Repression of meiotic crossing over by a centromere (CEN3) in Saccharomyces cerevisiae

  • Lambie E
  • Roeder G
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The location of the centromere of chromosome III (CEN3) of Saccharomyces cerevisiae has been altered by means of transformation. The frequency of meiotic crossing over in the CEN3-PGKl and LEU2-CEN3 intervals increases approximately 1.5- and fourfold, respectively, when CEN3 is repositioned at HIS4. The centromere-distal HIS4-LEU2 region experiences a three- to fivefold decrease in the frequency of meiotic exchange when CEN3 is repositioned at HIS4. The inhibition of meiotic crossing over is conferred by a 627-base-pair fragment of CEN3 DNA and is not dependent on the orientation of CEN3 relative to the rest of chromosome III.

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  • E. J. Lambie

  • G. S. Roeder

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