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Selection-induced mutations occur in yeast.

B G Hall1

  • 1Department of Biology, University of Rochester, NY 14627.

Proceedings of the National Academy of Sciences of the United States of America
|May 15, 1992
PubMed
Summary
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Selection-induced mutations, a direct response to environmental stress, were observed in non-dividing yeast cells. This study demonstrates their occurrence in Saccharomyces cerevisiae, a eukaryotic organism.

Area of Science:

  • Molecular Biology
  • Genetics
  • Microbiology

Background:

  • Selection-induced mutations are nonrandom genetic alterations.
  • These mutations arise in response to specific environmental challenges.
  • Previously observed in bacteria (Escherichia coli), their presence in eukaryotes was unconfirmed.

Purpose of the Study:

  • To investigate the occurrence of selection-induced mutations in a eukaryotic organism.
  • To determine if Saccharomyces cerevisiae exhibits selection-induced mutations.

Main Methods:

  • Utilizing the HIS4 locus in Saccharomyces cerevisiae.
  • Applying conditions of intense and prolonged selection.
  • Observing mutations in non-dividing yeast cells.

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Main Results:

  • Selection-induced mutations were demonstrated at the HIS4 locus in Saccharomyces cerevisiae.
  • This provides the first evidence of selection-induced mutations in a eukaryotic organism.

Conclusions:

  • Saccharomyces cerevisiae exhibits selection-induced mutations.
  • This finding expands the understanding of mutation mechanisms in eukaryotes.