| 1990 |
The VMA3 gene product (subunit c of vacuolar H+-ATPase, ortholog of ATP6V0C) is essential for vacuolar H+-ATPase activity and vacuolar acidification in vivo; deletion of VMA3 abolishes ATPase activity and the subunit c is indispensable for assembly of subunits a and b of the H+-ATPase complex. Loss of VMA3 also impairs vacuolar biogenesis, protein transport to the vacuole, and completely inhibits endocytosis. |
VMA3 gene disruption in S. cerevisiae, measurement of vacuolar ATPase activity, in vivo acidification assay, endocytosis assay with lucifer yellow CH, subunit assembly analysis |
The Journal of biological chemistry |
High |
2145283
|
| 2002 |
The ATP6V0C promoter contains four GC boxes and an Oct1-binding site occupied by Sp1 and Oct1 in vivo. Cooperative binding of Sp1 and Oct1 to the promoter is required for transcriptional activation by the topoisomerase II inhibitor TAS-103, while cisplatin regulates ATP6L expression post-transcriptionally via mRNA stability. Induction of V-ATPase expression acts as an anti-apoptotic defense. |
Genomic cloning, in vivo footprint analysis, promoter-reporter assays, site-directed mutagenesis of Oct1 site, electrophoretic mobility shift assay (EMSA), RT-PCR for mRNA stability |
The Journal of biological chemistry |
High |
12133827
|
| 2005 |
Knockdown of ATP6L (ATP6V0C) using siRNA in highly metastatic hepatocellular carcinoma cells inhibits proton secretion, intracellular pH recovery from acidification, reduces MMP-2 expression and gelatinase activity, suppresses invasion in vitro, and dramatically reduces tumor growth and metastasis in vivo in a xenograft mouse model. |
DNA vector-based siRNA stable transfection, intracellular pH measurement, Matrigel invasion assay, gelatin zymography, nude mouse xenograft implantation |
Cancer research |
High |
16061667
|
| 2006 |
ATP6V0C directly interacts with HIF-1α through the N-terminal end (amino acids 1-16) of HIF-1α, competing with Von Hippel-Lindau protein for HIF-1α binding. ATP6V0C overexpression increases HIF-1α levels in a gene dose-dependent manner, and bafilomycin A1 stimulates this interaction and causes co-translocation of ATP6V0C with HIF-1α from the cytoplasm to the nucleus. |
ATP6V0C knockdown by siRNA, overexpression, co-immunoprecipitation, confocal immunofluorescence microscopy, HIF-1α domain mapping |
Molecular pharmacology |
Medium |
17178925
|
| 2008 |
The E3 ubiquitin ligase RNF182 directly interacts with ATP6V0C (identified by yeast two-hybrid screening and confirmed by co-precipitation in vitro and in vivo) and targets ATP6V0C for degradation via the ubiquitin-proteasome pathway. |
Yeast two-hybrid screening, overexpression and co-precipitation (in vitro and in vivo), E3 ligase activity assay, proteasome degradation assay |
Molecular neurodegeneration |
Medium |
18298843
|
| 2009 |
Knockdown of ATP6L (ATP6V0C) in drug-resistant breast cancer cells (MCF-7/ADR) increases lysosomal pH and causes retention of anticancer drugs (doxorubicin, 5-fluorouracil, vincristine) in nuclei rather than sequestration in acidic lysosomes, sensitizing cells to chemotherapy. This identifies V-ATPase c subunit as a regulator of intracellular pH-dependent drug distribution. |
siRNA knockdown, qRT-PCR, Western blot, lysosomal pH measurement, drug distribution/nuclear retention assay, cytotoxicity assay |
Cancer letters |
Medium |
19299075
|
| 2013 |
In Candida albicans, VMA3 repression prevents V-ATPase assembly at the vacuolar membrane, reduces concanamycin A-sensitive ATPase activity and proton transport by >90%, alkalinizes the vacuolar lumen, impairs aspartyl protease and lipase secretion, and suppresses filamentation. V-ATPase-dependent filamentation defects are not rescued by overexpression of RIM8, MDS3, EFG1, CST20, or UME6, suggesting V-ATPase functions downstream or independently of these regulators. |
Conditional tetracycline-regulated promoter replacement, ATPase activity assay, proton transport assay, vacuolar pH measurement, vacuolar morphology analysis, secretion assays, genetic epistasis with filamentation regulators |
Eukaryotic cell |
High |
23913543
|
| 2014 |
ATP6V0C is the bafilomycin A1-binding subunit of vacuolar ATPase in neuronal cells. Knockdown of ATP6V0C reduces lysosomal acidity (LysoTracker staining), increases basal LC3-II levels, α-synuclein high molecular weight species, and APP C-terminal fragments, inhibits autophagic flux, and reduces neurite length. Enhanced LC3/LAMP-1 co-localization indicates the autophagic flux block occurs at the lysosomal degradation step, not at vesicular fusion. |
siRNA knockdown in differentiated SH-SY5Y cells, quantitative RT-PCR, LysoTracker Red staining, immunofluorescence (LC3/LAMP-1 co-localization), Western blot for LC3-II/α-synuclein/APP-CTF, neurite length measurement, propidium iodide viability assay |
PloS one |
High |
24695574
|
| 2017 |
Silencing of ATP6V0C in highly metastatic prostate cancer cells inhibits V-ATPase activity (~5-fold), decreases extracellular hydrogen ion concentration, reduces activation of secreted MMP-9 (~3.6-fold), and inhibits cell migration and invasion. ATP6V0C co-localizes with LASS2/TMSG1 at the plasma membrane, and silencing ATP6V0C reduces LASS2/TMSG1 expression, suggesting a feedback regulatory relationship. The invasion suppression is not LASS2/TMSG1-dependent. |
siRNA knockdown, V-ATPase activity assay, extracellular pH measurement, gelatin zymography (MMP-9 activation), Matrigel invasion assay, wound migration assay, confocal immunofluorescence co-localization |
Oncology reports |
Medium |
29138865
|
| 2020 |
ATP6V0C interacts with HIV-1 accessory protein Vpu (identified by yeast two-hybrid screening). ATP6V0C depletion by knockdown impairs Vpu-mediated tetherin degradation and results in defective HIV-1 release. ATP6V0C overexpression stabilizes tetherin expression and sequesters it in CD63/LAMP1-positive intracellular compartments. This effect is specific to ATP6V0C, as overexpression of ATP6V0C″ (another V-ATPase subunit) had no effect on tetherin. |
Yeast two-hybrid screening, siRNA knockdown in HeLa cells, overexpression, immunofluorescence localization, HIV-1 release assay, Western blot for tetherin |
The Journal of biological chemistry |
Medium |
32291285
|
| 2023 |
Heterozygous point variants in ATP6V0C impair V-ATPase function: functional analyses in S. cerevisiae showed reduced LysoSensor fluorescence (decreased vacuolar acidification) and reduced growth in CaCl2-containing media. In silico modelling indicated variants interfere with ATP6V0C–ATP6V0A subunit interactions during ATP hydrolysis. Knockdown of ATP6V0C in Drosophila increased duration of seizure-like behaviour, and expression of patient variants in C. elegans led to reduced growth, motor dysfunction, and reduced lifespan. |
Patient variant identification, yeast functional complementation assay (LysoSensor fluorescence, calcium sensitivity growth assay), in silico structural modelling, Drosophila knockdown seizure assay, C. elegans variant expression with behavioral/viability assays |
Brain : a journal of neurology |
High |
36074901
|
| 2024 |
TFEB directly binds the ATP6V0C promoter at a specific site to transcriptionally activate ATP6V0C expression, as demonstrated by CUT&Run-qPCR and luciferase reporter assay. ATP6V0C acts as a scaffold protein that mediates autophagosome-lysosome fusion by bridging with STX17 and VAMP8 (SNARE complex), independently of its role in lysosomal acidification/degradation. Loss of TFEB in renal fibrosis reduces ATP6V0C expression, impairing autophagic flux and causing tubular cell G2/M arrest. |
RNA-seq, CUT&Tag, CUT&Run-qPCR, luciferase reporter assay, co-immunoprecipitation (ATP6V0C with STX17 and VAMP8), AAV9-TFEB overexpression in UUO mouse model, autophagic flux assay |
International journal of biological sciences |
Medium |
38481802
|
| 2026 |
ATP6V0C and HIF-1α form a positive feedback loop in acute lung injury: ATP6V0C interacts with HIF-1α (confirmed by co-immunoprecipitation), HIF-1α transcriptionally regulates ATP6V0C expression, and ATP6V0C in turn promotes HIF-1α upregulation. Alveolar-specific ATP6V0C knockout mice show attenuated LPS-induced acute lung injury (reduced inflammation and epithelial apoptosis), and overexpression of ATP6V0C exacerbates ALI in a HIF-1α-dependent manner. |
Alveolar-specific conditional knockout (Atp6v0cAT2-KO), HIF-1α knockout (Hif1aAT2-KO), co-immunoprecipitation, transcriptomic analysis, AAV-mediated overexpression, LPS-induced ALI model |
American journal of respiratory cell and molecular biology |
High |
41738275
|
| 2026 |
In T. spiralis, the HRG-1/ATP6V0C complex is essential for heme acquisition by the parasite. Ts-ATP6V0C interacts with Ts-HRG-1 to form a functional complex required for heme transport. RNAi knockdown of Ts-ATP6V0C or inhibition by bafilomycin A1 impairs heme uptake, causes developmental arrest, and reduces larval burden in mouse hosts. |
Protein-protein interaction studies (HRG-1/ATP6V0C complex), RNAi knockdown of Ts-ATP6V0C, bafilomycin A1 inhibition, heme uptake assay, in vivo mouse infection model |
PLoS pathogens |
Medium |
41838682
|
| 2026 |
Atp6v0c transgene expression in retinal ganglion cells (via AAV2 intravitreal injection) promotes RGC survival and long-distance axon regeneration after optic nerve crush, comparable in efficacy to targeting Pten and Klf9. This identifies ATP6V0C as an axon regeneration-promoting factor, likely through support of lysosomal acidification and degradation of misfolded proteins in response to ER stress in injured neurons. |
AAV2-mediated Atp6v0c transgene expression, optic nerve crush model in rodents, RGC survival quantification, axon regeneration measurement |
Molecular therapy. Nucleic acids |
Medium |
42023031
|