| 1996 |
ZnT3 (SLC30A3) was cloned and predicted to have six transmembrane domains with 52% amino acid identity to ZnT2; antibodies against its C-terminal tail produced staining matching Timm's histochemical zinc reaction in synaptic vesicle-rich regions, leading to the proposal that ZnT3 transports zinc into synaptic vesicles. |
Molecular cloning, Northern blot, RT-PCR, in situ hybridization, immunohistochemistry |
Proceedings of the National Academy of Sciences of the United States of America |
High |
8962159
|
| 1997 |
ZnT3 protein was localized by electron microscopy to the membranes of all clear small round synaptic vesicles in mossy fiber boutons in mouse and monkey hippocampus, coinciding with Timm's-stainable zinc-containing vesicles. |
Electron microscopy immunolocalization, Timm's staining |
Proceedings of the National Academy of Sciences of the United States of America |
High |
9356509
|
| 1999 |
Targeted disruption of the ZnT3 gene completely eliminated histochemically reactive vesicular zinc from mouse brain without altering mossy fiber bouton ultrastructure; mice heterozygous for ZnT3 had proportionally reduced ZnT3 protein and intermediate vesicular zinc, establishing that ZnT3 is required for zinc transport into synaptic vesicles and that vesicular zinc concentration is determined by ZnT3 abundance. |
Gene knockout, Timm's staining, immunohistochemistry, Western blot, synchrotron X-ray fluorescence |
Proceedings of the National Academy of Sciences of the United States of America |
High |
9990090
|
| 2000 |
In ZnT3 knockout mice subjected to kainate seizures, zinc still accumulated in degenerating CA1/CA3 neurons (detectable by fluorescent zinc dye), demonstrating that the source of toxic zinc accumulation is not synaptic vesicles but other extracellular sources; CaEDTA injection into ventricles blocked this accumulation, indicating that extracellular zinc rise is the critical event. |
ZnT3 knockout model, kainate seizure induction, fluorescent zinc staining (MSO dye), CaEDTA chelation |
The Journal of neuroscience |
High |
10807937
|
| 2003 |
ZnT3 cytosolic tail interacted selectively with the AP-3 adaptor complex in cell-free assays; pharmacological or genetic disruption of AP-3 specifically reduced ZnT3 (but not synaptophysin) targeting to synaptic-like microvesicles, and immunoisolation confirmed ZnT3 and synaptophysin reside in distinct vesicle subpopulations. ZnT3 content in synaptic vesicles was reduced in AP-3-deficient (mocha) neurons. |
Cell-free AP-3 binding assay, pharmacological disruption of vesicle biogenesis, immunoisolation, mocha (AP-3 null) mouse brain biochemistry, immunofluorescence |
Molecular biology of the cell |
High |
14657250
|
| 2005 |
ZnT3 and the vesicular glutamate transporter Vglut1 are co-targeted to the same synaptic-like microvesicles via partly AP-3-dependent mechanisms; Vglut1 expression increased vesicular zinc uptake, and ZnT3 expression increased vesicular glutamate uptake in a zinc-dependent fashion, indicating functional coupling of their transport activities. |
Deconvolution microscopy, subcellular fractionation, whole-cell flow cytometry zinc uptake assay, pharmacological and genetic AP-3 perturbation |
Journal of cell science |
High |
15860731
|
| 2007 |
Microprobe synchrotron X-ray fluorescence demonstrated that the 2-3 fold elevation of total elemental zinc normally present in hippocampal mossy fibers is absent in ZnT3 knockout mice, confirming that ZnT3 controls the actual mass (not just histochemical stainability) of zinc in synaptic vesicles. |
Microprobe synchrotron X-ray fluorescence (quantitative elemental analysis), ZnT3 knockout mice |
The journal of histochemistry and cytochemistry |
High |
17712179
|
| 2009 |
ZnT3 forms covalent homo-oligomers via intermolecular dityrosine bonds; mutagenesis identified Y372 and Y357 as critical residues. Y372F mutation prevented oligomerization, reduced ZnT3 targeting to synaptic-like microvesicles, and decreased resistance to zinc toxicity. Y357F acted as a gain-of-function mutant with increased oligomerization, vesicle targeting, and zinc toxicity resistance, establishing that dityrosine dimerization regulates ZnT3 subcellular localization and zinc transport capacity. |
Site-directed mutagenesis, SDS-PAGE under non-reducing conditions, vesicle targeting assay, zinc toxicity resistance assay in PC12 cells |
PloS one |
High |
19521526
|
| 2009 |
siRNA-mediated knockdown of ZnT3 in INS-1E pancreatic beta cells decreased insulin expression and secretion; ZnT3 knockout mice showed higher glucose levels after streptozotocin-induced beta-cell stress. ZnT3 expression in beta cells was regulated by glucose concentration and zinc chelation. |
siRNA knockdown, ELISA insulin assay, in vivo streptozotocin model with ZnT3 KO mice, Western blot, immunohistochemistry |
PloS one |
Medium |
19492079
|
| 2011 |
ZnT3 knockout mice have reduced Erk1/2 MAPK activation in hippocampal mossy fiber terminals and disinhibited zinc-sensitive MAPK tyrosine phosphatase activity. Activity-dependent vesicular zinc exocytosis is required for presynaptic MAPK and phosphatase regulation. ZnT3KO mice show complete deficits in contextual discrimination and spatial working memory; local blockade of zinc or MAPK in the mossy fiber pathway of wild-type mice impairs contextual discrimination. |
ZnT3 KO mice, phospho-ERK immunoassay, pharmacological MAPK/zinc blockade, behavioral tasks (contextual discrimination, spatial working memory) |
Proceedings of the National Academy of Sciences of the United States of America |
High |
21245308
|
| 2012 |
In vascular smooth muscle cells, Angiotensin II-induced senescence requires zinc and downregulation of ZnT3 and ZnT10. Overexpression of ZnT3 decreased reactive oxygen species and prevented senescence. ZnT3 and ZnT10 downregulation by siRNA increases ROS and downregulates catalase by a post-transcriptional mechanism mediated by decreased ERK1/2 phosphorylation. |
Overexpression, siRNA knockdown, ROS assay, NADPH oxidase activity assay, AKT/Akt phosphorylation assay, catalase assay in vascular smooth muscle cells |
PloS one |
Medium |
22427991
|
| 2013 |
Potentiometric and spectroscopic (UV-Vis, CD, EPR, NMR) analyses of peptides mimicking ZnT3 metal-binding sequences identified a high-affinity zinc-binding site at the conserved N-terminal -HHCH- sequence (modeled by peptide L3), which binds zinc with 3-4 orders of magnitude higher stability than the His-rich intracellular loop, with {3N(im),S(-)} tetrahedral coordination, suggesting this site is involved in zinc sensing or translocation. |
Potentiometric titration, UV-Vis, CD, EPR, NMR spectroscopy of synthetic peptide-metal complexes |
Dalton transactions |
Medium |
23839275
|
| 2016 |
SLC30A3 knockdown in neuroblastoma cells (SH-SY5Y) reduced cell viability and increased cleaved caspase-3 under ER stress (tunicamycin treatment); SLC30A3 KD abolished the ERK1/2 phosphorylation increase normally induced by tunicamycin, placing SLC30A3 upstream of ERK1/2 activation in the cellular defense against ER stress. |
siRNA knockdown, cell viability assay, cleaved caspase-3 Western blot, ERK1/2 phosphorylation assay under tunicamycin treatment |
Biochemical and biophysical research communications |
Medium |
27678294
|
| 2016 |
ZnT3 gene deletion reduced motor deficits and neuropathological changes (demyelination, immune cell infiltration, BBB disruption) in a MOG-induced EAE multiple sclerosis model; ZnT3 deletion inhibited EAE-associated MMP-9 activation and formation of aberrant synaptic zinc patches. |
ZnT3 KO mice, EAE induction, clinical scoring, immunohistochemistry, MMP-9 activity assay, BBB permeability assay |
Neurobiology of disease |
Medium |
27370228
|
| 2020 |
Mutant huntingtin inhibits binding of the transcription factor Sp1 to GC boxes in the ZnT3 promoter, reducing ZnT3 transcription. Sp1 overexpression ameliorated mutant huntingtin-induced ZnT3 downregulation. This was demonstrated by dual-luciferase reporter gene assay and chromatin immunoprecipitation in HD transgenic mice and BHK cells expressing mutant huntingtin. |
Dual-luciferase reporter assay, chromatin immunoprecipitation (ChIP), Western blot, RT-PCR, autometallography in N171-82Q HD transgenic mice |
Cell & bioscience |
Medium |
32944220
|
| 2021 |
HDAC1, overexpressed in glioblastoma, inhibits SLC30A3 expression by promoting H3K27ac deacetylation of the super enhancer region of SLC30A3. SLC30A3 overexpression activates the MAPK signaling pathway to promote apoptosis of GBM cells and inhibits growth and metastasis in vitro and in vivo. |
ChIP-seq, GEO microarray analysis, overexpression/knockdown functional assays in vitro and in vivo, MAPK pathway analysis |
IUBMB life |
Medium |
33715270
|
| 2024 |
Cryo-EM structures of human ZnT3 (inward-facing conformation) and ZnT4 (outward-facing conformation) were determined; combining these structures revealed the conformational changes within the transmembrane domain during Zn2+ transport, consistent with a H+/Zn2+ antiporter mechanism. |
Cryo-electron microscopy structural determination of human ZnT3 and ZnT4 |
FEBS letters |
High |
39474773
|
| 2024 |
WFS1 regulates ZnT3 expression; in neural progenitor cells derived from hESCs, WFS1 deficiency caused upregulation of ZnT3 and dysregulated Zn2+ homeostasis leading to apoptosis. Riluzole treatment regulated ZnT3 expression to restore zinc homeostasis and protect NPCs from lipotoxicity-induced death. |
hESC neural differentiation, WFS1 knockout, ZnT3 expression analysis, apoptosis assay, riluzole pharmacological intervention |
Advanced science |
Medium |
39258564
|
| 2023 |
Neuronal-specific ZnT3 knockout mice showed markedly reduced extracellular fluid zinc levels and reduced BBB permeability after cerebral ischemia; elevated extracellular zinc (from ZnT3-mediated vesicular release) directly bound to and activated MMP-2 in extracellular fluid, leading to degradation of tight junction proteins and BBB disruption. |
Neuronal-specific ZnT3 KO mice, rat stroke model, extracellular zinc measurement, BBB permeability assay, MMP-2 activity assay, tight junction protein analysis |
Aging and disease |
Medium |
37962463
|
| 2024 |
ZnT3 knockout mice showed reduced hippocampal and cortical zinc, decreased density of mature dendritic spines, reduced expression of GLUT3, GLUT4, and insulin receptor in hippocampal synaptosomes, and reduced AKT expression and insulin-induced AKT phosphorylation, linking ZnT3-dependent zinc homeostasis to insulin signaling and synaptic plasticity. |
ZnT3 KO mice, Golgi-Cox staining of dendritic spines, Western blot for glucose transporters and insulin signaling components in synaptosomes, behavioral testing |
Frontiers in molecular neuroscience |
Medium |
38807922
|
| 2025 |
ZnT3 physically interacts with TMEM163 (shown by co-immunoprecipitation); under oxygen-glucose deprivation, both proteins translocate from the cell membrane to the cytoplasm, and their overexpression exacerbates extracellular zinc overload and neuronal apoptosis, while silencing attenuates zinc efflux and neuronal damage, demonstrating cooperative regulation of zinc homeostasis. |
Co-immunoprecipitation, cell surface biotinylation for localization, siRNA silencing, plasmid overexpression, FluoZin-3 zinc measurement, MTT viability assay, TUNEL staining in primary hippocampal neurons under OGD |
Frontiers in bioscience |
Medium |
41504061
|
| 2020 |
miR-5572 is elevated in sporadic ALS spinal cords and was predicted and validated to target SLC30A3 mRNA, providing a post-transcriptional mechanism for reduced ZnT3 levels in sALS. |
Microarray, real-time RT-PCR, TargetScan prediction, functional validation of miR-5572 targeting SLC30A3 |
International journal of molecular sciences |
Low |
32599739
|
| 2016 |
In pancreatic INS-1E beta cells, ZnT3 co-localizes with insulin in secretory granules near the plasma membrane (shown by immuno-gold electron microscopy); ZnT3 overexpression decreased insulin content and secretion but improved cell survival, while reducing ZnT8 mRNA expression, suggesting transcriptional co-regulation between ZnT3 and ZnT8. |
Immuno-gold electron microscopy, overexpression, insulin ELISA, cell viability assay, qRT-PCR |
Biometals |
Medium |
26867900
|