ore2, a mutation affecting proline biosynthesis in the yeast Saccharomyces cerevisiae, leads to a cdc phenotype

Mol Gen Genet. 1992 Aug;234(2):193-200. doi: 10.1007/BF00283839.

Abstract

We report here the isolation of temperature-sensitive mutants of the yeast Saccharomyces cerevisiae which exhibit cdc phenotypes. The recessive mutations defined four complementation groups, named ore1, ore2, ore3 and ore4. At the non-permissive temperature, strains bearing these mutations arrested in the G1 phase of the cell cycle. The wild-type allele of the gene altered in ore2 mutants was cloned. The nucleotide sequence of a fragment which can complement the mutation showed the presence of an open reading frame capable of encoding a protein with 286 amino acid residues. The deduced amino acid sequence showed 25% identity with that of the Escherichia coli delta 1-pyrroline-5-carboxylate reductase, an enzyme of the pathway for the biosynthesis of proline. The ore2 mutants, correspondingly, were found to be capable of growing at the non-permissive temperature on a synthetic medium supplemented with proline. In addition, the chromosomal location of the gene and its restriction map were compatible with those previously reported for the PRO3 gene which encodes the S. cerevisiae delta 1-pyrroline-5-carboxylate reductase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Base Sequence
  • Cloning, Molecular
  • Fungal Proteins / chemistry
  • Fungal Proteins / genetics*
  • Molecular Sequence Data
  • Mutagenesis / genetics
  • Proline / biosynthesis*
  • Proline / genetics
  • Pyrroline Carboxylate Reductases / chemistry
  • Pyrroline Carboxylate Reductases / genetics*
  • Restriction Mapping
  • Saccharomyces cerevisiae / enzymology
  • Saccharomyces cerevisiae / genetics*
  • Saccharomyces cerevisiae / metabolism
  • Saccharomyces cerevisiae Proteins*
  • Temperature
  • delta-1-Pyrroline-5-Carboxylate Reductase

Substances

  • Fungal Proteins
  • Saccharomyces cerevisiae Proteins
  • Proline
  • Pyrroline Carboxylate Reductases

Associated data

  • GENBANK/X57338