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

Glutathione acts as an exometabolite that promotes growth recovery in S. pombe mutants with defects in amino acid metabolism and cell morphology.

• Why it matters: Understanding how extracellular metabolites mediate microbial interactions can reveal mechanisms underlying community behavior and cellular adaptation, which are largely unexplored.
• What they did: A genome-wide screen of 3,420 viable gene deletion mutants identified 37 strains with growth defects that were rescued by wild-type exometabolites, including glutathione, which was detected via LC-MS.
• The result: Glutathione restored growth in most mutants and rescued cell morphology defects independently of nutrition, suggesting it influences cellular processes and shapes microbial community dynamics.