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Temporal Quantification of MAPK Induced Expression in Single Yeast Cells
07:59

Temporal Quantification of MAPK Induced Expression in Single Yeast Cells

Published on: October 4, 2013

The fission yeast stress MAPK cascade regulates the pmp3+ gene that encodes a highly conserved plasma membrane

Ling-yu Wang1, Kazuhiro Shiozaki

  • 1Section of Microbiology, College of Biological Sciences, University of California, One Shields Avenue, Davis, CA 95616, USA.

FEBS Letters
|April 11, 2006
PubMed

Insights

Stress-activated MAPK signaling in yeast regulates the expression of the Pmp3 membrane protein. This pathway is vital for cellular adaptation and resistance to antibiotics like hygromycin B.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Stress-activated mitogen-activated protein kinases (MAPK) are essential for eukaryotic cells to adapt to environmental changes.
  • These signaling pathways regulate gene expression in response to stress.
  • The Pmp3 protein is a small membrane protein involved in modulating plasma membrane potential.

Purpose of the Study:

  • To investigate the role of Spc1/Sty1 MAPK and Atf1 transcription factor in regulating Pmp3 gene expression in Schizosaccharomyces pombe.
  • To determine the function of Pmp3 in cellular stress response and antibiotic resistance.

Main Methods:

  • Gene expression analysis in fission yeast.
  • Construction and analysis of null mutants for pmp3, spc1, and atf1.
  • Phenotypic analysis of mutant strains, including sensitivity to hygromycin B.

Main Results:

  • Spc1/Sty1 MAPK and Atf1 transcription factor were found to regulate the stress-induced expression of Pmp3 in fission yeast.
  • pmp3, spc1, and atf1 null mutants exhibited hypersensitivity to the cationic antibiotic hygromycin B.
  • The findings suggest a conserved role for MAPK in regulating Pmp3-like genes across eukaryotes.

Conclusions:

  • The Spc1/Sty1-Atf1 pathway is critical for the stress-induced expression of Pmp3 in yeast.
  • Pmp3 plays a role in cellular adaptation to stress, particularly in response to antibiotics.
  • This regulatory mechanism may be conserved in other eukaryotes, including plants.

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