Cited by 39Fungal and yeast genetics researchPI3K/AKT/mTOR signaling in cancerMetabolism, Diabetes, and Cancer

TORC1 regulates the transcriptional response to glucose and developmental cycle via the Tap42-Sit4-Rrd1/2 pathway in Saccharomyces cerevisiae

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Alfatah, Mohammad, Wong, Jin Huei, Krishnan, Vidhya Gomathi, Lee, Yong Cheow, Sin, Quan Feng, Goh, Corinna Jie Hui, Kong, Kiat Whye, Lee, Wei Ting +3 more·2021·BMC Biology

Published version of a preprint

Abstract

Background: Target of Rapamycin Complex 1 (TORC1) is a highly conserved eukaryotic protein complex that couples the presence of growth factors and nutrients in the environment with cellular proliferation. TORC1 is primarily implicated in linking amino acid levels with cellular growth in yeast and mammals. Although glucose deprivation has been shown to cause TORC1 inactivation in yeast, the precise role of TORC1 in glucose signaling and the underlying mechanisms remain unclear. Results: We demonstrate that the presence of glucose in the growth medium is both necessary and sufficient for TORC1 activation. TORC1 activity increases upon addition of glucose to yeast cells growing in a non-fermentable carbon source. Conversely, shifting yeast cells from glucose to a non-fermentable carbon source reduces TORC1 activity. Analysis of transcriptomic data revealed that glucose and TORC1 co-regulate about 27% (1668/6004) of yeast genes. We demonstrate that TORC1 orchestrates the expression of glucose-responsive genes mainly via the Tap42-Sit4-Rrd1/2 pathway. To confirm TORC1’s function in glucose signaling, we tested its role in spore germination, a glucose-dependent developmental state transition in yeast. TORC1 regulates the glucose-responsive genes during spore germination and inhibition of TORC1 blocks spore germination. Conclusions: Our studies indicate that a regulatory loop that involves activation of TORC1 by glucose and regulation of glucose-responsive genes by TORC1, mediates nutritional control of growth and development in yeast.

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Authors
Alfatah, M., Wong, J. H., Krishnan, V. G., Lee, Y. C., Sin, Q. F., Goh, C. J. H., Kong, K. W., Lee, W. T., Lewis, J., Hoon, S., & Arumugam, P.
Affiliations
  • Bioinformatics Institute (SG)
  • Nanyang Technological University (SG)
Corresponding author
Arumugam, Prakash
Venue
BMC Biology
Published
2021-05-06
Volume
19
Issue
1
Pages
95-95
ISSN
1741-7007 (ISSN-L)
OpenAlex
W3159159567
Cited by
39
References
51
Citations by year
2026: 7 · 2025: 3 · 2024: 8 · 2023: 9 · 2022: 10 · 2021: 2
FWCI
2.28
Type
journal article
Language
en
Open access
Locations
  • BMC Biology (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • DR-NTU (Nanyang Technological University) (submittedVersion, cc-by)
Funders
Agency for Science, Technology and Research (BII)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
TORC1, glucose signaling, Sit4, spore germination, developmental cycle, non-fermentable carbon sources, nutrient sensing, transcriptional regulation, Saccharomyces cerevisiae
MeSH terms
Mechanistic Target of Rapamycin Complex 1, Carbon, Glucose, Saccharomyces cerevisiae, Peptidylprolyl Isomerase, Saccharomyces cerevisiae Proteins, Intracellular Signaling Peptides and Proteins, Adaptor Proteins, Signal Transducing, Protein Phosphatase 2

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