ArticleThe Journal of cell biology2024
The GTPase activating protein Gyp7 regulates Rab7/Ypt7 activity on late endosomes.
Article in The Journal of cell biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 11 citations in OpenAlex.
- Rab27: Molecular switch of tumor exosome secretion (Review).International journal of molecular medicine · 2026Review
- Endosomal maturation is controlled by the trimeric Bulli-Mon1-Ccz1 Rab7 GEF complex and the Rab5 GTPase-activating protein GAPsec.Journal of cell science · 2026Article
- The cytokinesis regulator RacGAP1 is a Rac1-specific GAP on membranes.Protein science : a publication of the Protein Society · 2026Article
- Vacuoles provide the source membrane for TORC1-containing signaling endosomes.The Journal of cell biology · 2025Article
- Any1 is a phospholipid scramblase involved in endosome biogenesis.The Journal of cell biology · 2025Article
Corrections and comments
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Authors and funding
13 authors at 5 institutions in 4 countries.
Funding
Abstract
Organelles of the endomembrane system contain Rab GTPases as identity markers. Their localization is determined by guanine nucleotide exchange factors (GEFs) and GTPase activating proteins (GAPs). It remains largely unclear how these regulators are specifically targeted to organelles and how their activity is regulated. Here, we focus on the GAP Gyp7, which acts on the Rab7-like Ypt7 protein in yeast, and surprisingly observe the protein exclusively in puncta proximal to the vacuole. Mistargeting of Gyp7 to the vacuole strongly affects vacuole morphology, suggesting that endosomal localization is needed for function. In agreement, efficient endolysosomal transport requires Gyp7. In vitro assays reveal that Gyp7 requires a distinct lipid environment for membrane binding and activity. Overexpression of Gyp7 concentrates Ypt7 in late endosomes and results in resistance to rapamycin, an inhibitor of the target of rapamycin complex 1 (TORC1), suggesting that these late endosomes are signaling endosomes. We postulate that Gyp7 is part of regulatory machinery involved in late endosome function.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.