Rna14p, a component of the yeast nuclear cleavage/polyadenylation factor I, is also localised in mitochondria

Mol Gen Genet. 2000 Jan;262(6):1103-12. doi: 10.1007/pl00008653.

Abstract

RNA14 was identified as a gene involved in premessenger RNA cleavage and polyadenylation. These processing steps take place in the nucleus, but the Rna14p protein is distributed in both the nucleus and the cytoplasm. By subcellular fractionation, we show here that the cytoplasmic fraction is localised in the mitochondria. In order to understand the role played by Rna14p in mitochondria, we have searched for new thermosensitive alleles of RNA14. We isolated thirteen new mutants. Some of them are deficient in mRNA cleavage and polyadenylation at the restrictive temperature - like the first mutant identified (rna14-1). However, others do not appear to be impaired in any of the steps in RNA metabolism investigated, nor do they appear to be involved in the replication or expression of mitochondrial DNA or in respiration. The localisation data strongly suggest that, besides an essential function in mRNA polyadenylation, the Rna14p protein has a non essential function in mitochondrial metabolism.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Base Sequence
  • Cell Nucleus / metabolism
  • DNA Primers / genetics
  • Fungal Proteins / genetics
  • Fungal Proteins / metabolism*
  • Genes, Fungal
  • Mitochondria / metabolism
  • Mutation
  • RNA Precursors / genetics
  • RNA Precursors / metabolism
  • RNA Splicing / genetics
  • RNA Stability / genetics
  • RNA, Fungal / genetics
  • RNA, Fungal / metabolism
  • RNA-Binding Proteins / genetics
  • RNA-Binding Proteins / metabolism*
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae / metabolism*
  • Saccharomyces cerevisiae Proteins*
  • Suppression, Genetic
  • Temperature
  • mRNA Cleavage and Polyadenylation Factors

Substances

  • DNA Primers
  • Fungal Proteins
  • RNA Precursors
  • RNA, Fungal
  • RNA-Binding Proteins
  • Saccharomyces cerevisiae Proteins
  • mRNA Cleavage and Polyadenylation Factors
  • RNA14 protein, S cerevisiae