| 2013 |
STX13 (STX12) is required for autophagosome maturation: knockdown of STX13 or its binding partner Vti1a in mammalian cells caused LC3-positive puncta accumulation and blocked autophagic flux. STX13 was present on LC3-positive phagophores and was highly enriched on multilamellar structures induced by dysfunctional ESCRT-III. Loss of STX13 also caused accumulation of Atg5-positive puncta and multilamellar structure formation, suggesting STX13 participates in phagophore-to-autophagosome maturation. Genetically, Drosophila syx13 exhibited strong genetic interaction with mutant CHMP2B (ESCRT-III component). |
siRNA knockdown in mammalian cells, live-cell imaging (LC3/Atg5 puncta), Drosophila genetic modifier screen, electron microscopy |
Molecular cell |
High |
24095276
|
| 2014 |
STX12 (syntaxin13) and SNAP23 mediate membrane trafficking required for invadopodia formation and tumor cell invasion. The association of Src, EGFR, and β1 integrin at invadopodia is dependent on STX12/SNAP23-mediated traffic. Inhibition of SNARE function impaired delivery of Src and EGFR to developing invadopodia and blocked β1-integrin-dependent Src activation and EGFR phosphorylation (Tyr845). β1 integrin inhibition increased SNAP23–β1 integrin association and reduced STX12–SNAP23 interaction. |
Co-immunoprecipitation, SNARE inhibition, live-cell imaging of invadopodia, matrix degradation assay, invasion assay |
Journal of cell science |
Medium |
24496451
|
| 2015 |
STX13 (STX12), a recycling endosomal Qa-SNARE, is required for cargo delivery to maturing melanosomes. Depletion of STX13 in melanocytes reroutes melanosomal proteins TYR and TYRP1 to lysosomes. Live-cell imaging and EM showed STX13 co-distributes with melanosomal cargo in tubular-vesicular endosomes associated with maturing melanosomes. Deletion of the N-terminal regulatory domain of STX13 increases SNARE activity in vivo and melanosome cargo transport. STX13-dependent cargo transport requires the R-SNARE VAMP7; silencing VAMP7 blocks melanosome maturation, and STX13 and VAMP7 show mutual dependency for their localization. |
siRNA knockdown, live-cell imaging, electron microscopy, domain-deletion mutagenesis, pigmentation assay |
Journal of cell science |
High |
26208634
|
| 2019 |
STX12 is a substrate of the endosomal kinase SGK3: SGK3 phosphorylates STX12 at Ser139 in vitro and in cells stimulated with IGF1. This phosphorylation is blocked by SGK3 knockout or pan-SGK inhibitor. SGK3 phosphorylation of STX12 enhanced interaction with the VAMP4/VTI1A/STX6-containing SNARE complex and promoted plasma membrane localization of STX12. |
Phosphoproteomic screen, in vitro kinase assay, Phos-tag analysis, SGK3 knockout cells, pharmacological inhibition |
The Biochemical journal |
High |
31665227
|
| 2020 |
STX12 expression is upregulated through a ROS/STAT3/NFE2L1 transcriptional axis downstream of mitochondrial respiratory defects in hepatoma cells. NFE2L1 was identified as a direct transcriptional regulator of STX12 by cDNA microarray after NFE2L1 overexpression/depletion. STX12 functions as a key downstream effector of NFE2L1 modulating hepatoma cell invasiveness. |
cDNA microarray, NFE2L1 overexpression/depletion, ROS measurement, STAT3 inhibition, invasion assay, immunohistochemistry |
Cancers |
Medium |
32942643
|
| 2021 |
tSNARE1, a schizophrenia-risk protein, competes with STX12 for incorporation into an endosomal SNARE complex, supporting a role for tSNARE1 as an inhibitory SNARE that negatively regulates early-to-late endosomal trafficking in which STX12 participates. |
Biochemical competition assay (SNARE complex incorporation), live-cell imaging, RNA-sequencing |
The Journal of neuroscience |
Medium |
34642214
|
| 2022 |
STX12 (Stx12) physically associates with VPS16B/VPS33B and is required for platelet α-granule biogenesis in megakaryocytes. Stx12-deficient megakaryocytes display reduced α-granule numbers and overall α-granule protein levels. CCDC22 (CCC complex) competes with Stx12 for binding to VPS16B/VPS33B, suggesting a hand-off mechanism between endosomal entry (Stx12-mediated fusion) and exit (CCC-mediated retrieval). |
Co-immunoprecipitation, Stx12 knockdown/knockout in megakaryocytes, α-granule quantification by electron microscopy, competitive binding assay |
Blood |
High |
34905616
|
| 2024 |
The Chlamydia trachomatis effector IncE recruits STX7- and STX12-containing vesicles to the bacterial inclusion via a short linear motif (SLiM) in its cytosolic C-terminus that mimics an R-SNARE motif, binding STX12-containing vesicles to facilitate intracellular bacterial development. |
SLiM mutant analysis, pulldown/binding assays, fluorescence imaging of vesicle recruitment to inclusion |
Cell reports |
Medium |
39154341
|
| 2023 |
F. nucleatum infection promotes miR-31 expression in colorectal cancer cells; miR-31 inhibits autophagic flux by targeting STX12. STX12 knockdown phenocopied miR-31 overexpression in blocking autophagy, and STX12, miR-31, and F. nucleatum form a regulatory loop in the autophagy pathway. |
miR-31 overexpression/knockout, STX12 knockdown, autophagic flux assay (LC3 accumulation), luciferase reporter for miR-31 targeting of STX12 |
iScience |
Medium |
37216106
|
| 2025 |
STX12 deficiency causes depolarization of mitochondrial membrane potential, reduced mitochondrial complex subunit levels, mitochondrial DNA (mtDNA) release into the cytoplasm, and activation of the cGAS-STING pathway and Type I interferon pathway in lung tissue of Stx12-/- mice. Stx12 knockout mice exhibit perinatal lethality with severe pulmonary inflammation, neutrophil infiltration, and increased cytokines. |
Stx12 knockout mice, zebrafish Stx12 depletion, mitochondrial membrane potential measurement (JC-1), Western blot for complex subunits, qPCR for interferon genes, immunohistochemistry |
Cell communication and signaling : CCS |
Medium |
40200300
|
| 2025 |
STX12 loss in zebrafish and mice causes pericardial edema, cardiac malformations, and heart failure associated with disrupted mitochondrial morphology, reduced iron and zinc, impaired ATP production, and prolonged cardiomyocyte repolarization due to decreased SERCA activity. Rapamycin treatment restores mitochondrial protein expression via TFEB-PGC1α and enhances SERCA activity via CAMKII-phospholamban pathway. |
Zebrafish morpholino knockdown, mouse Stx12 knockout, echocardiography, mitochondrial morphology EM, ATP measurement, metal quantification, SERCA activity assay, rapamycin treatment |
Advanced science |
Medium |
40568929
|
| 2025 |
ELAPOR1, a tethering factor for proacrosomal vesicle fusion during acrosome biogenesis, physically interacts with STX12. Conditional knockout of Stx12 in germ cells resulted in defective acrosome biogenesis similar to Elapor1-/- mice, establishing STX12 as part of the vesicle fusion machinery for acrosome formation. |
Co-immunoprecipitation, conditional Stx12 knockout in germ cells, acrosome morphology by fluorescence and electron microscopy |
Proceedings of the National Academy of Sciences |
Medium |
40737321
|
| 2025 |
ATG9A vesicles fuse with the plasma membrane via an STX13-SNAP23-VAMP3 SNARE complex to secrete galectin-9 and other proteins (galectin-4, galectin-8, annexin A6) in an autophagy-independent unconventional secretion pathway. |
SNARE knockdown/knockout, co-immunoprecipitation, live-cell imaging of vesicle fusion, galectin-9 secretion assay |
Nature communications |
Medium |
40335523
|
| 2025 |
STX12 knockdown reduces MR1 antigen presentation of Mycobacterium tuberculosis-derived ligands to MAIT cells in airway epithelial cells. Stx12 blockade increases MR1 surface stabilization and total MR1 expression, indicating that STX12-dependent endosomal trafficking is required for MR1 internalization and antigen loading at sorting endosomes. |
siRNA-mediated knockdown, MR1 surface expression by flow cytometry, MR1-GFP co-localization imaging, MAIT cell activation assay |
Scientific reports |
Medium |
42215548
|
| 2026 |
Coronin-1a (Coro1a) promotes extracellular vesicle biogenesis by facilitating assembly of the STX12-SNAP23-VAMP7 SNARE complex to drive multivesicular body–plasma membrane fusion. Coro1a activates PKM2 to phosphorylate SNAP23, which recruits STX12 and VAMP7 into the SNARE complex; this effect is abolished by PKM2 inhibition or SNAP23 silencing. |
Co-immunoprecipitation, SNARE complex assembly assay, PKM2 inhibition, SNAP23 knockdown, EV quantification |
Communications biology |
Medium |
42265296
|
| 2026 |
SF3A1 (splicing factor 3A1) stabilizes STX12 mRNA in colorectal cancer cells; STX12 functions downstream of SF3A1 to inhibit apoptosis. Knockdown of STX12 alone induces apoptosis in CRC cells (but not non-cancerous cells), and SF3A1 knockdown reduces STX12 mRNA levels, establishing an SF3A1–STX12 anti-apoptotic axis in CRC. |
RNA-immunoprecipitation (RIP), STX12 knockdown, TUNEL staining, PARP cleavage, caspase-3/7 activity, xenograft mouse model |
International journal of molecular sciences |
Medium |
41683622
|
| 2026 |
GRIPAP1, an endosomal tethering factor for platelet α-granule biogenesis, localizes to endosome subdomains decorated by Rab4a and Stx12. Artificial mislocalization of GRIPAP1 to mitochondria was sufficient to recruit Rab4a/Stx12 compartments containing internalized transferrin and newly synthesized PF4 to mitochondria, indicating that Stx12 marks a specific Rab4a-positive endosomal subdomain involved in α-granule cargo sorting. |
Co-localization imaging, artificial mitochondrial targeting of GRIPAP1, transferrin trafficking assay, PF4 trafficking assay |
The Journal of cell biology |
Medium |
41632639
|