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  • Title: Structural analysis of mature and dicistronic transcripts from the 18 S and 5 S ribosomal RNA genes of maize mitochondria.
    Author: Maloney AP, Walbot V.
    Journal: J Mol Biol; 1990 Jun 20; 213(4):633-49. PubMed ID: 2359118.
    Abstract:
    Analysis of the 18 S and 5 S ribosomal RNA transcripts of maize mitochondria is described. The 5' and 3' ends of both mature rRNAs were defined by S1 nuclease protection analysis, which also showed that a small fraction of the total 18 S and 5 S rRNA population resides on common transcripts. The 5' termini of many of these RNAs are upstream from the mature 18 S 5' endpoint. Northern hybridization detected several high molecular weight RNAs that were homologous to the 5 S and 18 S genes and their flanking sequences. Because the two rRNAs share a number of transcripts, we propose that these genes are transcribed as one or more large dicistronic RNAs that are subsequently processed to mature ribosomal RNA molecules. A model for the processing of the large putative precursors is presented.
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