| 2000 |
SLP-2 (STOML2) was identified as a novel stomatin homologue present in erythrocytes and other tissues. It lacks the N-terminal hydrophobic domain of other stomatin homologues, is fully extractable from membranes by NaOH (pH 11), and partitions into both Triton X-100-soluble and -insoluble pools. It was shown to interact with the peripheral erythrocyte cytoskeleton but not directly with the membrane bilayer. |
Cloning, Western blot, SDS-PAGE, NaOH extraction, Triton X-100 fractionation, expression in COS cells |
The Journal of biological chemistry |
Medium |
10713127
|
| 2008 |
SLP-2 is strongly associated with the mitochondrial inner membrane and physically interacts with prohibitins (PHB1/PHB2). Depletion of SLP-2 in HeLa cells leads to increased proteolysis of prohibitins and of subunits of respiratory chain complexes I and IV, indicating SLP-2 stabilizes these proteins. |
Proteomic fractionation, co-immunoprecipitation, SLP-2 siRNA knockdown, Western blot for prohibitin and respiratory chain subunit levels |
Biochimica et biophysica acta |
High |
18339324
|
| 2009 |
SLP-2 is required for stress-induced mitochondrial hyperfusion (SIMH). In cells exposed to selective stresses (UV irradiation, actinomycin D), mitochondria hyperfuse in an MFN1- and L-OPA1-dependent manner; depletion of SLP-2 abolishes SIMH and causes loss of L-OPA1. SIMH is accompanied by increased mitochondrial ATP production and represents a pro-survival adaptive response. |
SLP-2 siRNA knockdown, mitochondrial morphology imaging, immunoblot for OPA1 isoforms, ATP production assay, epistasis with MFN1/MFN2/BAX/BAK/prohibitin knockdowns |
The EMBO journal |
High |
19360003
|
| 2009 |
SLP-2 localizes to mitochondria, where it affects mitochondrial membrane potential (MMP) and ATP production. Knockdown of SLP-2 by siRNA inhibits cell motility, proliferation, and enhances chemosensitivity, with decreased MMP and ATP levels. |
siRNA knockdown, mitochondrial membrane potential assay, ATP production assay, immunofluorescence localization, proliferation and motility assays |
Cancer biology & therapy |
Medium |
19597348
|
| 2009 |
SLP-2 negatively modulates mitochondrial sodium-calcium exchange (Na+/Ca2+ exchanger). SLP-2 depletion in HeLa cells increased rates of mitochondrial Ca2+ extrusion via the Na+/Ca2+ exchanger, an effect blocked by Na+ removal or CGP-37157 (NCX inhibitor). SLP-2 overexpression prolonged mitochondrial Ca2+ retention and decreased cytosolic Ca2+ elevations. |
siRNA knockdown, SLP-2 overexpression, mitochondrial Ca2+ imaging, pharmacological inhibition (CGP-37157, Na+ removal), permeabilized cell assay |
Cell calcium |
High |
19944461
|
| 2011 |
STOML2 knockdown in glioma cells reduces invasion and migration through inhibition of the NF-κB transcriptional pathway and consequent downregulation of MMP-9. A luciferase reporter assay confirmed the effect on MMP-9 is NF-κB-dependent. |
siRNA knockdown, Transwell invasion assay, luciferase NF-κB reporter assay, Western blot for MMP-9 and NF-κB target genes |
The Journal of pathology |
Medium |
21960069
|
| 2013 |
In C. elegans, the STOML2 orthologue STL-1 (stomatin-like 1) is transcriptionally induced by SKN-1/Nrf in response to anoxia and facilitates mitochondrial dynamics (fission and refusion) following anoxia-reoxygenation. SKN-1 promotes STL-1 expression to support mitochondrial reconstitution during reoxygenation. |
C. elegans genetics, transcriptional reporter assays, mitochondrial morphology imaging, epistasis analysis with egl-9, hif-1, skn-1 mutants |
PLoS genetics |
Medium |
24385935
|
| 2017 |
SLP-2 physically interacts with Parkin at the mitochondrial level (confirmed by co-immunoprecipitation and proximity ligation assay on endogenous proteins). SLP-2 also binds cardiolipin. Knockdown of SLP-2 decreases respiratory chain complex I activity and alters mitochondrial network morphology. Overexpression of SLP-2 rescues complex I deficiency and mitochondrial morphology in Parkin-deficient cells. In Drosophila, SLP-2 genetically interacts with parkin and its overexpression rescues loss of dopaminergic neurons, mitochondrial structure, ATP production, and motor dysfunction in parkin mutants. |
Co-immunoprecipitation, proximity ligation assay (endogenous proteins), siRNA/shRNA knockdown, high-resolution respirometry, mitochondrial imaging, iPSC-derived neuron models, Drosophila genetics and rescue experiments |
Human molecular genetics |
High |
28379402
|
| 2021 |
STOML2 interacts with and stabilizes PINK1 under cellular stress, amplifying PINK1-Parkin-mediated mitophagy. HIF-1α transcriptionally upregulates STOML2 expression in HCC cells under lenvatinib treatment. STOML2 co-immunoprecipitates with PINK1. |
Co-immunoprecipitation, Western blot, laser confocal microscopy, transmission electron microscopy, ChIP assay, luciferase reporter assay, flow cytometry, gain/loss-of-function experiments |
Journal of hematology & oncology |
Medium |
33446239
|
| 2021 |
STOML2 interacts with PHB (prohibitin) and activates the MAPK signaling pathway (RAF1/MEK1/2/ERK1/2 phosphorylation) to promote colorectal cancer proliferation. The interaction was confirmed by co-immunoprecipitation and co-localization by immunofluorescence; yeast two-hybrid initially identified PHB among interactors. |
Yeast two-hybrid screen, co-immunoprecipitation, immunofluorescence co-localization, Western blot for MAPK pathway components, organoid culture, orthotopic tumor model |
Journal of experimental & clinical cancer research : CR |
Medium |
34781982
|
| 2022 |
CYB5A binds to STOML2 and through this interaction inhibits the JAK1/STAT3 signaling pathway, thereby reducing HCC metastasis. |
Co-immunoprecipitation, Western blot, in vitro and in vivo metastasis assays |
Cell death & disease |
Low |
35851063
|
| 2023 |
STOML2 stabilizes PARL (a mitochondrial protease) and thereby prevents PINK1 degradation and PINK1-dependent mitophagy. In pancreatic cancer cells, STOML2 overexpression restricts gemcitabine-induced mitophagy through the PARL/PINK1 pathway. |
siRNA/overexpression, Western blot, flow cytometry, mitophagy assays, xenograft models |
Cell death & disease |
Medium |
36906621
|
| 2024 |
STOML2 binds TRADD protein and through this interaction activates the NF-κB signaling pathway, upregulating CCND1, VEGF, and PD-L1 to promote CRC proliferation, angiogenesis, and immune escape. |
Co-immunoprecipitation (STOML2-TRADD), Western blot for NF-κB pathway components, in vitro proliferation/angiogenesis assays, NF-κB inhibitor treatment, in vivo tumor models |
Cellular and molecular life sciences : CMLS |
Medium |
38214751
|
| 2024 |
The Parkin-SLP-2 interaction maps to the RING0 domain of Parkin. PD-associated PRKN mutations reduce the Parkin-SLP-2 interaction as measured by proximity ligation assay. Three binding sites within RING0 predicted by computational modeling overlap with PD-causing missense mutations. Delivery of the isolated Parkin RING0 domain or a Parkin mini-peptide into Parkin-deficient cells rescues compromised mitochondrial function. |
Proximity ligation assay (endogenous proteins), domain mapping with truncation constructs, computational modeling on Parkin crystal structure, high-resolution respirometry, immunofluorescence, live imaging, iPSC-derived neuron models, fibroblasts from PD patients |
Journal of translational medicine |
High |
38229174
|
| 2025 |
STOML2 inhibits sorafenib-induced ferroptosis in HCC by activating the AKT-SLC7A11 axis, increasing intracellular antioxidant capacity and reducing lipid peroxidation. AKT inhibitor LY294002 synergizes with sorafenib in STOML2-high HCC cells. |
siRNA knockdown, Western blot for AKT/SLC7A11, lipid peroxidation assay (MDA), flow cytometry for ROS/ferroptosis markers, clone formation assay, pharmacological rescue with LY294002 |
American journal of cancer research |
Low |
40371153
|
| 2026 |
Under hypoxia, HIF-1α translocates to the nucleus and transcriptionally upregulates STOML2. STOML2 then translocates to the outer mitochondrial membrane and participates in PGAM5 cleavage, triggering PINK1-dependent mitophagy as a neuronal self-protection mechanism. Knockdown of HIF-1α, STOML2, or PGAM5 inhibits this mitophagy and worsens hypoxia-induced neuronal dysfunction. |
siRNA knockdown of HIF-1α, STOML2, and PGAM5, overexpression of PINK1, Western blot, immunofluorescence for STOML2 translocation, mitophagy assays, neurological function tests, intermittent hypoxia conditioning |
Cell death discovery |
Medium |
41723145
|
| 2026 |
STOML2 interacts with the mitochondrial Na+/Ca2+ exchanger NCLX to support mitochondrial Ca2+ efflux and metabolic stability. STOML2 depletion impairs oxidative phosphorylation, elevates mitochondrial ROS, and promotes chondrocyte senescence and ferroptosis. Restoring STOML2 enhances NCLX-dependent Ca2+ handling and improves ATP production in chondrocytes. |
Co-immunoprecipitation (STOML2-NCLX), siRNA knockdown, overexpression, mitochondrial Ca2+ imaging, ROS measurement, ATP assay, Seahorse respirometry, intra-articular delivery in rat OA model |
Genetics research |
Medium |
41995387
|
| 2026 |
STOML2 and PHB are upregulated in human pluripotent stem cells (hPSCs). STOML2 knockdown reduces OCT4, NANOG, PHB, and phosphorylated ERK levels while increasing differentiation markers, indicating STOML2 maintains hPSC pluripotency and cell cycle integrity through the PHB-ERK/MAPK signaling axis. |
shRNA knockdown, qRT-PCR, Western blot for ERK phosphorylation and pluripotency markers, transcriptomic profiling |
International journal of stem cells |
Low |
41709508
|
| 2025 |
SLP-2 levels are reduced in human PD brains and in an A53T αSyn mouse model. Mild overexpression of SLP-2 improves mitochondrial function, reduces oxidative stress, prevents αSyn-mitochondria interactions in iPSC-derived neurons, and protects dopaminergic neurons and motor function in vivo. SLP-2 depletion exacerbates neurodegeneration and motor deficits in both mouse and Drosophila models. |
Immunohistochemistry/Western blot in human PD brain and mouse model, SLP-2 overexpression and depletion in iPSC-derived neurons, mitochondrial function assays, ROS measurement, proximity/co-localization for αSyn-mitochondria interaction, in vivo mouse and Drosophila experiments |
bioRxivpreprint |
Medium |
|