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Plant Molecular Biology

, Volume 31, Issue 4, pp 937–943 | Cite as

The rpl5-rps 14-cob gene arrangement in Solanum tuberosum: rps14 is a transcribed and unedited pseudogene

  • Verónica Quiñones
  • Silvana Zanlungo
  • Alejandra Moenne
  • Isabel Gómez
  • Loreto Holuigue
  • Simon Litvak
  • Xavier Jordana
Short Communication

Abstract

The L5 ribosomal protein gene (rpl5) and a S14 ribosomal protein pseudogene were identified by sequence analysis in the potato mitochondrial genome. The two genes are separated by one nucleotide and are found upstream of the apocytochrome b gene (cob), an arrangement conserved also in Arabidopsis and Brassica. The rpl5 gene has an intact open reading frame while the rpsl4 locus is disrupted by a five nucleotide duplication that introduces a frameshift in the reading frame. Editing of rpl5 and pseudorps14 cotranscripts has been studied by cDNA sequence analysis. Eight C residues are edited into U in the rpl5 coding region, resulting in eight amino acid changes that increase the homology between potato and other RPL5 polypeptides. Interestingly, the rps14 pseudogene sequence is not edited at any nucleotide position.

Key words

apocytochrome b gene plant mitochondria potato RNA editing rpl5 gene rpsl4 pseudogene 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Verónica Quiñones
    • 1
  • Silvana Zanlungo
    • 1
  • Alejandra Moenne
    • 1
  • Isabel Gómez
    • 1
  • Loreto Holuigue
    • 1
  • Simon Litvak
    • 2
  • Xavier Jordana
    • 1
  1. 1.Departamento de Biología Celular y Molecular, Facultad de Ciencias BiológicasP. Universidad Católica de ChileSantiagoChile
  2. 2.Institut de Biochimie et Génétique CellulairesC.N.R.S.BordeauxFrance

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