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Genes 2017, 8(12), 395; doi:10.3390/genes8120395

Comparative Analysis of Four Calypogeia Species Revealed Unexpected Change in Evolutionarily-Stable Liverwort Mitogenomes

1
Department of Botany and Nature Protection, University of Warmia and Mazury in Olsztyn, Plac Łódzki 1, 10-727 Olsztyn, Poland
2
Department of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614 Poznań, Poland
*
Author to whom correspondence should be addressed.
Received: 11 October 2017 / Revised: 8 December 2017 / Accepted: 12 December 2017 / Published: 19 December 2017
(This article belongs to the Section Plant Genetics and Genomics)
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Abstract

Liverwort mitogenomes are considered to be evolutionarily stable. A comparative analysis of four Calypogeia species revealed differences compared to previously sequenced liverwort mitogenomes. Such differences involve unexpected structural changes in the two genes, cox1 and atp1, which have lost three and two introns, respectively. The group I introns in the cox1 gene are proposed to have been lost by two-step localized retroprocessing, whereas one-step retroprocessing could be responsible for the disappearance of the group II introns in the atp1 gene. These cases represent the first identified losses of introns in mitogenomes of leafy liverworts (Jungermanniopsida) contrasting the stability of mitochondrial gene order with certain changes in the gene content and intron set in liverworts. View Full-Text
Keywords: Calypogeia; editing sites; group I and II introns; intron loss; liverwort mitogenome; retroprocessing Calypogeia; editing sites; group I and II introns; intron loss; liverwort mitogenome; retroprocessing
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Ślipiko, M.; Myszczyński, K.; Buczkowska-Chmielewska, K.; Bączkiewicz, A.; Szczecińska, M.; Sawicki, J. Comparative Analysis of Four Calypogeia Species Revealed Unexpected Change in Evolutionarily-Stable Liverwort Mitogenomes. Genes 2017, 8, 395.

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