ArticlePlant molecular biology1991
The cytochrome oxidase II gene in mitochondria of the sugar-beet Beta vulgaris L.
Article in Plant molecular biology, 1991. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed, 17 citations in OpenAlex.
- Evolutionary origin of a plant mitochondrial group II intron from a reverse transcriptase/maturase-encoding ancestor.Journal of plant research · 2006Article
- Conserved sequence blocks 5' to start codons of plant mitochondrial genes.Plant molecular biology · 1992Article
- The sugar beet mitochondrial gene for the ATPase alpha-subunit: sequence, transcription and rearrangements in cytoplasmic male-sterile plants.Current geneticsArticle
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We have cloned and analyzed the sugar-beet mitochondrial gene for cytochrome oxidase subunit II (coxII). The sugar-beet and its deduced amino acid sequence were compared to its homologous coxII gene sequences from both monocot and dicot plants. It was found to be highly conserved (89-95%) compared to homologue in other plant species. The 780 bp coding sequence of the sugar beet coxII gene is interrupted at position 383 by a 1463 bp intron. This intron contains an additional 107 bp sequence that is not found in any of the plant coxII genes studied thus far. The structure of the intron suggests that a large intron existed in an ancestral coxII gene before monocots and dicots diverged in evolution. Three CGG codons in the sugar-beet coxII coding sequence align with conserved tryptophan residues in the homologous gene of other species, suggesting that RNA editing takes place also in sugar-beet mitochondria. In 13 out of 24 codons of coxII mRNA that were found to be edited in four other plants, the sugar-beet gene already utilizes the edited codons. This phenomenon may indicate that the mitochondrial genome in sugar-beet is phylogenetically more archaic relative to these plants. An additional sequence of 279 bp that is identical to the first exon of coxII was identified in the mtDNA of the sugar-beet. This 'pseudo-gene' is transcribed and its existence in the mitochondrial genome is unexplained.
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