NDLI: Genes and Processed Paralogs Co-exist in Plant Mitochondria

Content Provider	Springer Nature Link
Author	Cuenca, Argelia Petersen, Gitte Seberg, Ole Jahren, Anne Hoppe
Copyright Year	2012
Abstract	RNA-mediated gene duplication has been proposed to create processed paralogs in the plant mitochondrial genome. A processed paralog may retain signatures left by the maturation process of its RNA precursor, such as intron removal and no need of RNA editing. Whereas it is well documented that an RNA intermediary is involved in the transfer of mitochondrial genes to the nucleus, no direct evidence exists for insertion of processed paralogs in the mitochondria (i.e., processed and un-processed genes have never been found simultaneously in the mitochondrial genome). In this study, we sequenced a region of the mitochondrial gene nad1, and identified a number of taxa were two different copies of the region co-occur in the mitochondria. The two nad1 paralogs differed in their (a) presence or absence of a group II intron, and (b) number of edited sites. Thus, this work provides the first evidence of co-existence of processed paralogs and their precursors within the plant mitochondrial genome. In addition, mapping the presence/absence of the paralogs provides indirect evidence of RNA-mediated gene duplication as an essential process shaping the mitochondrial genome in plants.
Starting Page	158
Ending Page	169
Page Count	12
File Format	PDF
ISSN	00222844
Journal	Journal of Molecular Evolution
Volume Number	74
Issue Number	3-4
e-ISSN	14321432
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-04-07
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant mitochondria Processed paralogs RNA editing Mitochondrial intron nad1 Phylogenetic analysis Alismatales Monocotyledons Animal Genetics and Genomics Cell Biology Microbiology Plant Sciences Plant Genetics & Genomics Evolutionary Biology
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Ecology, Evolution, Behavior and Systematics

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