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Related Experiment Video

Updated: Sep 30, 2025

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
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Response to Cold: A Comparative Transcriptomic Analysis in Eight Cold-Adapted Yeasts.

Marcelo Baeza1,2, Sergio Zúñiga1, Vicente Peragallo1

  • 1Departamento de Ciencias Ecológicas, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.

Frontiers in Microbiology
|March 14, 2022
PubMed
Summary
This summary is machine-generated.

Cold-adapted yeasts from Antarctica exhibit diverse strategies for survival, with responses to low temperatures varying based on their optimal growth temperature. This impacts metabolic adjustments for dormancy or continued growth.

Keywords:
Antarctic yeastscodon biascold adaptationcold-adapted yeastsstress genestranscriptomes

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Area of Science:

  • Microbiology
  • Environmental Science
  • Genomics

Background:

  • Cold-adapted microorganisms inhabit extreme environments, employing strategies like cryoprotectant synthesis and membrane fluidity regulation to survive low temperatures.
  • Diverse survival strategies exist among cold-adapted microbes, influenced by environmental conditions and their inherent growth characteristics.

Purpose of the Study:

  • To investigate the transcriptomic responses of eight cold-adapted yeasts from King George Island to low temperatures.
  • To analyze gene expression, protein flexibility, and codon usage bias to understand differential cold adaptation strategies.

Main Methods:

  • Isolation and cultivation of eight cold-adapted yeasts from the sub-Antarctic region.
  • Transcriptomic analysis, including ORFeome assembly, gene prediction, functional annotation, and differential gene expression analysis.
  • Comparative analysis of protein flexibility and codon usage bias across different cellular functions.

Main Results:

  • Identified putative genes involved in stress response across all studied yeasts.
  • Found a correlation between the number of differentially expressed genes and the temperature variation experienced by each yeast.
  • Observed significant differences in cold response strategies among Antarctic yeasts, linked to their optimal growth temperature (OTG) rather than growth velocity.

Conclusions:

  • Yeast response to temperature change is primarily dictated by their optimal growth temperature (OTG).
  • Yeasts with higher OTG downregulate metabolism for dormancy, while those with lower OTG make minor adjustments to maintain growth at low temperatures.