Summary
The 18S and 5S ribosomal RNA genes are separated by a 582-nucleotide-long spacer region in the Oenothera mitochondrial genome. The 5S rRNA gene is 7 bp shorter than the maize and 3 bp shorter than the wheat sequences due to a 4 bp deletion in a side arm of the secondary structure model. The 18S rRNA molecule can be folded analogously to the maize and wheat mitochondrial and Escherichia coli models for this rRNA. Most of the sequence variations between the wheat and Oenothera molecules are located in the variable domains identified for the wheat 18S rRNA.
The comparison of the 18S rRNA from the mitochondria of Oenothera as a representative of dicotyledonous plants with that of the monocotyledons wheat and maize provides an indication of the rate of diversity in higher plant mitochondrial genes and gives direct evidence for sequence rearrangements within the 18 S rRNA genes.
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Communicated by R.G. Hermann
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Brennicke, A., Möller, S. & Blanz, P.A. The 18S and 5S ribosomal RNA genes in Oenothera mitochondria: Sequence rearrangments in the 18S and 5S rRNA genes of higher plants. Mol Gen Genet 198, 404–410 (1985). https://doi.org/10.1007/BF00332930
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DOI: https://doi.org/10.1007/BF00332930