| 2009 |
G0S2 encodes a mitochondria-localized protein that directly binds Bcl-2 and promotes apoptosis by preventing the formation of protective Bcl-2/Bax heterodimers; G0S2 lacks Bcl-2 homology domains but antagonizes Bcl-2 antiapoptotic activity. Expression is induced by TNF-alpha through NF-κB. |
Co-immunoprecipitation, subcellular fractionation, ectopic expression in cancer cell lines, expression profiling with NF-κB inhibition |
Cancer research |
Medium |
19706769
|
| 2010 |
G0S2 acts as a direct inhibitor of adipose triglyceride lipase (ATGL) activity and ATGL-mediated lipolysis. G0S2 binds ATGL independently of ATGL's activity state or the presence of CGI-58. Combined expression of CGI-58 and ATGL cannot stimulate lipid droplet turnover in G0S2-expressing cells, indicating G0S2 and CGI-58 regulate ATGL via non-competing mechanisms. |
Co-immunoprecipitation, lipid droplet morphology assays, lipolysis assays in cells overexpressing G0S2, CGI-58 and ATGL constructs |
Cell cycle (Georgetown, Tex.) |
High |
20676045
|
| 2011 |
The minimal active domain of ATGL required for inhibition by G0S2 ranges from amino acids Ile10 to Leu254. This minimal fragment retains both protein-protein interaction with G0S2 and susceptibility to G0S2-mediated inhibition, implying G0S2 interacts with the patatin-domain region of ATGL. |
Truncation mutagenesis, in vitro lipase activity assays, protein-protein interaction assays, 3D homology modeling |
PloS one |
High |
22039468
|
| 2008 |
G0S2 is a direct transcriptional target of retinoic acid (RA) signaling. Retinoic acid response element (RARE) half-sites in the G0S2 promoter are required for RA-mediated transcriptional activation; mutation of these sites blocks activation. RAR co-transfection assays confirmed transcriptional activation after RA treatment. G0S2 protein is rapidly induced in APL cells and APL transgenic mice treated with RA in an RAR-dependent manner. |
Reporter gene assays with RARE site mutagenesis, RAR co-transfection, actinomycin D/cycloheximide treatment, RT-PCR, polyclonal antibody detection of protein |
International journal of oncology |
High |
18636162
|
| 2012 |
G0S2 localizes to mitochondria, endoplasmic reticulum, and early endosomes in hematopoietic cells. The hydrophobic domain of G0S2 interacts with the RGG-repeat domain of nucleolin, retaining nucleolin in the cytosol; this cytosolic retention of nucleolin occurs in resting but not proliferating hematopoietic stem cells. G0S2 overexpression increases HSC quiescence while G0S2 knockdown promotes HSC division. |
Retroviral overexpression, shRNA knockdown, bone marrow transplantation, cell cycle analysis, proteomic identification of binding partners (nucleolin), subcellular fractionation/imaging |
PloS one |
Medium |
22693613
|
| 2013 |
G0S2 inhibits proliferation of K562 leukemia cells by sequestering nucleolin in the cytosol, preventing its pro-proliferative functions in the nucleolus. Knockdown of G0S2 by shRNA in 5-azacytidine-treated K562 cells restores proliferation. |
5-azacytidine demethylation, shRNA knockdown, xenograft models, co-immunoprecipitation/interaction assays with nucleolin, proliferation assays |
Leukemia research |
Medium |
24183236
|
| 2013 |
Adipose-specific overexpression of G0S2 in transgenic mice inhibits basal and adrenergically stimulated lipolysis in adipose explants, reduces in vivo lipolysis and ketogenesis during fasting, impairs the metabolic shift from carbohydrates to fatty acids, and promotes lipid droplet accumulation in brown adipocytes with defective cold adaptation. |
Adipose-specific transgenic mouse model, lipolysis assays in adipose explants, in vivo metabolic measurements, β3-adrenergic agonist injection, cold tolerance tests, high-fat diet feeding |
The Journal of biological chemistry |
High |
24302733
|
| 2014 |
Deletion of G0s2 in mice leads to a lean phenotype with enhanced adipose lipase activity, increased stimulated lipolysis in adipocytes, resistance to high-fat diet weight gain, improved glucose and insulin tolerance, and enhanced 'browning' of white adipose tissue with upregulation of thermoregulatory genes. |
G0s2 knockout mouse generation, lipolysis assays, metabolic phenotyping (body composition, glucose/insulin tolerance tests, energy metabolism), gene expression analysis |
Diabetologia |
High |
25381555
|
| 2014 |
G0s2-null mice are lean with increased serum glycerol (indicating enhanced lipolysis), decreased gonadal fat pad weight, improved cold tolerance, and augmented thermogenic gene expression. G0S2 is most highly expressed in adipose tissue. |
G0s2 knockout mouse, body composition analysis, serum glycerol measurement, cold tolerance tests, tissue expression profiling |
Cancer biology & therapy |
High |
24556704
|
| 2016 |
G0S2 protein is degraded via K48-linked polyubiquitination at lysine-25. Mutation of K25 abolishes ubiquitination and increases protein stability. G0S2 protein is stabilized by ATGL expression and by fatty acid-induced triglyceride accumulation through distinct mechanisms. G0S2 protein levels are reduced in adipose tissue of ATGL-deficient mice. |
Site-directed mutagenesis of K25, ubiquitination assays, proteasome inhibitor treatment, co-expression with ATGL, fatty acid treatment, ATGL-knockout mouse adipose tissue analysis |
PloS one |
High |
27248498
|
| 2016 |
G0S2 suppresses oncogene-induced transformation independently of ATGL inhibition. G0s2-null MEFs are readily transformed by HRAS or EGFR; restoration of G0S2 reverses HRAS-driven transformation. Gene expression analysis reveals upregulation of MYC target signatures in G0s2-null MEFs; RNAi or pharmacologic inhibition of MYC abrogates transformation. |
G0s2-null MEFs, oncogene transformation assays (HRAS, EGFR), G0S2 rescue expression, gene expression profiling, MYC RNAi and pharmacologic inhibition |
Cancer research |
Medium |
26837760
|
| 2016 |
During ATRA-induced APL differentiation, PML/RARα is recruited to the G0S2 promoter in an ATRA-dependent (ligand-dependent) manner and cooperates physically and functionally with C/EBPε (specifically the p30 isoform) to activate G0S2 transcription. ChIP-qPCR demonstrated co-occupancy of PML/RARα and C/EBPε at the G0S2 promoter. |
Chromatin immunoprecipitation (ChIP)-qPCR in NB4 and PR9 cell lines and primary APL cells, co-immunoprecipitation of PML/RARα and C/EBPε, ATRA treatment |
Journal of leukocyte biology |
Medium |
27605212
|
| 2019 |
G0S2 possesses an intrinsic lysophosphatidic acid acyltransferase (LPAAT) enzymatic activity, directly catalyzing phosphatidic acid synthesis from lysophosphatidic acid and acyl-CoA. A distinct 4-amino acid motif is required for this LPAAT activity. Knockdown of G0S2 in ATGL-deficient mice still decreases hepatic TG content, and overexpression of G0S2 promotes fatty acid incorporation into TGs even in ATGL-deficient hepatocytes, demonstrating a lipolysis-independent TG synthesis function. |
In vitro LPAAT activity assay, deletion mutagenesis of 4-aa motif, overexpression/knockdown in ATGL-deficient mice and hepatocytes, isotopic fatty acid incorporation assays |
FASEB journal : official publication of the Federation of American Societies for Experimental Biology |
High |
30802154
|
| 2019 |
G0S2 inhibits ATGL via non-competitive inhibition by interacting with ATGL's patatin domain. G0S2 inhibition of ATGL reduces lipid droplet turnover and, in glioma stem-like cells, attenuates RNF168-mediated 53BP1 ubiquitination through mTOR-S6K signaling activation and increased 53BP1 protein stability, thereby enhancing DNA repair and radioresistance. |
G0S2 knockdown/overexpression in GSCs, lipid droplet immunofluorescence, γ-H2AX foci assay, mTOR/S6K pathway analysis, 53BP1 ubiquitination assay, xenograft survival experiments |
Journal of experimental & clinical cancer research : CR |
Medium |
30953555
|
| 2020 |
In zebrafish, G0s2 functions as a positive regulator of oxidative phosphorylation (OXPHOS) and maintains intra-mitochondrial ATP concentration under hypoxia. TALEN-mediated g0s2 knockout abolishes hypoxic tolerance in zebrafish hearts, while cardiomyocyte-specific overexpression confers strong ischemic tolerance. In vivo FRET-based ATP biosensor imaging showed that g0s2-expressing cardiomyocytes maintain ATP production and contractility during hypoxia. |
TALEN knockout zebrafish, cardiomyocyte-specific transgenic zebrafish, in vivo mitochondria-targeted FRET ATP biosensor imaging, mosaic overexpression model |
FASEB journal : official publication of the Federation of American Societies for Experimental Biology |
High |
31916304
|
| 2015 |
G0S2 inhibits energy production by oxidative phosphorylation in naïve CD8+ T cells. G0S2-null naïve CD8+ T cells display increased basal and spare respiratory capacity associated with increased AMPK-α phosphorylation, not increased mitochondrial biogenesis. G0S2 expression in naïve T cells is suppressed downstream of TCR activation via MAPK, calcium/calmodulin, PI3K, and mTOR pathways. |
G0s2-null mice, Seahorse respirometry, mitochondrial biogenesis markers, AMPK phosphorylation analysis, T cell activation assays, in vivo lymphopenia-induced proliferation |
Immunology and cell biology |
Medium |
25666096
|
| 2022 |
The minimal sequence of G0S2 required for ATGL inhibition spans amino acids 20–44, containing a hydrophobic region. Residues Y27, V28, G30, A34, G37, V39, and L42 play substantial roles in ATGL inhibition. N-terminal extensions (aa 20–27) facilitate non-specific interactions that increase binding to ATGL. Full-length G0S2 shows greater tolerance to single amino acid exchanges due to stronger contributions of these flanking interactions. |
Site-directed mutagenesis, truncation analysis, in vitro ATGL lipase activity assays, binding assays with G0S2 variants |
Biochimica et biophysica acta. Molecular and cell biology of lipids |
High |
35026402
|
| 2022 |
ATGL-independent localization of G0S2 to both the endoplasmic reticulum (ER) and lipid droplets (LDs) is mediated by a hairpin structure consisting of two hydrophobic sequences. Positively charged residues in the hinge region of this hairpin sort G0S2 from ER to LDs. When ATGL is co-expressed, the role of these positive charges in LD sorting becomes dispensable. |
Structural prediction, cell imaging with fluorescent-tagged constructs, mutagenesis of hydrophobic sequences and charged residues, co-expression with ATGL |
Journal of cell science |
Medium |
36420951
|
| 2014 |
TNF-α reduces G0S2 expression in adipocytes through proteasomal degradation of PPARγ, which abolishes PPARγ binding to the G0S2 promoter. Proteasome inhibition (MG-132) maintains PPARγ levels and preserves G0S2 expression. Overexpression of G0S2 or PPARγ partially reverses TNF-α-induced lipolysis. |
3T3-L1 adipocyte differentiation, TNF-α treatment, proteasome inhibitor MG-132, ChIP assay for PPARγ binding to G0S2 promoter, G0S2 and PPARγ overexpression, lipolysis assays |
Cytokine |
Medium |
24993166
|
| 2023 |
JAZF1 represses G0S2 transcription in human endometrial stromal cells (hESCs) by interacting with the G0S2 transcriptional activator Purβ, restricting its activity. JAZF1 depletion leads to increased G0S2 expression, apoptosis, and defective decidualization. G0S2 was identified as a key driver of hESC apoptosis in this context. |
JAZF1 siRNA/overexpression in hESCs, G0S2 promoter analysis, co-immunoprecipitation of JAZF1 with Purβ, decidualization assays, apoptosis assays, patient tissue analysis |
Communications biology |
Medium |
37244968
|
| 2025 |
Genetic ablation of G0S2 in mice completely abolishes diet-induced hypertriglyceridemia and attenuates atherogenesis by enhancing whole-body triglyceride clearance. G0S2 deletion increases circulating LPL concentration and activity predominantly from white adipose tissue (WAT), and enhances LPL protein stability in adipocytes. This effect is reversed by ATGL inhibition, linking intracellular ATGL activity (regulated by G0S2) to extracellular LPL-mediated lipolysis. WAT transplantation from G0S2-deficient mice normalizes plasma TG levels in hypertriglyceridemic mice. |
G0S2 global knockout mice, WAT transplantation, LPL activity and concentration measurement, ATGL inhibitor treatment, dietary lipid challenge, atherosclerosis assessment |
The Journal of clinical investigation |
High |
40100923
|
| 2025 |
In a mouse model of brain-evoked catabolism of all adipose depots, downregulation of G0s2 (along with Acvr1c and Npr3) is part of the cell-autonomous lipolytic inhibitor suppression that activates catecholamine-independent lipolysis, enabling mobilization of stable adipose stores including bone marrow adipose tissue. This process requires ATGL-dependent lipolysis. |
Genetic, surgical, and chemical intervention mouse models; adipose-specific gene expression analysis; G0s2 expression profiling during cachexia/starvation models |
bioRxivpreprint |
Low |
bio_10.1101_2024.07.30.605812
|