| 1996 |
HERC1 (p619) localizes to the cytosol and Golgi apparatus in a Brefeldin A-sensitive manner; its N-terminal RCC1-like domain (RLD1) stimulates guanine nucleotide exchange on ARF1 and Rab proteins but not on Ran or R-Ras2/TC21; its C-terminal RCC1-like domain interacts specifically with myristoylated ARF1. |
Subcellular fractionation, immunofluorescence, Brefeldin A treatment, in vitro GEF assay with purified recombinant domains |
The EMBO journal |
High |
8861955
|
| 2003 |
The HECT domain of HERC1 physically interacts with M2-type pyruvate kinase (M2-PK); this interaction does not induce M2-PK ubiquitination nor affect its enzymatic activity. |
Co-immunoprecipitation, pulldown with recombinant HECT domain, immunofluorescence colocalization |
FEBS letters |
Medium |
12650930
|
| 2004 |
HERC1 is recruited to ARF6-induced, aluminum fluoride-stimulated actin-rich surface protrusions in HeLa cells; HERC1 overexpression alone does not stimulate protrusion formation, indicating its recruitment is downstream of ARF6 activation rather than HERC1 acting as an ARF6-GEF in this context. A phosphoinositide-binding mechanism was proposed for translocation. |
Immunofluorescence of transfected HeLa cells treated with AlF4⁻, overexpression experiments |
FEBS letters |
Low |
14960311
|
| 2005 |
HERC1 RLD1 stimulates GDP release from ARF6 but inhibits GDP/GTP exchange under conditions where ARNO promotes it; HERC1's GEF activity requires phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2) bound to RLD1, and purified HERC1 contains PI(4,5)P2 co-purifying with RLD1. |
In vitro guanine nucleotide exchange assay with purified recombinant RLD1, lipid co-purification/binding assay |
FEBS letters |
High |
15642342
|
| 2006 |
HERC1 interacts with TSC2 and functions as an E3 ubiquitin ligase that destabilizes TSC2; TSC1 binding to TSC2 sterically excludes HERC1 from the TSC2 complex, thereby stabilizing TSC2. Disease-causing TSC2 mutations allow HERC1 binding even in the presence of TSC1. |
Co-immunoprecipitation, pulldown assays, protein stability assays with wild-type and mutant TSC2 |
The Journal of biological chemistry |
High |
16464865
|
| 2009 |
A missense mutation Gly483Glu in the N-terminal RCC1-like domain of HERC1 causes progressive Purkinje cell degeneration in tambaleante mice via extensive autophagy, accompanied by increased mutant HERC1 protein levels and decreased mTOR activity; transgenic rescue with wild-type Herc1 BAC or human HERC1 cDNA validated the causal role. |
Positional cloning, transgenic rescue, histology, Western blot for mTOR pathway components, autophagy markers |
PLoS genetics |
High |
20041218
|
| 2014 |
HPV5 E6 recruits HERC1 to ubiquitinate and degrade activated BAK (after UV-induced conformational change and phosphorylation); HERC1 physically interacts with activated BAK via a putative BH3-like domain in HERC1, and a specific lysine on BAK is required for E6-mediated proteolysis. |
siRNA functional screen, co-immunoprecipitation in E6-expressing UV-treated cells, site-directed mutagenesis of BAK lysine residue, domain analysis |
International journal of cancer |
High |
25408501
|
| 2015 |
HERC1 E3 ubiquitin ligase is required for normal neuromuscular junction morphology and evoked neurotransmitter release; the tambaleante HERC1 mutation reduces motor end-plate area and impairs presynaptic vesicle release before cerebellar degeneration occurs. |
Electrophysiology (evoked neurotransmitter release), morphometry of motor end-plates, in vivo motor function assays in tambaleante mice |
Cellular and molecular life sciences : CMLS |
Medium |
25746226
|
| 2018 |
HERC1 controls C-RAF protein stability by promoting its K48-linked polyubiquitination and proteasomal degradation; HERC1 directly interacts with C-RAF as shown by Co-IP and pulldown; in vitro ubiquitylation assay confirms C-RAF is a direct substrate of HERC1. HERC1 knockdown increases ERK phosphorylation and cell proliferation via C-RAF stabilization. |
Co-immunoprecipitation, pulldown, confocal microscopy, in vitro ubiquitylation assay, pharmacological RAF inhibitors, siRNA, K48-linkage-specific ubiquitin detection |
Oncotarget |
High |
30140388
|
| 2018 |
HERC1 mutation in tambaleante mice causes compact myelin damage (tomacula, hypermyelination foci) in motor axons, delays action potential propagation, and alters terminal Schwann cells at the NMJ, associated with increased phospho-Akt2 in sciatic nerve. |
Electrophysiology (nerve conduction velocity), electron microscopy, immunohistochemistry, Western blot for pAkt2 in sciatic nerve of tambaleante mice |
Molecular neurobiology |
Medium |
29603094
|
| 2020 |
HERC1 regulates cell migration through the MKK3/p38 pathway in a RAF-dependent manner: HERC1 ubiquitylates C-RAF for proteasomal degradation; C-RAF stabilization then increases MKK3 mRNA levels, which activates p38 to drive migration. HERC1 knockdown induces C-RAF accumulation, MKK3 upregulation, and p38 phosphorylation. |
siRNA knockdown, in vitro ubiquitylation assay, RAF pharmacological inhibitors, qRT-PCR for MKK3 mRNA, migration assays, Western blot for p38 phosphorylation |
Scientific reports |
High |
31965002
|
| 2020 |
HERC1 mutation (gain-of-function, Arg4691Pro in HECT domain) causes mTORC1 hyperactivation and failure to suppress mTORC1 during nutrient starvation (catabolic state), with abnormally high S6K1 phosphorylation and reduced autophagy in patient fibroblasts. |
Patient fibroblast functional assay under nutrient starvation, Western blot for pS6K1, autophagy markers (LC3, p62) |
Molecular genetics and metabolism |
Medium |
32921582
|
| 2020 |
HERC1 mutation in tambaleante hippocampal neurons reduces synaptic vesicle number, decreases active zone size, reduces clathrin immunoreactivity, and increases endosomes and autophagosomes at presynaptic endings, demonstrating HERC1's role in presynaptic membrane dynamics. |
Transmission electron microscopy, FM1-43 destaining assay, immunocytochemistry in cultured hippocampal neurons from tambaleante mice |
Scientific reports |
Medium |
32694577
|
| 2021 |
HERC1 physically interacts with BCR-ABL1 fusion protein in CML cells and is directly tyrosine-phosphorylated by ABL kinase. |
Co-immunoprecipitation, phosphorylation assay in CML cell lines |
Cancers |
Low |
33477751
|
| 2023 |
HERC1 regulates osteoblastogenesis and osteoclastogenesis; its depletion increases C-RAF levels and phosphorylated ERK and p38 during osteogenic differentiation of mesenchymal stem cells, and Herc1-knockout mice develop osteopenia with increased osteoclast numbers in young females and elevated Rankl/Opg ratio in osteocytes. |
Herc1-knockout mouse model, osteogenic differentiation of MSCs, Western blot for C-RAF/pERK/pp38, bone histomorphometry, RANKL/OPG gene expression |
Cell death & disease |
Medium |
36635269
|
| 2024 |
HERC1 ubiquitinates and degrades NCOA4 (a cargo receptor for ferritinophagy); targeting the HERC1-NCOA4 axis during photodynamic therapy activates ferroptosis in osteosarcoma cells. NRF2 is identified as a potential upstream regulator of this axis. |
Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, cell death assays in osteosarcoma cell lines |
Redox biology |
Medium |
39216271
|
| 2024 |
HERC1 ubiquitinates deoxycytidine kinase (dCK) for degradation in AML cells; loss of HERC1 enhances Ara-C (cytarabine)-induced cell death by compromising cell cycle progression. This was identified by genome-wide CRISPR pharmacogenomic screening and validated by proteomic analysis. |
Genome-wide CRISPR screen, in vitro and in vivo AML models, quantitative proteomics, validation of dCK as HERC1 substrate |
Blood advances |
Medium |
39093953
|
| 2025 |
HERC1 mutation in tambaleante mice does not alter proteasomal activity or specific UPS gene expression in brain or muscle tissue; proteasome inhibition with MG-132 does not affect evoked neurotransmitter release, whereas autophagy inhibition with wortmannin impairs it. HERC1 mutation increases p62 expression in muscle and alters clathrin and synaptophysin levels, indicating HERC1 regulates autophagy and vesicular recycling but not proteasomal function at the NMJ. |
Proteasome activity assay, MG-132 and wortmannin pharmacology at the NMJ, Western blot for p62/clathrin/synaptophysin in tambaleante mice |
International journal of molecular sciences |
Medium |
39859507
|
| 2025 |
HERC1 promotes ubiquitination and proteasomal degradation of KAT2A (a lysine acetyltransferase); KAT2A depletion inhibits lysine acetylation of PIK3CB, inactivating the PI3K/AKT axis and suppressing autophagy, thereby enhancing gemcitabine sensitivity in lung cancer cells. |
Co-immunoprecipitation, ubiquitination assay, overexpression/knockdown in gemcitabine-resistant lung cancer cells, xenograft model, Western blot for PI3K/AKT pathway |
Neoplasma |
Medium |
41567019
|
| 2025 |
HERC1 interacts with C-RAF, promotes its polyubiquitination, accelerates its proteasomal degradation, and promotes ferroptosis in lung adenocarcinoma cells; C-RAF overexpression partially rescues the ferroptosis phenotype induced by HERC1 overexpression. |
Co-immunoprecipitation, ubiquitination assay, protein stability assay, ferroptosis markers (ROS, MDA, GSH, Fe2+), CCK-8/LDH assays, rescue by C-RAF overexpression |
Cancer genetics |
Medium |
39983667
|