| 2008 |
CCAR1 is required for Mediator complex recruitment by nuclear receptors (NRs) to target gene promoters. CCAR1 associates with components of the Mediator and p160 coactivator complexes, is recruited to endogenous NR target genes in response to hormone, and its depletion inhibits hormone-induced recruitment of Mediator components and RNA polymerase II to target gene promoters. |
Co-immunoprecipitation, ChIP, siRNA knockdown with endogenous gene expression readouts |
Molecular cell |
High |
18722177
|
| 2008 |
CCAR1 localizes to RNA stress granules in a microtubule-dependent manner. CCAR1 was identified as a binding partner of the scaffolding protein AKAP350A; both proteins, along with caprin-1, relocate to G3BP-positive stress granules after arsenite treatment, and this relocalization requires intact microtubules. Reduction of CCAR1 expression altered the size and number of stress granules. |
Co-immunoprecipitation, immunofluorescence/live-cell imaging, nocodazole treatment, siRNA knockdown |
Experimental cell research |
High |
19073175
|
| 2011 |
CCAR1 (CARP-1) directly binds the APC/C E3 ubiquitin ligase subunit APC-2, as well as APC/C co-activators Cdc20 and Cdh1. The CARP-1/APC-2 interaction has a dissociation constant of ~480 nM. Disruption of this interaction causes G2/M cell cycle arrest and apoptosis involving caspase-8 and -9 activation and loss of cyclin B1 and Cdc20. |
Yeast two-hybrid, fluorescence polarization assay, small molecule antagonist (CFM-4) functional studies, siRNA knockdown |
The Journal of biological chemistry |
High |
21903591
|
| 2013 |
CCAR1 functions as an androgen receptor (AR) co-activator by stabilizing the interaction between AR and the pioneer factor GATA2. CCAR1 directly interacts with both AR and GATA2, promotes their co-occupancy on AR-binding enhancer sites, and is required for androgen-induced long-range enhancer-promoter interaction at the PSA locus. |
Co-immunoprecipitation, ChIP, chromosome conformation capture (3C), siRNA knockdown with gene expression and in vivo tumorigenicity readouts |
Nucleic acids research |
High |
23887938
|
| 2013 |
Par-4 and THAP1 form a protein complex (via their carboxyl termini) that binds the CCAR1 promoter through THAP1's zinc-dependent DNA-binding domain and activates CCAR1 transcription, promoting apoptosis. Notch3 competitively binds the CCAR1 promoter and, via splicing factors SRp40 and SRp55, shifts CCAR1 pre-mRNA splicing toward a shorter isoform, antagonizing Par-4/THAP1 complex function. |
Co-immunoprecipitation, promoter reporter assay, alternative splicing analysis, siRNA/overexpression in T-ALL cells |
Oncogene |
High |
23975424
|
| 2014 |
CCAR1 functions as a co-activator of the glucocorticoid receptor (GR) during adipogenesis. GR recruits CCAR1 to glucocorticoid response elements in the PPARγ gene, and CCAR1 is required for GR occupancy and chromatin remodeling at one PPARγ GBR. Depletion of CCAR1 markedly suppresses differentiation of mesenchymal stem cells and 3T3-L1 preadipocytes. |
ChIP, siRNA knockdown, adipocyte differentiation assays |
The Journal of biological chemistry |
High |
24811171
|
| 2013 |
CCAR1 interacts with GATA1 and the Mediator coactivator MED1 (via the CCAR1/CoCoA pair). Recombinant GATA1, CCAR1, CoCoA, and MED1(1-602) form a complex in vitro, and CCAR1/CoCoA synergistically enhance GATA1-mediated transcription from the γ-globin promoter. |
In vitro reconstitution, co-immunoprecipitation, ChIP, reporter gene assay |
Genes to cells |
High |
24245781
|
| 2012 |
Necdin promotes CCAR1 ubiquitination and proteasomal degradation to suppress CCAR1-mediated apoptosis in myoblasts. Necdin was identified as a CCAR1-interacting protein by two-hybrid screening; loss of necdin results in elevated CCAR1 and increased apoptosis. |
Yeast two-hybrid, co-immunoprecipitation, ubiquitination assay, proteasome inhibitor experiments, siRNA knockdown |
PloS one |
High |
22905258
|
| 2010 |
CCAR1 (CARP-1) binds the LIM domain of the focal adhesion/nuclear protein zyxin. This interaction is required for UV-induced apoptosis: zyxin lacking the CCAR1-binding region shows reduced pro-apoptotic activity, and CCAR1 is a nuclear protein that accumulates in the nucleus upon UV-C exposure. |
Affinity pulldown, microsequence identification, deletion mapping, co-immunoprecipitation, UV-C apoptosis assay, zyxin-null fibroblast rescue |
Genes & cancer |
High |
20852740
|
| 2010 |
CCAR1 threonine667 phosphorylation regulates its binding to the transcriptional co-activator TAZ. H89 (PKA inhibitor) treatment stimulates threonine phosphorylation of CCAR1, and a T667A substitution in CCAR1 disrupts binding to TAZ and abrogates H89-induced apoptosis. CCAR1 also suppresses c-myc transcription. |
Co-immunoprecipitation, site-directed mutagenesis, overexpression, Western blotting, apoptosis assay |
Journal of molecular signaling |
Medium |
20594350
|
| 2012 |
CCAR1 directly interacts with and is required as a co-activator for Neurogenin3 (Ngn3)-mediated endocrine differentiation. CCAR1 association with Ngn3 was verified by pulldown and co-immunoprecipitation; depletion of CCAR1 inhibited Ngn3-initiated transdifferentiation of pancreatic ductal cells. |
Pulldown assay, co-immunoprecipitation, reporter gene assay, siRNA knockdown |
Biochemical and biophysical research communications |
Medium |
22266316
|
| 2021 |
KDM4B physically associates with CCAR1 and MED1 in a trimeric complex. This KDM4B-CCAR1-MED1 complex occupies promoters of osteoclast-related genes upon RANKL stimulation, induces H3K9 demethylation (euchromatinization), and facilitates NF-κB p65 recruitment via direct interaction between KDM4B and p65, driving osteoclastogenesis. |
Co-immunoprecipitation, ChIP-sequencing, conditional KO mouse model, small molecule inhibition |
Bone research |
High |
34031372
|
| 2019 |
CCAR1 directly binds H2AX (histone 2AX) and this interaction is required for apoptosis signaling after DNA damage. CCAR1 amino acids 636–650 contain the H2AX-interacting epitope, and H2AX residues 1–35 contain the CCAR1-binding epitope. Surface plasmon resonance measured a Kd of 127 nM. Cells expressing CCAR1(Δ600–652) are resistant to apoptosis and show diminished γH2AX. |
Co-immunoprecipitation, deletion mutagenesis, surface plasmon resonance, co-localization imaging, apoptosis assay |
Cancers |
High |
30769864
|
| 2020 |
CCAR1 directly binds NEMO (IKKγ) and regulates the chemotherapy-activated canonical NF-κB pathway. Blockade of NEMO-CCAR1 binding diminishes adriamycin-induced p65/RelA phosphorylation but not TNFα- or IL-1β-induced NF-κB activation, indicating a selective role in chemotherapy-driven NF-κB signaling. |
Co-immunoprecipitation, high-throughput small molecule screening, siRNA knockdown, in vitro and in vivo NF-κB reporter/phosphorylation assays |
The Journal of biological chemistry |
High |
32024692
|
| 2024 |
CCAR1 functions as a splicing fidelity factor required for proper mRNA processing of FANCA and many other transcripts. CCAR1 co-immunoprecipitates with FANCA pre-mRNA; its loss causes inclusion of a poison exon in FANCA mRNA, reducing FANCA protein and phenocopying Fanconi anemia pathway loss. The EF hand domain of CCAR1 is required for interaction with the U2AF heterodimer of the spliceosome and for poison exon excision. |
CRISPR inhibition screen, siRNA knockdown, RNA-seq transcriptomics, RNA immunoprecipitation, domain mutagenesis, co-immunoprecipitation with spliceosome components |
Molecular cell |
High |
38964321 39025073
|
| 2024 |
CCAR1's EF hand domain mediates interaction with the U2AF heterodimer of the spliceosome, and this interaction is required for excision of a poison exon in FANCA pre-mRNA. Loss of CCAR1 abrogates FANCA protein expression and impairs both HDR and interstrand crosslink repair. |
Co-immunoprecipitation of CCAR1 with U2AF, RNA immunoprecipitation of FANCA pre-mRNA, domain mutagenesis, HDR/ICL repair assays |
Molecular cell |
High |
38964321 39025073
|
| 2018 |
CCAR1 acts as an enhancer-dependent co-activator of the constitutive androstane receptor (CAR). CCAR1 was identified by co-immunoprecipitation using FLAG-tagged CAR; overexpression of CCAR1 selectively enhanced CAR-driven reporter activity from XREM and gtPBREM enhancers but not PBREM. CCAR1 is recruited to the gtPBREM of UGT1A1 by CAR and cooperates with p160 SRC coactivators. |
Co-immunoprecipitation with FLAG-CAR, reporter gene assay, siRNA knockdown, ChIP |
Molecular pharmacology |
Medium |
30397001
|
| 2016 |
CCAR1 5' UTR contains structured elements that interact with miR-1254, leading to reciprocal stabilization of both the miRNA and CCAR1 mRNA—a 'miRancer' mechanism—rather than canonical miRNA-mediated repression. |
Luciferase reporter assays, RNA secondary structure analysis, miRNA/mRNA stability assays |
Cell research |
Medium |
27002217
|
| 2013 |
PTH downregulates CCAR1 protein in osteoblasts via a PKA- and p38 MAPK-dependent (but ERK-independent) pathway, and causes nuclear-to-cytoplasmic translocation of CCAR1 protein. |
Western blotting, kinase inhibitors (H-89, GF109203X, U0126, SB203580), immunofluorescence in differentiated osteoblasts |
Biochemical and biophysical research communications |
Medium |
23764399
|
| 2022 |
DCLK1 kinase interacts with CCAR1 through its C-terminal domain and phosphorylates CCAR1 at Ser343, which is essential for CCAR1 protein stabilization. DCLK1 positively regulates β-catenin signaling via CCAR1 to maintain cancer stemness. |
Co-immunoprecipitation, phosphorylation mapping, site-directed mutagenesis, siRNA knockdown, in vitro and in vivo cancer stemness assays |
Clinical and translational medicine |
High |
35522902
|
| 2006 |
CCAR1 overexpression inhibits FAK (focal adhesion kinase) autophosphorylation at Y397 in breast cancer cells, identifying FAK as a downstream target of CCAR1's growth-regulatory function. |
Western blotting of FAK-397 phosphorylation in CCAR1 overexpressing cells |
American journal of surgery |
Low |
17071197
|
| 2025 |
In mouse ESCs, Ccar1 prevents nuclear translocation of β-catenin to maintain ground-state pluripotency. siRNA-mediated Ccar1 knockdown promotes β-catenin nuclear translocation and upregulates Wnt target genes while reducing pluripotency markers. |
siRNA knockdown, immunofluorescence (β-catenin localization), qRT-PCR |
Biochemistry and biophysics reports |
Low |
40978202
|