| 2020 |
G3BP1 functions as a molecular switch that triggers RNA-dependent liquid-liquid phase separation (LLPS) to assemble stress granules. Three distinct intrinsically disordered regions (IDRs) regulate its intrinsic propensity for LLPS, and phosphorylation within these IDRs fine-tunes this regulation. Extrinsic G3BP1-binding factors (e.g., Caprin1 promotes, USP10 inhibits) modulate SG assembly through positive or negative cooperativity. |
In vitro LLPS reconstitution, phase separation assays, mutagenesis of IDRs and phosphorylation sites, RNA-binding experiments |
Cell |
High |
32302571
|
| 2020 |
Under non-stress conditions, G3BP1 adopts a compact auto-inhibited state stabilized by electrostatic intramolecular interactions between intrinsically disordered acidic tracts and the positively charged arginine-rich region. Upon release of mRNAs from polysomes during stress, unfolded mRNAs outcompete G3BP auto-inhibitory interactions, inducing a conformational transition that facilitates G3BP clustering through protein-RNA interactions and drives RNA/protein condensate formation. |
FRET, NMR, in vitro RNA competition assays, mutagenesis, live-cell imaging |
Cell |
High |
32302572
|
| 2016 |
G3BP1 and G3BP2 double knockout abolishes SG formation in response to eIF2α phosphorylation or eIF4A inhibition. Caprin1 binding to G3BP1 promotes SG formation whereas USP10 binding inhibits SG formation; these interactions are mutually exclusive at G3BP1. G3BP1 interacts with 40S ribosomal subunits through its RGG motif, required for SG-mediated condensation. Phosphomimetic G3BP1-S149E fails to rescue SG formation. |
CRISPR/KO cell lines, rescue with G3BP1 mutants (S149E, F33W), Co-IP, ribosome fractionation |
The Journal of cell biology |
High |
27022092
|
| 2021 |
Stress granule disassembly after heat shock specifically requires ubiquitination of G3BP1. Ubiquitinated G3BP1 interacts with the ER-associated protein FAF2, which engages the ubiquitin-dependent segregase p97/VCP, targeting the stress granule interaction network for disassembly. |
Cultured human cells, ubiquitination assays, Co-IP of G3BP1 with FAF2 and p97/VCP, G3BP1 ubiquitination mutants |
Science |
High |
34739333
|
| 2018 |
G3BP1 physically interacts with cGAS and promotes formation of large cGAS complexes that enhance cGAS DNA binding and cGAS-dependent interferon production. G3BP1 deficiency leads to inefficient DNA binding by cGAS. The small molecule EGCG disrupts G3BP1-cGAS complexes and inhibits DNA-triggered cGAS activation. |
Co-IP, G3BP1 knockdown/KO cells, IFN production assays, in vivo mouse model (AGS) |
Nature immunology |
High |
30510222
|
| 2001 |
G3BP is a phosphorylation-dependent endoribonuclease that cleaves between cytosine and adenine (CA) via its C-terminal RRM-type RNA binding motif. Phosphorylation at serine 149 controls its subcellular localization: a S149A mutant remains exclusively cytoplasmic whereas a phosphomimetic S149E mutant translocates to the nucleus. G3BP is tightly associated with c-myc mRNA in mouse embryonic fibroblasts, and c-myc mRNA decay is delayed in RasGAP-deficient fibroblasts lacking properly phosphorylated G3BP. |
In vitro endoribonuclease assay, RNA binding/cleavage specificity mapping, site-directed mutagenesis (S149A and S149E), subcellular fractionation, mRNA stability assays |
Molecular and cellular biology |
High |
11604510
|
| 1999 |
G3BP1 (HDH VIII) functions as a DNA and RNA helicase with ATP- and Mg2+-dependent activity. It prefers partially unwound 3'-tailed substrates, moves along the bound strand in the 5' to 3' direction, and can unwind partial RNA/DNA and RNA/RNA duplexes. The RGG-box-rich C-terminal domain is analogous to that of other DNA/RNA helicases. |
Biochemical purification from HeLa nuclear extract, in vitro helicase assay, microsequencing |
Nucleic acids research |
High |
9889278
|
| 2016 |
G3BP1 arginine residues in its RGG domain are asymmetrically dimethylated by PRMT1 and symmetrically methylated by PRMT5. Increased arginine methylation represses SG assembly, while decreased methylation promotes it. Arsenite stress rapidly and reversibly decreases asymmetric arginine methylation on G3BP1, acting as a regulatory signal for SG formation. |
Methylation-specific antibodies, PRMT1/PRMT5 knockdown/overexpression, in vitro methylation assay, SG formation assays |
The Journal of biological chemistry |
High |
27601476
|
| 2007 |
Caprin-1 interacts with G3BP-1 via a conserved F(M/I/L)Q(D/E)Sx(I/L)D motif in Caprin-1 that binds the NTF2-like domain of G3BP-1. Caprin-1 and G3BP-1 co-localize in cytoplasmic RNA granules. The carboxy-terminal RGG motifs of Caprin-1 selectively bind c-Myc and cyclin D2 mRNAs. Caprin-1-mediated induction of eIF2α phosphorylation requires its mRNA-binding ability. |
Mutagenesis of Caprin-1 motifs, GST pulldown, co-immunoprecipitation, confocal microscopy, eIF2α phosphorylation assays |
Molecular and cellular biology |
High |
17210633
|
| 2015 |
G3BP1 directly interacts with inactive PKR through both the NTF2-like and PXXP domains of G3BP1. Caprin1 also directly interacts with PKR and is required for efficient PKR activation at stress granules and release of active PKR into the cytoplasm. The G3BP1-Caprin1-PKR complex represents a mode of PKR activation independent of dsRNA pattern recognition, and the PXXP domain of G3BP1 is essential for PKR recruitment to SGs, eIF2α phosphorylation, and antiviral activity. |
Direct binding assays, Co-IP, G3BP1 domain deletion mutants, PKR activation assay (eIF2α phosphorylation), viral infection assays |
mBio |
High |
25784705
|
| 2015 |
Viral proteins (e.g., SFV nsP3) and the cellular protein USP10 inhibit SG assembly via FGDF motifs that bind the NTF2-like domain of G3BP1. Both phenylalanine residues and the glycine in the FGDF motif are essential for binding. A crystal structure model of G3BP1-NTF2 bound to an FGDF-containing peptide was generated, revealing the binding mode. |
Mutagenesis of FGDF motifs, pulldown, SG formation assays, crystallographic modeling |
PLoS pathogens |
High |
25658430
|
| 2022 |
The NTF2-like domain of G3BP1 contains a conserved surface groove targeted by SARS-CoV-2 nucleocapsid (N) protein residues 1-25 via a φ-x-F motif. Crystal structure of G3BP1-NTF2 in complex with N1-25 peptide revealed surface complementarity. Mutation of key interaction residues disrupts the G3BP1-N interaction in vitro. |
X-ray crystallography, isothermal titration calorimetry, mutagenesis, pulldown assays |
Journal of molecular biology |
High |
35240128
|
| 2019 |
Acetylation of G3BP1 at lysine-376 (K376) within the RRM RNA-binding domain impairs RNA binding and disrupts RNA-dependent interaction with PABP1 (but not RNA-independent interactions with Caprin-1 or USP10). K376 acetylation is regulated by HDAC6 (eraser) and CBP/p300 (writer). Acetylated G3BP1 is detected outside SGs and increases during SG resolution, suggesting it facilitates SG disassembly. |
Acetylation-mimicking (K376Q) and deacetylation-mimicking (K376R) mutants, RNA binding assays, Co-IP, SG formation/dissolution assays, HDAC6/CBP overexpression and knockdown |
Molecular and cellular biology |
High |
31481451
|
| 2020 |
G3BP1 is required for mRNA decay of transcripts with highly structured 3' UTRs (structure-mediated RNA decay), functioning with UPF1. Depletion of G3BP1 increases steady-state levels of mRNAs with highly structured 3' UTRs and highly structured circular RNAs. |
RNA-seq, G3BP1 knockdown, 3' UTR structural manipulation, half-life assays |
Molecular cell |
Medium |
32017897
|
| 2018 |
G3BP1 directly binds to multiple sequences of the FMDV IRES element via its C-terminal region and interacts directly with polypyrimidine tract-binding protein and eIF4B. G3BP1 reduces local flexibility of the IRES element and negatively regulates both cap-dependent and IRES-dependent translation. G3BP1 is cleaved by FMDV 3C protease at E284. |
RNA EMSA, in vitro translation assays, Co-IP, FMDV infection with G3BP1 mutants |
The FEBS journal |
Medium |
28755480
|
| 2012 |
G3BP2 forms homo-multimers and hetero-multimers with G3BP1. Double knockdown of G3BP1 and G3BP2 significantly reduces SG formation, whereas single knockdown of either partially reduces it. Overexpression of G3BP2 alone can induce SGs without stress, similar to G3BP1. |
siRNA knockdown, Co-IP for heterodimerization, SG formation assays (arsenite, hypoxia, heat shock) |
Genes to cells |
Medium |
23279204
|
| 2012 |
Assembly of large G3BP-induced stress granules (but not small granules) precedes and triggers eIF2α phosphorylation via PKR. Stress granule size acts as a threshold switch for PKR-mediated eIF2α phosphorylation and translational repression. |
G3BP overexpression, MEF cells with eIF2α kinase knockouts, PKR-specific inhibition, eIF2α phosphorylation assays, SG size quantification |
Molecular biology of the cell |
Medium |
22833567
|
| 2010 |
G3BP1 directly interacts with the 3' UTR of beta-F1-ATPase mRNA via its RRM domain (confirmed by RNA-bridged trimolecular fluorescence complementation). G3BP1 interaction with beta-F1 mRNA inhibits its translation at the initiation level. This RNP complex localizes to the periphery of mitochondria. |
Affinity chromatography, Co-IP, RNA FISH, TriFC assay, polysome profiling, immunoelectron microscopy |
Journal of cell science |
Medium |
20663914
|
| 2018 |
G3BP1 binds to RIG-I via its C-terminal RGG domain and directly binds viral dsRNA/poly(I:C) also via the RGG domain. G3BP1 overexpression enhances RIG-I-induced IFN-β production, and G3BP1 co-localizes with RIG-I and infecting VSV in cells. |
Co-IP, biotin-labeled dsRNA pulldown, in vitro translated G3BP1 binding assay, confocal microscopy, IFN-β reporter assay |
The Journal of biological chemistry |
Medium |
30804210
|
| 2019 |
G3BP1 forms a complex with RNF125 and RIG-I; this interaction leads to auto-ubiquitination of RNF125 and thereby reduced RNF125-mediated degradation of RIG-I, promoting RIG-I expression and antiviral signaling. |
Co-IP of G3BP1-RNF125-RIG-I complex, ubiquitination assays, G3BP1 KO cells, viral replication assays |
Cell death & disease |
Medium |
31827077
|
| 2014 |
G3BP1 recruits PKR to stress granules via its PXXP domain. The G3BP1-SG-PKR axis links SG formation to innate immune transcriptional responses through NF-κB and JNK. Truncated G3BP1 unable to form SGs lacks antiviral activity against enteroviruses. |
G3BP1 domain deletion mutants, SG formation assays, PKR Co-IP, NF-κB/JNK reporter assays, viral replication assays |
Journal of virology |
Medium |
25520508
|
| 2015 |
G3BP1 depletion or its upstream regulator TDP-43 disturbs normal interactions between stress granules and processing bodies (PBs), reducing SG-PB docking and impairing preservation of polyadenylated mRNA. Reintroduction of G3BP1 alone rescues SG-PB interactions and mRNA preservation. |
G3BP1 siRNA, TDP-43 siRNA, live-cell imaging of SG-PB interactions, mRNA stability assays, G3BP1 rescue experiments |
The Journal of cell biology |
Medium |
25847539
|
| 2018 |
In axons, G3BP1 forms stress granule-like structures that co-localize with stored axonal mRNAs and limit their translation. Upon axotomy, G3BP1 granules disassemble (associated with increased phospho-G3BP1), releasing mRNAs for local translation to support axon regeneration. Dominant-negative G3BP disrupts axonal SG-like structures, activates intra-axonal translation, increases axon growth, and accelerates nerve regeneration in vivo. |
Dominant-negative G3BP overexpression, G3BP1 co-localization with axonal mRNAs by FISH, phospho-G3BP1 immunostaining, nerve regeneration in rat in vivo model |
Nature communications |
Medium |
30135423
|
| 2020 |
CK2α phosphorylates G3BP1 at Ser149 in axons after injury. Phosphomimetic G3BP1 shows markedly decreased RNA binding in neurons compared to wild-type and non-phosphorylatable G3BP1, releasing axonal mRNAs for translation. CK2α translation itself is regulated by local mTOR-dependent translation and axoplasmic Ca2+ levels. |
In vitro kinase assay, phosphomimetic/non-phosphorylatable G3BP1 mutants, RNA binding assay, dual FRAP reporter for axonal translation, CK2α mRNA depletion from axons |
Current biology |
Medium |
33065005
|
| 2023 |
TRIM21 E3 ubiquitin ligase catalyzes K63-linked ubiquitination of G3BP1, which inhibits G3BP1 LLPS in vitro and promotes SG dissolution. Autophagy receptors SQSTM1/p62 and CALCOCO2/NDP52 directly interact with G3BP1 at SG periphery to mediate SG elimination via autophagy. |
E3 ligase screen, in vitro ubiquitination assay, LLPS assay with ubiquitinated G3BP1, Co-IP of G3BP1 with p62/NDP52, SG formation/elimination assays in KO cells |
Autophagy |
Medium |
36692217
|
| 2023 |
SIRT2 deacetylates G3BP1 at K257, K276, and K376, leading to disassembly of the cGAS-G3BP1 complex, thereby inhibiting cGAS DNA binding, cGAS droplet formation, and type I IFN production. SIRT2 deficiency elevates IFN expression after HSV-1 infection. |
Co-IP of SIRT2-G3BP1, in vitro deacetylation assay, acetylation site mapping, cGAS-G3BP1 complex disruption assay, cGAS DNA binding and LLPS assays, SIRT2 KO mouse model |
EMBO reports |
Medium |
37870259
|
| 2020 |
G3BP1 promotes pre-condensation of cGAS into a primary liquid-phase state in resting cells, enabling more efficient DNA-induced LLPS and rapid cGAS activation. RNA does not activate cGAS and upon DNA challenge, G3BP1 dissociates from cGAS, allowing full cGAS-DNA condensation. |
High-resolution microscopy, G3BP1 KO cells, cGAS LLPS assays, G3BP1 inhibition, DNA vs. RNA stimulation experiments |
EMBO reports |
Medium |
34779554
|
| 2020 |
MAGE-B2 suppresses SG formation by reducing G3BP1 protein levels below the critical concentration for phase separation through translational inhibition of G3BP1. Knockout of the MAGE-B2 mouse ortholog or overexpression of G3BP1 confers hypersensitivity of the male germline to heat stress in vivo. |
MAGE-B2 KO mice, G3BP1 overexpression in vivo, polysome profiling (translational inhibition), SG formation assays, heat stress survival |
Molecular cell |
Medium |
32692974
|
| 2010 |
MK-STYX (a pseudophosphatase) interacts with G3BP1 and inhibits G3BP1-induced SG formation. The catalytically active mutant of MK-STYX shows dramatically reduced G3BP1 binding and impaired ability to inhibit SG assembly, indicating the inactive phosphatase conformation is required for G3BP1 interaction. |
Mass spectrometry identification, Co-IP, G3BP1-induced SG formation assays with MK-STYX wild-type and active-site mutant |
The Biochemical journal |
Medium |
20180778
|
| 2007 |
G3BP1 and G3BP2 bind to p53 in vitro and in vivo. G3BP1/2 expression leads to redistribution of p53 from the nucleus to the cytoplasm. G3BP2 (but not G3BP1) additionally associates with MDM2, stabilizes MDM2, and reduces MDM2-mediated p53 ubiquitylation and degradation. |
Proteomic pulldown, Co-IP in cells, subcellular fractionation, ubiquitylation assay, shRNA knockdown |
Oncogene |
Medium |
17297477
|
| 2011 |
G3BP binds to BART mRNA and degrades it via its endoribonuclease activity. Intracellular CD24 interacts with G3BP in stress granules and inhibits G3BP's specific endoribonuclease activity toward BART mRNA, leading to increased BART expression and reduced cell invasion. |
Co-IP of CD24-G3BP complex, mRNA stability/RNase assays, CD24 knockdown, in vivo orthotopic xenograft model |
Cancer research |
Medium |
21266361
|
| 2020 |
PRMT8 methylates G3BP1 (the dendritic RNA-binding protein) at arginine residues and suppresses Rac1-PAK1 signaling to control actin cytoskeleton dynamics for dendritic spine maturation. PRMT8 depletion leads to overabundance of filopodia and mis-localization of excitatory synapses. |
PRMT8 KD in neurons, co-IP of PRMT8-G3BP1, in vitro methylation assay, Rac1-PAK1 activity assay, spine morphology imaging |
Cell reports |
Medium |
32521269
|
| 2019 |
eIF4GI is critical for canonical SG formation by directly interacting with G3BP via amino acids 182-203 of eIF4GI and the RNA-binding domain of G3BP. Picornavirus 2A or L proteases block SG formation by disrupting eIF4GI-G3BP1 interaction. |
Co-IP, domain deletion mapping, rescue of SG formation by eIF4GI, 2A/L protease cleavage assay |
Cell discovery |
Medium |
30603102
|
| 2021 |
G3BP1 interacts with and inactivates GSK-3β (via Co-IP), suppressing GSK-3β-mediated β-catenin phosphorylation and degradation. Elevated G3BP1 stabilizes β-catenin by inhibiting its ubiquitin-proteasome degradation, promoting nuclear accumulation of β-catenin and cell proliferation. |
Co-IP of G3BP1-GSK-3β, β-catenin ubiquitination assay, pharmacological disruption of G3BP1-GSK-3β interaction, G3BP1 overexpression/knockdown |
Acta pharmacologica Sinica |
Low |
33536604
|
| 2021 |
G3BP1 interacts with SPOP and functions as a competitive inhibitor of the Cul3-SPOP E3 ubiquitin ligase. Elevated G3BP1 disables Cul3-SPOP activity, promoting AR signaling. AR directly upregulates G3BP1 transcription in a feed-forward manner. |
Co-IP of G3BP1-SPOP, competitive inhibition assay, transcriptomic analysis of AR targets, AR ChIP at G3BP1 promoter |
Nature communications |
Medium |
34795264
|
| 2020 |
G3BP1 coordinates lysophagy activity at lysosomes via a G3BP1/TSC2 complex. Dysfunction of the G3BP1/TSC2 complex accelerates lysosomal damage and ferroptosis via mTOR pathway dysregulation. |
Co-IP of G3BP1-TSC2, G3BP1 KD in nucleus pulposus cells, lysosomal damage assays, mTOR inhibition rescue, in vivo IDD model |
Cell proliferation |
Low |
36450665
|
| 2023 |
G3BP1 stabilizes IRP2 protein by binding to and suppressing translation of FBXL5 mRNA (encoding the E3 ligase component that ubiquitinates IRP2). This G3BP1-FBXL5-IRP2 axis elevates cellular labile iron and mediates arsenite-induced ferroptotic cell death. |
G3BP1 KO cells, RIP for G3BP1-FBXL5 mRNA interaction, polysome profiling, IRP2 stability assays, ferroptosis assays, in vivo kidney injury model |
Journal of hazardous materials |
Medium |
38118197
|
| 2021 |
TDP-43 stabilizes G3BP1 transcripts by directly binding a conserved cis regulatory element in the G3BP1 3' UTR. Nuclear TDP-43 depletion is sufficient to reduce G3BP1 protein levels in vitro and in vivo. In ALS/FTD patient neurons with TDP-43 cytoplasmic inclusions/nuclear depletion, G3BP1 transcripts are reduced. |
CLIP-seq (TDP-43 binding to G3BP1 3'UTR), mRNA stability assays, conditional TDP-43 KO in vivo, patient neuron analysis |
Brain |
Medium |
34115105
|
| 2016 |
Immunopurified G3BP1 complex from mouse brain contains USP10, CtBP1, Caprin-1, G3BP2a, and PSF. This complex preferentially binds intron-retaining transcripts and 3' UTRs. G3BP1 depletion in mouse cerebellum decreases intron retention, including for Grm5 (metabotropic glutamate receptor 5) mRNA. |
Immunopurification of G3BP1 complex, CLIP-seq, G3BP1 KO mice with RNA-seq for intron retention |
Journal of neurochemistry |
Medium |
27513819
|
| 2024 |
G3BP1 preferentially binds unfolded RNA and drives assembly of RNP granule-like condensates that establish RNA-RNA interactions. These RNA-RNA interactions limit mobility and translatability of sequestered mRNAs. The DEAD-box helicase DDX3X resolves these RNA-RNA interactions inside condensates, rendering them dynamic and enabling mRNA translation; disease-associated catalytically inactive DDX3X variants fail to resolve RNA-RNA interactions. |
In vitro condensate/LLPS reconstitution, RNA mobility assays, translation assays with condensate-sequestered mRNAs, DDX3X WT vs. disease mutants |
Molecular cell |
High |
39729994
|
| 2024 |
G3BP1 promotes intermolecular RNA-RNA interactions that stabilize RNA condensates and is a 'condensate chaperone' for initial granule assembly. After initial condensation, G3BP1 is dispensable for the RNA component of granules to persist in vitro and in cells when RNA decondensers are inactivated, demonstrating that RNA condensates can persist without G3BP1 once formed. |
In vitro RNA condensation assays, G3BP1 depletion in cells, inactivation of RNA decondensers (DCP1a, XRN1), FRAP, RNA-only granule persistence assays |
Molecular cell |
High |
39637853
|
| 2024 |
G3BP1-dependent condensation of viral RNAs (West Nile virus, Zika virus, SARS-CoV-2) antagonizes viral replication by condensing untranslating viral mRNPs. G3BP1-dependent RNA condensation disrupts viral replication organelles and viral RNA replication. G3BP1 does not generally alter innate immune pathway activation. Viruses counteract this by inhibiting G3BP1 RNA condensing activity, hijacking eIF4A decondensing activity, or maintaining efficient translation. |
G3BP1 KO cells, viral RNA condensation assays, viral replication organelle imaging, innate immune pathway reporter assays, eIF4A inhibition experiments |
Science advances |
Medium |
38295168
|
| 2024 |
SARS-CoV-2 nucleocapsid (N) protein interacts with G3BP1/2 via the F17 residue in an ITFG motif. N-F17A mutation causes specific loss of G3BP1/2 interaction, fails to inhibit SG assembly, shows decreased viral replication in cells, and causes decreased pathology in vivo. Mechanistically, the G3BP1-N interaction promotes infection by limiting sequestration of viral genomic RNA into stress granules. |
Structure-guided mutagenesis, Co-IP, SG formation assays, viral replication in cells, in vivo mouse infection model |
Cell reports |
High |
38492217
|
| 2023 |
Gadd45β promotes G3BP1-mediated SG formation by directly interacting with the RNA-binding domain of G3BP1, dissolving G3BP1's autoinhibitory electrostatic intramolecular interaction and inducing conformational expansion. The acidic loop 1 and RNA-binding properties of Gadd45β increase RNA-binding affinity of the G3BP1-Gadd45β complex, promoting SG assembly and RLR-mediated interferon signaling. |
Co-IP, FRET/structural analysis of G3BP1 conformation, RNA binding assays, Gadd45β KO mice, viral infection |
Cell reports |
Medium |
37917584
|
| 2021 |
G3BP1 binds guanine quadruplex (rG4) structures in mRNAs directly via its C-terminal RGG domain (enhanced by RRM domain). Pyridostatin (rG4 ligand) displaces G3BP1 from mRNA 3' UTRs in cells. G3BP1 positively regulates mRNA stability through its rG4-binding activity (luciferase reporter assay). |
eCLIP-seq bioinformatics, in vitro rG4 binding assay, seCLIP-seq with pyridostatin treatment, luciferase reporter for mRNA stability |
Nucleic acids research |
Medium |
34614161
|
| 2023 |
DCAF7 serves as a scaffold protein facilitating interaction between USP10 and G3BP1, leading to removal of K48-linked ubiquitin from Lys76 of G3BP1, preventing its proteasomal degradation and promoting SG-like structure formation and chemoresistance. |
Co-IP of DCAF7-USP10-G3BP1 complex, ubiquitination site mapping (K76), SG formation assays, G3BP1 knockdown rescue |
Advanced science |
Medium |
38973296
|
| 2023 |
SERBP1 interacts with G3BP1 and recruits 26S proteasome subunits (PSMD10, PSMA3) to SGs. SERBP1 depletion reduces 20S proteasome activity at SGs, mislocalizes VCP/FAF2, and diminishes K63-linked polyubiquitination of G3BP1 during SG recovery, impairing SG clearance. |
Co-IP of SERBP1-G3BP1-proteasome complex, proteasome activity assay, ubiquitination assay, SERBP1 KD with SG clearance readout, in vivo heat stress in testes |
Research |
Low |
37223481
|
| 2020 |
G3BP1 is required for activation of the senescence-associated secretory phenotype (SASP) by promoting association of cGAS with cytosolic chromatin fragments during senescence. Through cGAS, G3BP1 activates the NF-κB and STAT3 pathways to promote SASP expression. G3BP1 depletion or pharmacological inhibition impairs the cGAS pathway and prevents SASP expression without affecting senescence commitment itself. |
G3BP1 KD/inhibition, cGAS-chromatin fragment Co-IP, NF-κB/STAT3 pathway readouts, in vitro and in vivo tumor growth assays |
Nature communications |
Medium |
33020468
|
| 2004 |
G3BP-1 and HuD proteins associate in an RNA-dependent manner in differentiated P19 neuronal cells. IMP-1 associates with both HuD and G3BP-1 in an RNA-dependent manner and binds directly to tau mRNA, placing G3BP-1 in a tau mRNA-containing RNP granule complex. |
GST-HuD fusion pulldown from P19 cell lysates, Co-IP, RNA-dependent complex analysis, tau mRNA binding assay |
Journal of neurochemistry |
Low |
15086518
|
| 2011 |
TDP-43 regulates the levels of G3BP mRNA (a SG nucleating factor). Disease-associated mutation TDP-43(R361S) is a loss-of-function mutation with respect to SG formation and alters G3BP and TIA-1 levels, while TDP-43(D169G) does not impact this pathway. |
TDP-43 KD, mRNA level analysis, TDP-43 mutant overexpression, SG formation assays |
Human molecular genetics |
Low |
21257637
|
| 2002 |
Heregulin β1 (HRG) stimulation induces G3BP ATPase activity, promotes its phosphorylation (increasing association with GTPase-activating protein), and causes G3BP translocation to the nucleus where it co-localizes with acetylated histone H3 (active transcription sites). These effects are blocked by the HER2 antibody Herceptin. |
ATPase assay, Co-IP (G3BP-GAP), subcellular fractionation/immunofluorescence, Herceptin inhibition |
Cancer research |
Low |
11888885
|
| 2001 |
G3BP promotes S phase entry in serum-deprived fibroblasts. This function is dependent on the presence of the RNA-binding domain of G3BP. |
G3BP overexpression in fibroblasts, RNA-binding domain deletion mutant, cell cycle analysis (S phase entry) |
Cancer letters |
Low |
11146228
|
| 2023 |
Crystal structure of G3BP1-NTF2 in complex with a Caprin-1-derived short linear motif (SLiM) was solved. Caprin-1 interacts with His-31 and His-62 of G3BP1-NTF2 at a third binding site distinct from those used by USP10. G3BP1-NTF2 is destabilized at acidic pH, an effect counterbalanced better by USP10 than Caprin-1, suggesting pH modulates competitive binding. SG condensates are acidified ~0.5 pH units relative to cytosol. |
X-ray crystallography, nano-DSF, biophysical binding assays, ratiometric pH fluorescence imaging in cells |
Open biology |
High |
37161291
|