Mitochondrial rps14 is a transcribed and edited pseudogene in Arabidopsis thaliana.

Abstract:

:We have isolated and analysed a 2 kb region of the mitochondrial genome of Arabidopsis thaliana (Columbia) showing a high level of nucleotide identity with the mitochondrial (mt) rps14 small-subunit ribosomal protein gene from Oenothera berteriana and Vicia faba, as well as with an open reading frame (ORF) located upstream of the nad3 locus in O. berteriana. The rps14 locus is present as a single copy in the A. thaliana mt genome and has a translational stop codon located near the initiation codon, as well as a deletion of one nucleotide that disturbs the coding sequence. The cloning and sequencing of nine amplified mt rps14 cDNAs clearly demonstrated that this gene is transcribed and that the mRNA precursors are edited at three positions, all involving C-to-U conversions. No editing events changing the stop codon and restoring the correct coding sequence were witnessed within the 9 individual cDNA clones. Therefore, we conclude that the single rps14 sequence of the mitochondrial genome from A. thaliana is in fact a pseudogene that is transcribed and edited but not translated.

journal_name

Plant Mol Biol

journal_title

Plant molecular biology

authors

Aubert D,Bisanz-Seyer C,Herzog M

doi

10.1007/BF00028903

subject

Has Abstract

pub_date

1992-12-01 00:00:00

pages

1169-74

issue

6

eissn

0167-4412

issn

1573-5028

journal_volume

20

pub_type

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