| 2012 |
TSPAN15 directly interacts with ADAM10 (identified by split-ubiquitin yeast two-hybrid screen and co-immunoprecipitation in mammalian cells), accelerates ER exit of the ADAM10-TSPAN15 complex (shown by pulse-chase experiments with an ER-retention mutant), stabilizes the active/mature form of ADAM10 at the cell surface, and increases ADAM10-mediated shedding of N-cadherin and amyloid precursor protein. |
Split-ubiquitin yeast two-hybrid, co-immunoprecipitation, ER-retention mutant overexpression, RNAi knockdown, pulse-chase experiments, N-cadherin/APP shedding assays |
Cellular and molecular life sciences : CMLS |
High |
22446748
|
| 2012 |
TSPAN15 (along with all TspanC8 members: Tspan5, Tspan10, Tspan14, Tspan17, Tspan33) co-immunoprecipitates with ADAM10 and promotes ADAM10 maturation (prodomain processing) and trafficking to the cell surface, establishing TspanC8 tetraspanins as essential regulators of ADAM10 maturation. |
Co-immunoprecipitation, cell surface expression assays, maturation assays in multiple cell lines |
The Journal of biological chemistry |
High |
23035126
|
| 2012 |
TspanC8 tetraspanins including TSPAN15 directly interact with ADAM10, regulate its exit from the endoplasmic reticulum, and promote Notch activation; two TspanC8 genes were identified as Notch regulators in an independent Drosophila RNAi screen, and human Tspan5 and Tspan14 positively regulated ligand-induced ADAM10-dependent Notch1 signaling (TSPAN15 interaction with ADAM10 confirmed but its specific effect on Notch was not separately quantified in this paper). |
Co-immunoprecipitation, RNAi screen in Drosophila, Notch reporter assays, overexpression in mammalian cells |
The Journal of cell biology |
High |
23091066
|
| 2015 |
TSPAN15 (and Tspan5, Tspan14, Tspan33) positively regulates ADAM10 surface expression levels and differentially impacts ADAM10-dependent cleavage of APP, N-cadherin, and CD44, as well as Notch activation, by differentially regulating ADAM10 membrane compartmentalization; sucrose gradient fractionation, single molecule tracking, and quantitative mass-spectrometry showed that Tspan5 and Tspan15 place ADAM10 in distinct membrane compartments with different molecular environments. |
Sucrose gradient fractionation, single molecule tracking, quantitative mass-spectrometry co-immunoprecipitation, Notch reporter assays, substrate shedding assays |
Cellular and molecular life sciences : CMLS |
High |
26686862
|
| 2015 |
The large extracellular loop (LEL) of Tspan14 mediates co-immunoprecipitation with ADAM10 and promotes ADAM10 maturation and trafficking; chimeric ADAM10 constructs showed that the membrane-proximal stalk, cysteine-rich, and disintegrin domains of ADAM10 mediate its interaction with TspanC8s including Tspan15, and this region is required for ADAM10 ER exit. Tspan15 was the only TspanC8 to promote cleavage of N-cadherin, whereas Tspan14 uniquely reduced cleavage of GPVI, indicating distinct substrate selectivity depending on the associated TspanC8. |
Chimeric protein constructs, co-immunoprecipitation, substrate cleavage assays, antibody development to endogenous Tspan14 |
The Journal of biological chemistry |
High |
26668317
|
| 2018 |
In Tspan15 knockout mice, the active/mature form of ADAM10 is substantially decreased in brain tissue, and this is accompanied by age-dependent reduced shedding of N-cadherin and cellular prion protein, but not APP alpha-secretase cleavage or Notch-dependent gene expression, demonstrating that Tspan15 in vivo preferentially directs ADAM10 toward specific substrates (N-cadherin, PrP) rather than others (APP, Notch targets). |
Tspan15 knockout mouse model, western blotting for ADAM10 maturation, substrate shedding assays (N-cadherin, PrP, APP), Notch target gene expression analysis |
Cellular and molecular life sciences : CMLS |
High |
29520422
|
| 2019 |
ADAM10 undergoes faster endocytosis in the presence of Tspan5 than Tspan15; Tspan15 stabilizes ADAM10 at the cell surface yielding high surface expression levels, and reciprocally ADAM10 stabilizes Tspan15 at the cell surface (the Tspan15/ADAM10 complex is retained at the plasma membrane). The cytoplasmic domains of Tspan5 and Tspan15 contribute to their opposite effects on ADAM10 trafficking and Notch signaling, while an unusual C-terminal palmitoylation site of Tspan15 is dispensable for these functions. |
Endocytosis assays, cell surface biotinylation, flow cytometry, chimeric cytoplasmic domain constructs, palmitoylation site mutagenesis |
Life science alliance |
High |
31792032
|
| 2020 |
Endogenous Tspan15 and ADAM10 co-localize on the cell surface; ADAM10 is the principal Tspan15-interacting protein; endogenous Tspan15 expression requires ADAM10 in cell lines and primary cells (Tspan15 is unstable without ADAM10); a synthetic ADAM10/Tspan15 fusion protein is a functional scissor complex; two of four anti-Tspan15 monoclonal antibodies impaired ADAM10/Tspan15 activity. |
Monoclonal antibody generation, co-localization by immunofluorescence, co-immunoprecipitation of endogenous proteins, ADAM10-knockout cell lines, synthetic fusion protein assay, substrate cleavage inhibition assay |
The Journal of biological chemistry |
High |
32111735
|
| 2021 |
Crystal structure of the Tspan15 large extracellular loop (LEL) was solved, revealing a core helical framework with a variable region; a site on the Tspan15 LEL required for both ADAM10 binding and promoting N-cadherin substrate cleavage was identified by co-immunoprecipitation and cellular cleavage assay. |
X-ray crystallography, co-immunoprecipitation, N-cadherin cellular cleavage assay, mutagenesis of LEL binding site |
Structure (London, England : 1993) |
High |
34739841
|
| 2023 |
Cryo-EM structure of a vFab-ADAM10-Tspan15 complex shows that Tspan15 binding relieves ADAM10 autoinhibition and acts as a molecular measuring stick, positioning the ADAM10 enzyme active site approximately 20 Å from the plasma membrane for membrane-proximal substrate cleavage. Cell-based N-cadherin shedding assays confirmed that the positioning of the active site by the ADAM10-Tspan15 interface influences preferred cleavage site selection. |
Cryo-EM structure determination, cell-based N-cadherin shedding assays, interface mutagenesis |
Cell |
High |
37516108
|
| 2018 |
TSPAN15 specifically interacts with BTRC (beta-TrCP) E3 ubiquitin ligase to promote ubiquitination and proteasomal degradation of phospho-IκBα, thereby triggering NF-κB nuclear translocation and activation of metastasis-related genes (ICAM1, VCAM1, uPA, MMP9, TNFα, CCL2) in oesophageal squamous cell carcinoma cells. |
Co-immunoprecipitation, ubiquitination assay, NF-κB reporter assay, western blotting for IκBα degradation and p65 nuclear translocation, target gene expression analysis |
Nature communications |
Medium |
29650964
|
| 2022 |
CRISPR/Cas9 knockout of Tspan15 (and Tspan33) in human cell lines demonstrated that Tspan15 and Tspan33 play compensatory roles in GPVI cleavage by ADAM10, with Tspan15 bearing the more important role. The Tspan15 extracellular region was found critical for promoting GPVI cleavage, enabling ADAM10 access to the cleavage site at a particular distance above the membrane. |
CRISPR/Cas9 knockout cell lines, Tspan15 and GPVI mutant expression constructs, GPVI cleavage assays |
International journal of molecular sciences |
High |
35269584
|
| 2023 |
Tspan15 is a component of TSG101- and CD81-positive extracellular vesicle (EV) fractions in neurons. Tspan15 is dispensable at target neuron plasma membranes but is required at the EV surface to promote EV docking at target neurons, as EVs from Tspan15 knockout cortical neurons showed significantly impaired association with target cells compared to wild-type EVs. |
EV fractionation and marker analysis, fluorescent fusion protein tracking, Tspan15 knockout mouse cortical neuron EVs, target cell docking assays |
Journal of extracellular biology |
Medium |
38938373
|
| 2019 |
In oral squamous cell carcinoma cells, knockdown of Tspan15 reduced ADAM10 expression, decreased soluble N-cadherin shedding, reduced nuclear β-catenin immunoreactivity, and suppressed tumor invasion and migration, placing Tspan15 upstream of ADAM10-mediated N-cadherin shedding and downstream Wnt/β-catenin signaling in OSCC metastasis. |
siRNA knockdown, N-cadherin shedding ELISA, immunofluorescence for β-catenin localization, Transwell invasion/migration assays |
Experimental cell research |
Medium |
31518558
|
| 2019 |
Tspan15 overexpression in the hepatoma cell line HepG2 increases ERK1/2 phosphorylation, leading to increased CTGF expression and secretion; proteomic profiling of Tspan15 complexes identified multiple membrane proteins including growth factor receptors as interaction partners. |
Overexpression, western blotting for p-ERK1/2, quantitative secretome proteomics (MS), Tspan15 complex immunoprecipitation/MS |
Proteomics |
Medium |
31390680
|
| 2025 |
TSPAN15 directly interacts with integrin-β1 (ITGB1) and maintains ITGB1 stability by inhibiting its ubiquitination; this interaction activates downstream p-FAK/p-AKT/p-mTOR signaling and promotes GPX4 expression, thereby attenuating gemcitabine-induced ferroptosis in pancreatic ductal adenocarcinoma cells. |
Co-immunoprecipitation, ubiquitination assay, western blotting for FAK/AKT/mTOR phosphorylation and GPX4, TSPAN15 knockdown in vitro and in vivo xenograft, ferroptosis assays |
Redox biology |
Medium |
40505345
|
| 2025 |
TSPAN15 physically interacts with BTRC to promote proteasomal degradation of tumor suppressor PDCD4 via ubiquitination, thereby activating autophagy and autophagy-mediated EMT and metastasis in hepatocellular carcinoma cells. |
Co-immunoprecipitation, ubiquitination assay, autophagic flux analysis, TSPAN15 silencing, PDCD4 rescue experiments, xenograft mouse model |
Molecular immunology |
Medium |
40398082
|
| 2023 |
In intrahepatic cholangiocarcinoma (ICC) cells, Tspan15 mediates translocation of activated mature ADAM10 from the cytoplasm to the cell membrane surface, which cleaves the Notch1 intracellular domain from its extracellular domain, activating Notch1 signaling and enhancing cancer stem cell-like properties, EMT, and chemoresistance against gemcitabine and cisplatin. |
Western blotting, flow cytometry, immunohistochemistry, RT-PCR, Tspan15/ADAM10 knockdown, Notch1 activation assays, chemoresistance functional assays |
Liver international : official journal of the International Association for the Study of the Liver |
Medium |
37545390
|
| 2024 |
In invasive bladder cancer cells, Tspan15 is required for ADAM10-mediated selective cleavage of N-cadherin; the PPARβ/δ agonist GW501516 decreases Tspan15 expression and prevents N-cadherin cleavage (NTF generation) without modifying ADAM10 expression levels, demonstrating that pharmacological targeting of Tspan15 can selectively block ADAM10 substrate cleavage. |
siRNA knockdown of Tspan15, western blotting for N-cadherin fragments (NTF/CTF1), GW501516 treatment, ADAM10 expression analysis |
Cells |
Medium |
38667323
|
| 2025 |
A tricomponent complex of THSD7A/ADAM10/Tspan15 was found in podocytes; Tspan15 regulates ADAM10 substrate usage and the stability of podocyte cell surface proteins (THSD7A, PLA2R1, β-dystroglycan), where THSD7A acts as both an ADAM10 substrate and regulator of the complex; Tspan15 is present at podocyte foot processes. |
Co-localization and Co-IP, ADAM10-deficient mice, ADAM10-inhibited pig glomeruli, in vitro shedding assays, biochemical fractionation |
Kidney international |
Medium |
40339751
|
| 2025 |
Silencing of Tspan15 (and Tspan10) in astrocytoma cells reduced Venezuelan equine encephalitis virus (VEEV) genome replication without affecting viral entry; silencing of the ADAM10 substrate N-cadherin also reduced VEEV infectivity, suggesting Tspan15/ADAM10 and downstream substrates modulate VEEV replication. |
siRNA silencing, pharmacological ADAM10 inhibition, VEEV infection assays, viral entry vs. replication discrimination assays |
Molecular biology of the cell |
Low |
39878649
|
| 2000 |
TSPAN15 (identified as NET-7) was identified and sequenced as a new tetraspanin family member with the characteristic structure of four transmembrane domains, two extracellular regions, and conserved tetraspanin amino acid residues; it shows differential expression across human cell lines. |
EST sequencing, sequence analysis, RT-PCR expression profiling |
Biochimica et biophysica acta |
Low |
10719184
|