| 2009 |
BRCC36 (BRCC3) is the catalytic subunit of the BRISC complex and exhibits K63-linked polyubiquitin chain-specific deubiquitinating (DUB) activity; it lacks an active-site cysteine and instead uses a JAMM/MPN+ zinc metalloprotease mechanism. The K63-specific DUB activity is intrinsic to the BRISC complex and does not cleave K6, K11, K29, K48, or alpha-linked chains. |
Biochemical fractionation through seven chromatographic steps; fluorometric DUB assays with linkage-specific ubiquitin substrates; NEM/ubiquitin-aldehyde insensitivity tests |
The EMBO journal |
High |
19214193
|
| 2007 |
BRCC36 (BRCC3) is a component of the BRCA1-A complex (also containing BRCA1/BARD1, ABRAXAS/CCDC98, RAP80, BRCC45/BRE, MERIT40). BRCC36 associates with ABRAXAS via coiled-coil domains on each protein, and RAP80 contains an Abraxas-interacting region (AIR) required for association of RAP80 with ABRAXAS, BRCA1, and BRCC36. The entire complex is recruited to DNA double-strand break (DSB) foci through RAP80 UIM-domain binding to RNF8/Ubc13-generated K63-linked polyubiquitin chains. |
Co-immunoprecipitation; domain mapping; RNAi knockdown of RNF8/Ubc13 with immunofluorescence foci assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
18077395
|
| 2009 |
The RAP80-BRCC36 complex opposes RNF8-Ubc13-dependent ubiquitination at DSBs. BRCC36 knockdown or expression of a DUB-inactive BRCC36 mutant rescued 53BP1 recruitment and γ-H2AX ubiquitination following RNF8 depletion, demonstrating that BRCC36 hydrolase activity counterbalances RNF8 ubiquitin ligase activity to set steady-state ubiquitin levels at DSBs. |
siRNA knockdown; DUB-inactive mutant expression; immunofluorescence; ionizing radiation sensitivity assays |
Proceedings of the National Academy of Sciences of the United States of America |
High |
19202061
|
| 2010 |
BRCC36 exists in two distinct subcellular complexes determined by two scaffold proteins: nuclear ABRAXAS/CCDC98 (within the BRCA1-A complex) and cytoplasmic KIAA0157 (ABRO1, within BRISC). ABRAXAS and KIAA0157 each regulate BRCC36 DUB activity. Reduction of KIAA0157 increases the BRCA1-A complex in the nucleus, indicating the two complexes are in dynamic balance. BRCC36 reduces K63-linked ubiquitin chains at chromatin and deubiquitinates diubiquitinated histone H2A. |
Co-immunoprecipitation; subcellular fractionation; siRNA knockdown; in vitro DUB assays with K63-linked diubiquitin-H2A substrate |
The Journal of biological chemistry |
High |
20656690
|
| 2011 |
Both the nuclear BRCA1-A (ABRAXAS-containing) and cytoplasmic BRISC (ABRO1-containing) complexes share the common subunits BRE and NBA1/MERIT40. NBA1 and BRE interact through a C-terminal conserved motif of NBA1 and the C-terminal UEV domain of BRE; this interaction is essential for maintaining the integrity of both complexes and for cellular resistance to ionizing radiation and BRCA1 recruitment to DSBs. |
Co-immunoprecipitation; domain deletion/mutation mapping; siRNA knockdown; clonogenic survival assays; immunofluorescence |
The Journal of biological chemistry |
High |
21282113
|
| 2012 |
BRCC3 (BRCC36) deubiquitinates NLRP3 and acts as a critical positive regulator of NLRP3 inflammasome activation. NLRP3 is a substrate of the cytosolic BRISC complex containing BRCC3. Pharmacological and siRNA-mediated inhibition of BRCC3 DUB activity suppresses NLRP3 inflammasome activation. |
Pharmacological DUB inhibition; siRNA knockdown; ubiquitination assays; caspase-1 and IL-1β activity assays |
Molecular cell |
High |
23246432
|
| 2006 |
BRCC36 (BRCC3) regulates BRCA1 activation in response to DNA damage: knockdown of BRCC36 disrupts ionizing radiation-induced BRCA1 phosphorylation and prevents formation of BRCA1 nuclear foci at DSBs, sensitizing breast cancer cells to IR-induced apoptosis. BRCC36 regulates ubiquitin E3 ligase activity of the BRCC complex. |
siRNA knockdown in MCF-7, ZR-75-1, T47D cells; immunoblot; immunofluorescence of BRCA1 and γ-H2AX foci; apoptosis assays |
Cancer research |
Medium |
16707425
|
| 2011 |
Loss of BRCC3 function in zebrafish (brcc3 morphants) causes angiogenesis defects that are rescued by endothelium-specific expression of brcc3, establishing BRCC3 as an essential regulator of angiogenesis in vivo. |
Morpholino knockdown in zebrafish; rescue by endothelium-specific BRCC3 expression; vascular imaging |
American journal of human genetics |
Medium |
21596366
|
| 2015 |
Structural characterization of the BRCC36-KIAA0157 (ABRO1) heterodimer reveals BRCC36 is activated by contacts with the pseudo-DUB KIAA0157 (MPN− domain). An inactive BRCC36 homodimer exists; heterodimerization with KIAA0157 switches BRCC36 to an active conformation. Furthermore, a higher-order dimer-of-heterodimers ('super-dimer') assembly is required for full DUB activity and for interactions with targeting proteins SHMT2 and RAP80. |
X-ray crystallography; in vitro DUB activity assays; mutagenesis of interface residues; size-exclusion chromatography/analytical ultracentrifugation; pulldown assays |
Molecular cell |
High |
26344097
|
| 2016 |
BRCC36 DUB activity within the BRCA1-A complex limits DSB end resection and DNA repair. Inactivation of BRCC36 DUB (via RNAi or CRISPR editing) attenuated BRCA1-A complex accumulation at DSBs and led to unrestrained DSB end resection and hyperactive DNA repair, while the structural integrity of the complex was maintained. |
RNAi; CRISPR/Cas9 genome editing; catalytic mutant expression; end resection assays; BRCA1-A foci quantification |
The Journal of biological chemistry |
High |
27288411
|
| 2016 |
The BRISC complex (ABRO1/BRCC36) removes K63-linked ubiquitin chains from tankyrase 1 in G1 phase, while RNF8 adds K63-linked ubiquitin chains in late S/G2. This ubiquitination/deubiquitination cycle controls tankyrase 1 stabilization, telomere association, and resolution of sister telomere cohesion in a cell cycle-regulated manner. |
Co-immunoprecipitation; ubiquitination assays; cell cycle synchronization; telomere FISH; siRNA knockdown of ABRO1/BRCC36 |
The EMBO journal |
High |
27993934
|
| 2019 |
Crystal/cryo-EM structures of the BRCA1-A and BRISC complexes reveal: (1) In BRCA1-A, ABRAXAS integrates RAP80 and provides a high-affinity BRCA1-binding site that sequesters BRCA1 away from DSBs. (2) In BRISC, ABRO1 binds the metabolic enzyme SHMT2α, which in this context prevents BRCC36 from binding and cleaving ubiquitin chains (inhibitory regulation). Different adaptor subunits thus confer diversified targeting and regulatory functions on the same BRCC36 catalytic subunit. |
Cryo-EM and X-ray crystallography; in vitro DUB activity assays; binding assays; mutagenesis |
Molecular cell |
High |
31253574
|
| 2018 |
SHMT2 acts as a regulatory adaptor in the BRISC complex: SHMT2 and BRCC36 (via BRISC) regulate HIV-1 Tat K63-ubiquitylation. Knockdown of SHMT1/2 or BRCC36 strongly increased K63-Ub-dependent autophagic destruction of Tat; point mutation of multiple lysines in Tat or knockdown of BRCC36/SHMT1,2 prevented JIB-04-induced Tat destruction. |
Proximity proteomics (DiffPOP); mass spectrometry; siRNA knockdown; Tat ubiquitination assays; autophagy flux assays; site-directed mutagenesis of Tat lysines |
PLoS pathogens |
Medium |
29791506
|
| 2019 |
Vitamin D receptor (VDR) physically binds NLRP3 and blocks the association of NLRP3 with BRCC3, thereby preventing BRCC3-mediated deubiquitination and subsequent NLRP3 activation. VDR thus acts as a negative regulator of NLRP3 by competing with BRCC3 for NLRP3 binding. |
Co-immunoprecipitation; ubiquitination assays; VDR knockout mice; IL-1β/caspase-1 activation assays |
Frontiers in immunology |
Medium |
31866999
|
| 2020 |
ABRO1 stabilizes BRCC3 protein by competing with the HECT-type E3 ubiquitin ligase WWP2 for binding to BRCC3, thereby preventing WWP2-mediated K48-linked ubiquitination and proteasomal degradation of BRCC3. WWP2 overexpression in macrophages inhibits NLRP3 inflammasome activation by reducing BRCC3 levels. |
Co-immunoprecipitation; ubiquitination assays; cycloheximide chase; siRNA/lentiviral overexpression; caspase-1 and IL-1β assays |
FEBS letters |
Medium |
33107021
|
| 2021 |
BRCC36 (BRCC3) specifically associates with FLT3-ITD (but not wild-type FLT3 or FLT3-TKD) through K63-linked polyubiquitination at K609 of the ITD mutant. BRCC36 knockdown decreases STAT5 phosphorylation and cell proliferation in FLT3-ITD AML cells. |
Proximity labeling (TurboID); K63-ubiquitination assays; site-directed mutagenesis (K609R); siRNA knockdown; phospho-STAT5 immunoblot; cell proliferation assays |
Cancer science |
Medium |
38288901
|
| 2021 |
HSV-1-encoded ICP0 induces K48-linked polyubiquitination and proteasomal degradation of BRCC36, leading to downmodulation of IFN-I receptor IFNAR1 and suppression of the host type I interferon antiviral response. |
Co-immunoprecipitation; ubiquitination assays; viral infection time-courses; immunoblot; IFNAR1 surface level measurement |
Molecular immunology |
Medium |
33857816
|
| 2020 |
BRCC36 maintains STAT1 protein stability noncatalytically by recruiting USP13 to form a complex that antagonizes Smurf1-mediated STAT1 degradation. BRCC36 deficiency causes rapid STAT1 downregulation during viral infection, impairing antiviral immunity in vivo. |
Co-immunoprecipitation; STAT1 stability assays; viral challenge in BRCC36-deficient mice; USP13/Smurf1 epistasis experiments |
European journal of immunology |
Medium |
32673428
|
| 2023 |
In TET2-deficient macrophages, increased JNK1 signaling (due to hypermethylation and decreased expression of the phosphatase DUSP10) promotes BRCC3-mediated NLRP3 deubiquitylation and inflammasome activation, accelerating atherosclerosis. The BRCC3 inhibitor holomycin or hematopoietic deficiency of ABRO1 (essential BRISC scaffolding protein) reversed accelerated atherosclerosis and NETosis in Tet2 CH mice. |
Cholesterol-loaded TET2-deficient macrophages (murine and human ESC-derived isogenic); JNK1 phosphorylation assays; NLRP3 ubiquitylation assays; Tet2 CH mouse atherosclerosis model; ABRO1 hematopoietic KO; holomycin pharmacological inhibition |
Circulation |
High |
37781816
|
| 2019 |
BRCC3 mutations in AML with t(8;21) abrogate its DUB activity on IFNAR1, resulting in impaired interferon response, and also diminish inflammasome activity. BRCC3 inactivation by CRISPR/Cas9 in t(8;21) AML cell lines improved proliferation and, combined with AML1-ETO, induced unlimited self-renewal of mouse hematopoietic progenitors. |
CRISPR/Cas9 inactivation; DUB activity assays on IFNAR1 substrate; interferon response assays; colony-forming assays; cytokine profiling |
Leukemia |
Medium |
31576005
|
| 2024 |
BRCC36 deubiquitinates HMGCR in a DUB-activity-dependent manner, stabilizing HMGCR and suppressing ferroptosis while promoting pyroptosis in hepatocellular carcinoma cells. |
Co-immunoprecipitation; ubiquitination assays; DUB-inactive mutant; cell death assays (ferroptosis/pyroptosis markers); in vivo xenograft model with thiolutin (BRCC36 inhibitor) |
Advanced science |
Medium |
38178583
|
| 2024 |
BRCC3 deubiquitinates ALK2 at Lys-472 and Lys-475 (K63-linked), activating receptor-regulated Smad1/5/9 and transcriptional activation of BMP-regulated PPARγ, p53, and Id1. BRCC3 also attenuates TGF-β signaling by downregulating TGF-β expression and inhibiting Smad3 phosphorylation. Smooth muscle cell-specific BRCC3 transgenic mice are protected from experimental pulmonary hypertension, while Brcc3−/− mice show increased susceptibility. |
Bioinformatic ubiquitination site prediction; site-directed mutagenesis (K472/475R ALK2); Co-immunoprecipitation; ubiquitination assays; SM22α-BRCC3-Tg and Brcc3−/− mouse models; pulmonary hemodynamics |
Circulation |
High |
38557054
|
| 2022 |
BRCC36 binds β-catenin and inhibits its phosphorylation; BRCC36 overexpression reduces phosphorylated β-catenin levels in the nucleus and calcium deposition in VSMCs, negatively regulating the Wnt/β-catenin pathway to prevent vascular calcification. |
Co-immunoprecipitation; immunofluorescence; Alizarin red staining; calcium content assays; overexpression/knockdown in VSMCs and CKD mouse model |
Experimental cell research |
Medium |
35149088
|
| 2024 |
BRCC36 inhibits the Wnt/β-catenin pathway by specifically decreasing K63-linked ubiquitination of β-catenin, attenuating osteogenic differentiation of VSMCs and vascular calcification. This was confirmed by TOPFlash luciferase reporter assay and rescue experiments. |
Co-immunoprecipitation; K63-specific ubiquitination assays; TOPFlash luciferase reporter; VSMC-specific overexpression/knockdown; CKD mouse model |
Journal of translational medicine |
Medium |
39227917
|
| 2024 |
BRCC36 in the BRISC complex protects cereblon (CRBN) from lysosomal degradation by specifically cleaving K63-linked polyubiquitin chains on CRBN. SHIN1, which binds SHMT2 (a BRISC subunit), upregulates CRBN by activating BRCC36 in this context. |
TurboID proximity labeling; quantitative proteomics; Co-immunoprecipitation; K63-specific ubiquitination assays; lysosomal degradation assays; cell viability assays |
Cellular and molecular life sciences : CMLS |
Medium |
39136771
|
| 2023 |
BRCC3 interacts with TAZ (WWTR1) and the cytoplasmic BRCA1 complex controls TAZ ubiquitination and stability. Loss of BRCC3 or BRCA1 leads to increased TAZ levels and transcriptional activity, linking BRCA1 complex inactivation to TAZ oncogene activation. |
siRNA screen; Co-immunoprecipitation; ubiquitination assays; TAZ reporter assays; loss-of-function genetic approaches |
Cells |
Low |
37887275
|
| 2019 |
Cyclin-dependent kinase 5 (Cdk5) increases BRCC3 expression levels in a PD cell model; Cdk5 and BRCC3 physically interact (confirmed by co-immunoprecipitation); inhibition of Cdk5 reduces BRCC3 expression and downstream NLRP3 inflammasome activation. |
Co-immunoprecipitation; shRNA lentiviral knockdown; pharmacological Cdk5 inhibition; caspase-1 and IL-1β assays |
Biochemical and biophysical research communications |
Low |
31787240
|
| 2022 |
Cdk5 phosphorylates BRCC3 in vitro; multiple phosphorylation sites were predicted and confirmed by in vitro kinase assay, western blotting, and mass spectrometry using purified His-BRCC3 fusion protein. |
In vitro kinase assay; mass spectrometry; western blotting with phospho-specific detection; recombinant protein purification |
Bulletin of experimental biology and medicine |
Medium |
35503584
|
| 2022 |
TRIM14 recruits USP14 and BRCC3 to form a regulatory complex (TRIM14-USP14-BRCC3) that inhibits OPTN-mediated autophagic degradation of the histone demethylase KDM4D, thereby epigenetically promoting inflammatory gene expression. |
Co-immunoprecipitation; autophagy flux assays; inflammatory gene expression readouts (described in brief communication format) |
Autophagy |
Low |
35311471
|
| 2024 |
BRCC3 deubiquitinates and stabilizes ZEB1 (an EMT transcription factor) in triple-negative breast cancer cells; BRCC3 physically interacts with ZEB1 and reduces its ubiquitination, increasing ZEB1 protein stability and promoting EMT, proliferation, migration, invasion, and metastasis. |
Co-immunoprecipitation; ubiquitination assays; protein stability assays (cycloheximide chase implied); siRNA knockdown; in vivo TNBC mouse model |
Acta biochimica et biophysica Sinica |
Medium |
38449391
|
| 2024 |
BRCC3 promotes NF-κB signaling in dental pulp cells by expediting IκBα phosphorylation and degradation and p65 nuclear translocation; conditional knockout of Brcc3 in mouse dental pulp cells reduces IL-6, immune cell recruitment, and pulp necrosis after pulp exposure. |
RNA-sequencing; dual luciferase reporter assay; immunofluorescence; western blot; conditional Brcc3 knockout mice; pulpitis histology |
Biochimica et biophysica acta. Molecular basis of disease |
Medium |
39880291
|
| 2024 |
BRCC3 (BRCC36) deubiquitinates MET receptor in colon adenocarcinoma cells, stabilizing MET protein and promoting migration, invasion, and EMT; overexpression of MET reverses the effects of BRCC3 knockdown. |
Co-immunoprecipitation; ubiquitination assays; shRNA knockdown; rescue with MET overexpression; migration/invasion assays |
Genes & genomics |
Low |
38470543
|
| 2024 |
BRCC36 promotes BRCC3 stability by activating the BRCC36-BRG1-mTOR signaling axis in mammary epithelial cells: BRCC36 binds BRG1, inhibits BRG1 protein level and BRG1 binding to the mTOR promoter, thereby suppressing mTOR gene transcription and protein phosphorylation. Methionine decreases BRCC36 protein via ubiquitin-proteasome degradation, thereby relieving suppression of this axis. |
Co-immunoprecipitation; chromatin immunoprecipitation (BRG1 on mTOR promoter); BRCC36 knockdown/overexpression; MG132/cycloheximide/chloroquine treatment; ubiquitination assays |
Journal of agricultural and food chemistry |
Medium |
38240727
|
| 2024 |
Molecular glues ('BLUEs') stabilize a 16-subunit BRISC dimer in an autoinhibited conformation, blocking BRCC36 active sites and interactions with the SHMT2 targeting subunit, resulting in selective inhibition of BRISC (K63-linked DUB activity on IFNAR1) without affecting the BRCA1-A complex or other JAMM/MPN DUBs. BLUEs increased IFNAR1 K63-ubiquitylation and decreased IFNAR1 surface levels, reducing interferon-stimulated gene expression. |
Cryo-EM structural determination; in vitro DUB activity assays; mutagenesis of inhibitor-binding interface; IFNAR1 ubiquitylation assays; ISG expression in cells with WT vs. inhibitor-resistant BRISC |
bioRxivpreprint |
High |
|