ArticleThe Journal of cell biology2022
TBC1D18 is a Rab5-GAP that coordinates endosome maturation together with Mon1.
Article in The Journal of cell biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 35 citations in OpenAlex.
- 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
- Lipid turnover and GEF recruitment collectively determine Rab5 recruitment and activation during the first step of early endosome formation.Nature communications · 2026Article
- Review
- A proximity map of RAB GTPases delineates roles for RAB14 in EARP complex and UHRF1BP1 endosomal recruitments.Communications biology · 2025Article
- TBC1D22B Regulates ER-to-Golgi Trafficking via RAB1B Inactivation and Promotes Oncogenic Programs in Breast Cancer.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Increased Neuronal Expression of the Early Endosomal Adaptor APPL1 Replicates Alzheimer's Disease-Related Endosomal and Synaptic Dysfunction with Cholinergic Neurodegeneration.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Article
- ESCRTing the RABs through conversion.Biochemical Society transactions · 2025Review
- Heterogeneity of late endosome/lysosomes shown by multiplexed DNA-PAINT imaging.The Journal of cell biology · 2025Article
- The space-time continuum in neurological disorders of the autophagosome-lysosome fusion machinery.Autophagy reports · 2025Review
- An update on autophagy disorders.Journal of inherited metabolic disease · 2025Review
- Spatiotemporal recruitment of the ubiquitin-specific protease USP8 directs endosome maturation.eLife · 2024Article
- Structure of the metazoan Rab7 GEF complex Mon1-Ccz1-Bulli.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Proteomics analysis of methionine enkephalin upregulated macrophages against infection by the influenza-A virus.Proteome science · 2023Article
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Rab5 and Rab7 are known to regulate endosome maturation, and a Rab5-to-Rab7 conversion mediated by a Rab7 activator, Mon1-Ccz1, is essential for progression of the maturation process. However, the importance and mechanism of Rab5 inactivation during endosome maturation are poorly understood. Here, we report a novel Rab5-GAP, TBC1D18, which is associated with Mon1 and mediates endosome maturation. We found that increased active Rab5 (Rab5 hyperactivation) in addition to reduced active Rab7 (Rab7 inactivation) occurs in the absence of Mon1. We present evidence showing that the severe defects in endosome maturation in Mon1-KO cells are attributable to Rab5 hyperactivation rather than to Rab7 inactivation. We then identified TBC1D18 as a Rab5-GAP by comprehensive screening of TBC-domain-containing Rab-GAPs. Expression of TBC1D18 in Mon1-KO cells rescued the defects in endosome maturation, whereas its depletion attenuated endosome formation and degradation of endocytosed cargos. Moreover, TBC1D18 was found to be associated with Mon1, and it localized in close proximity to lysosomes in a Mon1-dependent manner.
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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 OpenQuestion graph.