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pH homeostasis in yeast; the phosphate perspective
Elja Eskes1, Marie-Anne Deprez1, Tobias Wilms1
1Functional Biology, KU Leuven, Kasteelpark Arenberg 31 box 2433, 3001, Heverlee, Belgium.
Current Genetics
|September 1, 2017
Summary
Budding yeast
Area of Science:
- Molecular biology
- Cellular physiology
- Yeast research
Background:
- Nutrient signaling pathways regulate growth and survival.
- pH homeostasis is crucial for cellular functions.
- Budding yeast Saccharomyces cerevisiae serves as a model organism.
Purpose of the Study:
- To elucidate molecular mechanisms linking nutrient signaling and pH homeostasis.
- To understand the role of phosphate metabolism in this interplay.
- To investigate feedback mechanisms from phosphate metabolism to nutrient signaling kinases.
Main Methods:
- Investigated central nutrient signaling kinases (PKA, TORC1, Sch9).
- Examined phosphate uptake, signaling, and intracellular distribution.
- Analyzed the role of polyphosphate and inositol pyrophosphate metabolism.
- Studied interactions with intra- and extracellular pH control.
Main Results:
- Nutrient signaling kinases are closely linked to pH homeostasis.
- Phosphate uptake and metabolism are dependent on proton gradients.
- Polyphosphate metabolism influences intracellular pH.
- Inositol pyrophosphates provide feedback to nutrient signaling kinases.
Conclusions:
- Phosphate metabolism is critical for the reciprocal regulation of nutrient signaling and pH homeostasis.
- This interplay impacts yeast growth and survival.
- Understanding these mechanisms offers insights into cellular regulation.
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