Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Nature. 1997 Jun 12;387(6634):708-13.

Molecular evidence for an ancient duplication of the entire yeast genome.

Author information

  • 1Department of Genetics, University of Dublin, Trinity College, Ireland. khwolfe@tcd.ie

Abstract

Gene duplication is an important source of evolutionary novelty. Most duplications are of just a single gene, but Ohno proposed that whole-genome duplication (polyploidy) is an important evolutionary mechanism. Many duplicate genes have been found in Saccharomyces cerevisiae, and these often seem to be phenotypically redundant. Here we show that the arrangement of duplicated genes in the S. cerevisiae genome is consistent with Ohno's hypothesis. We propose a model in which this species is a degenerate tetraploid resulting from a whole-genome duplication that occurred after the divergence of Saccharomyces from Kluyveromyces. Only a small fraction of the genes were subsequently retained in duplicate (most were deleted), and gene order was rearranged by many reciprocal translocations between chromosomes. Protein pairs derived from this duplication event make up 13% of all yeast proteins, and include pairs of transcription factors, protein kinases, myosins, cyclins and pheromones. Tetraploidy may have facilitated the evolution of anaerobic fermentation in Saccharomyces.

PMID:
9192896
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Nature Publishing Group
    Loading ...
    Write to the Help Desk