| 2016 |
EPG5 is a Rab7 effector recruited to late endosomes/lysosomes by direct interaction with Rab7 and the late endosomal/lysosomal R-SNARE VAMP7/8. EPG5 also binds LC3/LGG-1 and assembled STX17-SNAP29 Qabc SNARE complexes on autophagosomes, stabilizes and facilitates assembly of STX17-SNAP29-VAMP7/8 trans-SNARE complexes, and promotes STX17-SNAP29-VAMP7-mediated fusion of reconstituted proteoliposomes. Loss of EPG5 causes abnormal fusion of autophagosomes with various endocytic vesicles partly due to elevated STX17-SNAP25-VAMP8 complex assembly. |
Co-immunoprecipitation, pulldown assays, reconstituted proteoliposome fusion assay, C. elegans and mammalian loss-of-function genetics, SNARE complex assembly assays |
Molecular cell |
High |
27588602
|
| 2012 |
Loss-of-function mutations in EPG5 cause a severe block in autophagosomal clearance, resulting in accumulation of autophagic cargo in autophagosomes, establishing EPG5 as a key regulator of autolysosome formation. |
Exome sequencing of patient cohort; autophagosome clearance assay in patient muscle and fibroblasts (immunofluorescence, western blot for autophagy markers) |
Nature genetics |
High |
23222957
|
| 2013 |
Epg5 deficiency in mice blocks maturation of autophagosomes into degradative autolysosomes and also impairs endocytic trafficking and endocytic recycling, leading to selective degeneration of cortical layer 5 pyramidal neurons and spinal cord motor neurons. |
Epg5 knockout mouse model; autophagic flux assays, endocytic trafficking assays, immunohistochemistry, electron microscopy |
The Journal of cell biology |
High |
23479740 23674064
|
| 2021 |
Human EPG5 adopts an extended 'shepherd's staff' architecture and binds preferentially to members of the GABARAP subfamily of ATG8 proteins via tandem LIR motifs that exhibit differential affinities; LIR-GABARAP interaction is required for EPG5 recruitment to mitochondria during PINK1/Parkin-dependent mitophagy. |
Cryo-EM structure, biochemical binding assays, mitophagy recruitment experiments (live imaging/fractionation) |
Communications biology |
High |
33674710
|
| 2025 |
Cryo-EM structure of human EPG5 reveals helical bundles analogous to membrane tethering factors with a unique protruding thumb domain adjacent to tandem LIR motifs. NMR, molecular dynamics, and AlphaFold modeling show tandem LIR motifs bind only the canonical LIR docking site (LDS) on GABARAP without multivalent engagement; co-IP confirmed full-length EPG5-GABARAP interaction is mediated primarily by LIR1. The same binding mode is conserved in C. elegans EPG-5 with LGG-1 and LGG-2 (X-ray crystallography). |
Cryo-EM, NMR spectroscopy, molecular dynamics simulations, AlphaFold2 modeling, co-immunoprecipitation, X-ray crystallography, ITC affinity measurements, GST pulldown |
Autophagy |
High |
39809444
|
| 2019 |
The deubiquitinating enzyme USP8 binds to the coiled-coil domain of EPG5 and removes K63-linked ubiquitin chains from EPG5 at Lysine 252, leading to enhanced interaction between EPG5 and LC3, thereby maintaining autophagic flux in embryonic stem cells. |
Co-immunoprecipitation, ubiquitination assays, site-directed mutagenesis (K252), LC3 interaction assays, ESC autophagy flux assays |
Nature communications |
High |
30931944
|
| 2022 |
TGM2 binds SDC1 and transports it from the cell membrane to lysosomes after irradiation; TGM2 then binds LC3 through two LIR motifs, coordinating autophagosome-lysosome encounter as a prerequisite for lysosomal EPG5 to recognize LC3 and stabilize the STX17-SNAP29-VAMP8 SNARE complex assembly. |
Tandem mass tag proteomics, knockdown experiments, co-immunoprecipitation, autophagic flux assays (GFP-RFP-LC3), in vivo GBM mouse model |
Autophagy |
Medium |
35913916
|
| 2018 |
EPG5 is indispensable for transport of the TLR9 ligand CpG to the late endosomal-lysosomal compartment and for TLR9-initiated signaling essential for survival of human memory B cells and their differentiation into plasma cells. |
Loss-of-function analysis in Vici syndrome patient cells; CpG trafficking assays, TLR9 signaling assays, B cell survival/differentiation assays |
Autophagy |
Medium |
29130391
|
| 2021 |
During sepsis, EPG5-LC3 protein-protein interactions are significantly reduced in platelets via TLR4/LPS-dependent signaling, impairing autophagosome-lysosome fusion and causing accumulation of autophagosomes. |
Co-immunoprecipitation from septic patient platelets, proximity ligation assay, TEM, megakaryocyte model with LPS/TLR4 manipulation |
Autophagy |
Medium |
34689707
|
| 2022 |
EPG5 knockout blocks autophagic flux in granulosa cells, causing accumulation of WT1 transcription factor that would normally be degraded by autophagy; failure to degrade WT1 in antral follicular stage reduces steroidogenesis-related gene expression and disrupts granulosa cell differentiation, leading to primary ovarian insufficiency. |
Epg5 knockout mouse, single-cell RNA sequencing, autophagic flux assays, cycloheximide chase for WT1 stability, co-IP/interaction assays |
Autophagy |
Medium |
35786405
|
| 2016 |
Epg5 plays a role in lung macrophage physiology to limit innate immune inflammation; deletion of Epg5 leads to elevated baseline innate immune cellular and cytokine-based lung inflammation, as confirmed by bone marrow transplantation experiments showing the phenotype is macrophage-intrinsic. |
Epg5 knockout mouse, bone marrow transplantation, lung transcriptomics, cellular cytokine expression analysis |
Cell host & microbe |
Medium |
26764600
|
| 2025 |
In C. elegans, EPG-5 modulates TGFB/TGF-β and WNT signaling by controlling retrograde endocytic trafficking; in epg-5 mutants, TGFB receptor SMA-6 and WNT secretion factor MIG-14 are trapped in hybrid endosomal structures. EPG-5 loss causes defective RAB-5/RAB-7 and RAB-5/RAB-10 conversion leading to hybrid vesicle formation; defects are ameliorated by knockdown of HOPS complex components. |
C. elegans genetics, fluorescence microscopy of trafficking reporters, epistasis with HOPS complex knockdown, RAB conversion assays |
Autophagy |
Medium |
40152605
|
| 2025 |
In Drosophila fat cells, pre-fusion autophagosomes move toward the non-centrosomal MTOC via a dynein-dynactin complex regulated by Rab7 and its adaptor Epg5 (together with Rab39/ema); Epg5 loss-of-function impairs this MTOC-directed movement and reduces autophagosome-lysosome fusion efficiency. |
Loss-of-function genetic screen in Drosophila, live imaging of autophagosome positioning, motor manipulation experiments |
eLife |
Medium |
41147582
|
| 2026 |
In EPG5-deficient patient-derived fibroblasts and iPSC-derived cortical neurons, impaired mitophagy leads to mitochondrial bioenergetic dysfunction; physiological Ca2+ signals cause mitochondrial Ca2+ overload (attributed to MICU1 downregulation), mitochondrial depolarization, mtDNA release, and activation of the cGAS-STING innate immune pathway. These effects are reversed by inhibition of the mitochondrial permeability transition pore or the STING pathway. |
Patient-derived fibroblasts, iPSC-derived cortical neurons, mitophagy assays, mitochondrial membrane potential measurement, Ca2+ imaging, cGAS-STING pathway activation assays, pharmacological inhibition |
Nature communications |
Medium |
42191733
|
| 2025 |
EPG5 deficiency in mice leads to progressive dopaminergic neurodegeneration in the substantia nigra, and patient-derived fibroblasts show defects in PINK1-Parkin-dependent mitophagic clearance and α-synuclein overexpression, linking EPG5 to a cellular basis for parkinsonism. |
EPG5-deficient mouse model, patient-derived fibroblast mitophagy assays, α-synuclein immunostaining, PINK1-Parkin pathway assays |
Annals of neurology |
Medium |
40192014
|
| 2024 |
Proteotoxic stress due to impaired autophagic clearance from EPG5 loss correlates with and co-regulates seizure-like behaviors in Drosophila; the epileptogenesis is a direct consequence of proteotoxic stress and age-dependent neurodegeneration rather than an independent pathway. |
Drosophila epg5 loss-of-function, electrocorticography, behavioral seizure assays (DART), proteotoxic stress markers, correlation analysis |
Autophagy |
Medium |
39342484
|
| 2019 |
miR-150 directly represses EPG5, blocking autophagosome-lysosome fusion; EPG5 knockdown promotes NSCLC cell proliferation and recapitulates miR-150 overexpression effects, placing EPG5 downstream of c-myc/miR-150 in regulating autophagic flux. |
miR-150 target validation (luciferase reporter, EPG5 protein level), EPG5 knockdown, autophagic flux assays (GFP-LC3), in vitro and in vivo tumor growth assays |
Theranostics |
Medium |
31410206
|
| 2016 |
Epg5-deficient mice show accumulation of ubiquitin-positive inclusions and SQSTM1 aggregates in retinal cells with impaired autophagosome maturation, leading to unfolded protein response (UPR) activation and elevated DDIT3/CHOP and cleaved CASP3, resulting in apoptotic photoreceptor cell death recapitulating retinitis pigmentosa. |
Epg5 knockout mouse, immunofluorescence, western blot (UPR markers), photoreceptor function tests (ERG), cell counting in outer nuclear layer |
Autophagy |
Medium |
27715390
|