ArticleThe Journal of cell biology2025
Vacuoles provide the source membrane for TORC1-containing signaling endosomes.
Article in The Journal of cell biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- The A2357T substitution in the kinase domain of yeast Tor1 confers growth promoting TORC1 activity independent of Gtr1/2 and Pib2.Scientific reports · 2026Article
- Homeostatic Influence of Fig4 Outside of the Fab1-Vac14-Fig4 Complex in Saccharomyces cerevisiae.Molecular microbiology · 2025Article
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Authors and funding
2 authors.
Funding
Abstract
Organelle biogenesis is fundamental to eukaryotic cell biology. Yeast signaling endosomes were recently identified as a signaling platform for the evolutionarily conserved Target of Rapamycin Complex 1 (TORC1) kinase complex. Despite the importance of signaling endosomes for TORC1-mediated control of cellular metabolism, how this organelle is generated has been a mystery. Here, we developed a system to induce synchronized de novo formation of signaling endosomes, enabling real-time monitoring of their biogenesis. Using this system, we identify vacuoles as a membrane source for newly formed signaling endosomes. Membrane supply from vacuoles is mediated by the CROP membrane-cutting complex, consisting of Atg18 PROPPIN and retromer subunits. The formation of signaling endosomes requires TORC1 activity, suggestive of a tightly regulated process. This study unveiled the first mechanistic principles and molecular participants of signaling endosome biogenesis.
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