in the E. gracilis plastid have been hypothesized to have been acquired late in the evolution of euglenids, implying that massive numbers of introns may be lacking in other taxa. This late emergence was recently corroborated by the plastid genome sequences of the two basal euglenids, Eutreptiella gymnastica and Eutreptia viridis, which were found to contain fewer introns.
Pombert, Jean-Francois
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James, Erick R.
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Janouskovec, Jan
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Keeling, Patrick J.
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31 December 2012
Pombert, Jean-Francois
9c69ddd8-9562-4666-83d3-299fc0b79cb3
James, Erick R.
b6b754b7-3e0e-4f59-9878-1b15093c276d
Janouskovec, Jan
fbaa4a5d-872e-465b-b2c3-bb35df455cc6
Keeling, Patrick J.
fd51c2ef-1daa-442d-b186-71001aa7ca7d
Pombert, Jean-Francois, James, Erick R., Janouskovec, Jan and Keeling, Patrick J.
(2012)
Evidence for transitional stages in the evolution of euglenid group II introns and twintrons in the Monomorphina aenigmatica Plastid Genome.
PLoS ONE, 7 (12).
(doi:10.1371/JOURNAL.PONE.0053433).
Abstract
Photosynthetic euglenids acquired their plastid by secondary endosymbiosis of a prasinophyte-like green alga. But unlike its prasinophyte counterparts, the plastid genome of the euglenid Euglena gracilis is riddled with introns that interrupt almost every protein-encoding gene. The atypical group II introns and twintrons (introns-within-introns) found in the E. gracilis plastid have been hypothesized to have been acquired late in the evolution of euglenids, implying that massive numbers of introns may be lacking in other taxa. This late emergence was recently corroborated by the plastid genome sequences of the two basal euglenids, Eutreptiella gymnastica and Eutreptia viridis, which were found to contain fewer introns.
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Accepted/In Press date: 28 November 2012
Published date: 31 December 2012
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Copyright: 2012 Pombert et al
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Local EPrints ID: 467292
URI: http://eprints.soton.ac.uk/id/eprint/467292
ISSN: 1932-6203
PURE UUID: 108e7e35-7ef5-41e0-81df-cffa3aa2cc9c
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Date deposited: 05 Jul 2022 16:47
Last modified: 17 Mar 2024 04:11
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Author:
Jean-Francois Pombert
Author:
Erick R. James
Author:
Jan Janouskovec
Author:
Patrick J. Keeling
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