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Updated: Jun 30, 2026

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
Published on: August 12, 2019
A yeast recombination system recapitulates the length polymorphism of a microsatellite implicated in human social
Catie E Kean1, Elina A Radchenko1, Noah M Lindenbaum1
1Department of Biology, Tufts University, Medford, MA 02155, United States.
Abstract:
Arginine Vasopressin (AVP) modulates social and sexual behaviors in mammals through its receptor V1a. Differences in receptor expression and the resulting behavioral changes have been linked to population-level variation in the 5' flanking region of the AVPR1A gene, specifically, length polymorphism of the composite microsatellite RS3 ((CT)4TT(CT)n(GT)m). However, the source of this length variation is unknown. Here, using a genetically tractable system in Saccharomyces cerevisiae, we recapitulated the full spectrum of the RS3 length polymorphism observed in humans resulting from genetic recombination between two RS3 sequences. Our candidate gene analysis shows that transcription elevates the rate of these recombination events and implicates double-strand break repair via single-strand annealing.
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