| 2008 |
RBCK1 functions as an E3 ubiquitin ligase that catalyzes K48-linked ubiquitination and proteasomal degradation of IRF3, acting as a negative feedback regulator of virus-triggered type I interferon induction. |
Overexpression and knockdown experiments, ubiquitination assays, plaque assays, viral infection-induced RBCK1 induction demonstrated |
Cell research |
High |
18711448
|
| 2007 |
RBCK1 physically interacts with TAB2 and TAB3 adaptor proteins and facilitates their proteasome-dependent degradation, thereby negatively regulating TNF- and IL-1-triggered NF-κB activation. |
Co-immunoprecipitation, overexpression, RNAi knockdown, proteasome inhibitor (MG-132) rescue, NF-κB reporter assays |
The Journal of biological chemistry |
High |
17449468
|
| 2008 |
RBCK1 possesses intrinsic E3 ubiquitin ligase activity (self-ubiquitination in vitro) that is inhibited by interaction with its splice variant RBCK2 (which lacks the RING-IBR domain) and by phosphorylation by PKCβ. |
In vitro ubiquitination assay, coexpression studies, PKCβ phosphorylation assay, proteasomal degradation rescue |
The Journal of biological chemistry |
High |
18303026
|
| 1998 |
RBCK1 has transcriptional activation activity requiring both its RING-finger and B-Box motifs; PKA enhances this activity ~8-fold while MEK1 and MEKK1 repress it. |
GAL4 chimeric transcription regulator system, deletion/mutant constructs, kinase co-expression |
Biochemical and biophysical research communications |
Medium |
9642138
|
| 1998 |
RBCK2, a splice variant of RBCK1 lacking the RING-IBR domain, forms a hetero-oligomeric complex with RBCK1 and inhibits its transcriptional activity; RBCK1 homo- and hetero-dimerizes but RBCK2 does not self-interact. |
In vitro interaction assays, GAL4 transcription reporter system, analysis of alternative splicing |
FEBS letters |
Medium |
9755849
|
| 2005 |
RBCK1 shuttles between cytoplasm and nucleus via an N-terminal nuclear export signal (Leu-142/145) and a C-terminal RING-IBR nuclear localization signal; in the nucleus it localizes to nuclear bodies and interacts with CBP (enhancing transcription) and PML (repressing CBP-enhanced activity). |
Leptomycin B treatment, mutational analysis of NES/NLS, nuclear body co-localization, co-immunoprecipitation with CBP and PML, transcriptional reporter assays |
The Journal of biological chemistry |
High |
15833741
|
| 2005 |
RBCK2 (RING-lacking splice variant) tethers RBCK1 in the cytoplasm by forming a hetero-oligomeric complex, relocating even NES-disrupted RBCK1 from nucleus to cytoplasm. |
Subcellular localization assays, co-expression of NES-disrupted RBCK1 with RBCK2, fluorescence microscopy |
Biochemical and biophysical research communications |
Medium |
16083853
|
| 2006 |
RBCK1 physically associates with PKCβI in cardiac myocytes; this interaction increases upon phenylephrine stimulation, and RBCK1-mediated hypertrophy requires PKCβ activity, establishing RBCK1 as a key regulator of PKCβI function in cardiac hypertrophy. |
Co-immunoprecipitation in neonatal myocytes, adenovirus-based overexpression, PKCβ-selective antagonists, RNAi knockdown with cell size measurement |
The Journal of biological chemistry |
High |
17121852
|
| 2010 |
RBCK1 promotes ERα-positive breast cancer cell cycle progression by driving transcription of ERα and cyclin B1; it is recruited to the ERα promoter (by ChIP), and its depletion causes G2-M arrest. |
Chromatin immunoprecipitation (ChIP), siRNA knockdown, flow cytometry cell cycle analysis, RT-PCR for target genes |
Cancer research |
High |
20103625
|
| 2010 |
RBCK1 interacts with Eya1 (Eyes absent 1 protein) and enhances Eya protein function as co-activators for Six transcription factors; knockdown of the Rbck1 ortholog in zebrafish causes a BOR syndrome-like phenotype with ear and branchial arch defects. |
GST pulldown, co-immunoprecipitation, zebrafish morpholino knockdown, in situ hybridization |
Molecular and cellular biology |
High |
20956555
|
| 2012 |
RBCK1 interacts with human PXR (pregnane X receptor) via all RBCK1 domains, ubiquitinates PXR, and promotes its proteasomal degradation, thereby reducing PXR target gene induction by rifampicin in primary human hepatocytes. |
Yeast two-hybrid screening, co-immunoprecipitation, domain mapping, ubiquitination assay, proteasome inhibitor (MG-132) rescue, siRNA knockdown in primary hepatocytes |
Drug metabolism and disposition |
High |
23160820
|
| 2013 |
RBCK1 interacts with FKBPL within HSP90 chaperone complexes together with ERα, regulates FKBPL stability via ubiquitination, and together with FKBPL associates with ERα at the pS2 gene promoter to regulate its transcription. |
Co-immunoprecipitation, ubiquitination assay, stable overexpression clones, siRNA knockdown, ChIP at pS2 promoter |
Oncogene |
High |
23912458
|
| 2016 |
RBCK1 interacts with HOXA1 and TRAF2; RBCK1 and TRAF2 act epistatically downstream of HOXA1 in NF-κB activation, and the HOXA1 11-His repeat and homeodomain are required for RBCK1 binding and NF-κB stimulation. |
Proteome-wide interaction screening, Co-IP, epistasis analysis by overexpression/knockdown, NF-κB luciferase reporter assays, domain deletion mapping |
Nucleic acids research |
High |
27382069
|
| 2019 |
RBCK1 directly interacts with and facilitates poly-ubiquitination and proteasomal degradation of p53 in renal cell carcinoma cells; the proliferative effect of RBCK1 is rescued by p53 knockdown. |
Co-immunoprecipitation, ubiquitination assay, siRNA knockdown, rescue experiment with p53 knockdown, in vivo xenograft |
Cell death & disease |
High |
30874541
|
| 2020 |
MTSS1 interacts with RBCK1 to facilitate RBCK1-mediated K48-linked ubiquitination and degradation of NF-κB p65, suppressing NF-κB signaling; ACTBL2 competes with RBCK1 for MTSS1 binding, leading to p65 stabilization. |
Co-immunoprecipitation, ubiquitination assay (K48-specific), Mtss1 knockout mouse models, competition binding assays, organoid and xenograft models |
Nature cancer |
High |
35122005
|
| 2022 |
RBCK1 is a component of the linear ubiquitin chain assembly complex (LUBAC) and generates linear ubiquitin chains; RBCK1 deficiency causes glycogen hyperphosphorylation and accumulation of polyglucosan bodies with overlong glucan branches in muscle and brain, recapitulating malin-deficient Lafora disease pathology. |
RBCK1-deficient mouse model, glycogen structural analysis (branch length, phosphorylation), neuroinflammation assays, behavioral tests, glycogen synthase downregulation rescue |
Brain : a journal of neurology |
High |
35084461
|
| 2022 |
RBCK1 interacts with PTEN and promotes its K48-linked ubiquitination and proteasomal degradation in ovarian cancer cells. |
Co-immunoprecipitation, K48-linked ubiquitination assay, siRNA knockdown, cell proliferation and apoptosis assays |
Human cell |
Medium |
35174471
|
| 2022 |
RBCK1 interacts with YAP protein and promotes K48-linked poly-ubiquitination of YAP at lysines K76, K204, and K321, leading to YAP degradation and suppression of Hippo/YAP signaling in triple-negative breast cancer. |
Co-immunoprecipitation, ubiquitin-based IP assay with K48-specific linkage detection, protein stability assays, in vitro and in vivo overexpression/depletion, RNA sequencing, luciferase reporter |
Cell communication and signaling |
Medium |
36280829
|
| 2022 |
RBCK1 interacts with RNF31 (HOIP), a partner subunit of LUBAC, and stabilizes RNF31 by repressing its ubiquitination and proteasomal degradation in hepatocellular carcinoma cells. |
Co-immunoprecipitation, ubiquitination assay, overexpression/knockdown, in vivo xenograft |
Cell death discovery |
Medium |
35869046
|
| 2022 |
RBCK1 promotes PPARγ ubiquitination and degradation, thereby disrupting the PPARγ/PGC1α complex and enhancing WNT/β-catenin/GLUT1-mediated aerobic glycolysis in hepatocellular carcinoma cells. |
Co-immunoprecipitation, ubiquitination assay, overexpression/knockdown, WNT/β-catenin reporter, GLUT1 expression analysis |
American journal of cancer research |
Medium |
35411229
|
| 2024 |
RBCK1 interacts with and polyubiquitylates mitofusin 2 (MFN2) to promote its proteasomal degradation under ferroptotic stress, leading to decreased mitochondrial ROS and lipid peroxidation and conferring ferroptosis resistance in pancreatic cancer cells. |
Co-immunoprecipitation, ubiquitination assay, RBCK1 genetic depletion, ferroptosis induction with IKE, mitochondrial ROS measurement, xenograft model |
Free radical biology & medicine |
High |
38763208
|
| 2023 |
RBCK1 promotes degradation of PICK1 via ubiquitination under hypoxia; HIF-1α transcriptionally regulates RBCK1 to mediate this effect, and RBCK1 knockdown inhibits nasopharyngeal carcinoma cell proliferation that is rescued by co-knockdown of PICK1. |
Co-immunoprecipitation, immunofluorescence co-localization, ubiquitination/protein stability assays, siRNA knockdown with genetic rescue, xenograft model |
Life sciences |
Medium |
36934971
|
| 2023 |
RBCK1 promotes degradation of ANKRD35 via ubiquitination; ANKRD35 destabilizes MITD1 by binding SUMO2, and the resulting RBCK1-ANKRD35-MITD1-ANXA1 axis regulates AKT and ERK phosphorylation and sunitinib resistance in renal cell carcinoma. |
Bioinformatic analysis, in vitro/in vivo RBCK1 knockdown, Co-immunoprecipitation, pathway phosphorylation analysis (AKT, ERK) |
Oncogene |
Medium |
36732658
|
| 2022 |
RBCK1 regulates HIF1α signaling in ER-positive breast cancer; RBCK1 depletion affects HIF1α pathway activity, identifying RBCK1 as a regulator of HIF1α in this cancer context. |
siRNA knockdown, western blotting for HIF1α pathway components, cell proliferation assays |
Cell death & disease |
Low |
36473847
|