What does this research mean for the field?

Glutathione secreted by wild-type Schizosaccharomyces pombe acts as an exometabolite that rescues growth and morphological defects in neighboring mutant cells. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To identify the chemical basis of exometabolite-mediated interactions and assess how secreted molecules compensate for genetic defects in Schizosaccharomyces pombe.

September 15, 2026mSystemsOpen Access

Glutathione acts as an exometabolite that promotes growth recovery in fission yeast with defects in amino acid metabolism and cell polarity

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Authors

RYRyotaro Yoshizumi SMShunichi Miura HMHiroaki Matoba

Discussion

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Overview

Genome-wide screen reveals extracellular glutathione rescues growth and morphology defects in mutant fission yeast, suggesting primary exometabolites functionally shape microbial communities.

Key Points

To identify the chemical basis of exometabolite-mediated interactions and assess how secreted molecules compensate for genetic defects in Schizosaccharomyces pombe.
Screened 3,420 viable S. pombe gene deletion mutants in monoculture versus co-culture with wild-type cells on minimal medium to identify strains rescued by extracellular factors.
Partitioned wild-type culture supernatants into lipophilic and water-soluble fractions and identified active thiol-containing metabolites via liquid chromatography-mass spectrometry (LC-MS).
Identified 37 gene deletion mutants with monoculture growth defects that recovered growth near wild-type colonies, with both lipophilic and water-soluble fractions promoting rescue.
Identified glutathione (GSH) in wild-type supernatant by LC-MS, demonstrating it rescues growth across cysteine auxotrophs as a nutrient source.
Found that extracellular GSH rescues cell morphology defects in hob3Δ mutants lacking a BAR adaptor protein through a non-nutritional mechanism.

Cite This Study

Yoshizumi et al. (2026) studied this question.

synapsesocial.com/papers/6aa9134b9013453be30a113d https://doi.org/10.1128/msystems.00123-26

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September 15, 2026mSystemsOpen Access

Glutathione acts as an exometabolite that promotes growth recovery in fission yeast with defects in amino acid metabolism and cell polarity

View Full Paper

Ask AI

Bookmark

Authors

RYRyotaro Yoshizumi SMShunichi Miura HMHiroaki Matoba

Discussion

Member takes

Overview

Genome-wide screen reveals extracellular glutathione rescues growth and morphology defects in mutant fission yeast, suggesting primary exometabolites functionally shape microbial communities.

Key Points

To identify the chemical basis of exometabolite-mediated interactions and assess how secreted molecules compensate for genetic defects in Schizosaccharomyces pombe.
Screened 3,420 viable S. pombe gene deletion mutants in monoculture versus co-culture with wild-type cells on minimal medium to identify strains rescued by extracellular factors.
Partitioned wild-type culture supernatants into lipophilic and water-soluble fractions and identified active thiol-containing metabolites via liquid chromatography-mass spectrometry (LC-MS).
Identified 37 gene deletion mutants with monoculture growth defects that recovered growth near wild-type colonies, with both lipophilic and water-soluble fractions promoting rescue.
Identified glutathione (GSH) in wild-type supernatant by LC-MS, demonstrating it rescues growth across cysteine auxotrophs as a nutrient source.
Found that extracellular GSH rescues cell morphology defects in hob3Δ mutants lacking a BAR adaptor protein through a non-nutritional mechanism.

Cite This Study

Yoshizumi et al. (2026) studied this question.

synapsesocial.com/papers/6aa9134b9013453be30a113d https://doi.org/10.1128/msystems.00123-26

View Full Paper

Ask AI

Bookmark