| 2004 |
CNOT7 binds the AF-1 domain of retinoid X receptor beta (RXRβ) and functions as a coregulator of RXRβ in testicular somatic cells (Sertoli cells); loss of CNOT7 impairs RXRβ function and leads to oligo-astheno-teratozoospermia. Spermatogonial transplantation demonstrated the defect is in the somatic (Sertoli cell) microenvironment, not the germ cells. |
Co-immunoprecipitation/binding assay for AF-1 domain interaction; spermatogonial stem cell transplantation epistasis; Cnot7 knockout mouse phenotypic analysis |
Nature genetics |
High |
15107851 15700538
|
| 2004 |
Wild-type germ cells transplanted into Cnot7−/− testes develop abnormal spermatids, confirming that Sertoli cell defects (not germ cell-intrinsic defects) are responsible for the spermatogenic failure in Cnot7-null mice. |
Reciprocal spermatogonial transplantation assay |
Archives of histology and cytology |
High |
15700538
|
| 2007 |
CNOT7 acts as an endogenous suppressor of bone mass by inhibiting BMP-induced osteoblast activity; Cnot7−/− mice show >50% increase in bone mass with enhanced bone formation but no change in resorption, and Cnot7−/− osteoblasts exhibit heightened BMP-induced alkaline phosphatase expression. CNOT7 binds TOB, a BMP inhibitor, placing it in the BMP signaling pathway in osteoblasts. |
Cnot7 knockout mouse histomorphometry, microCT, in vitro BMP stimulation of calvaria-derived osteoblasts, in vivo BMP2 injection assay, TOB interaction (binding data from prior work cited) |
Journal of bone and mineral research |
High |
17451368
|
| 2009 |
Human CNOT7 (hCaf1/Caf1a) and its paralog CNOT8 possess deadenylase activity mediated by DEDD nuclease domains and are required for efficient cell proliferation; CNOT7's role in proliferation partly depends on its catalytic activity. Combined knockdown of CNOT7 and CNOT8 further reduces proliferation, indicating partial functional redundancy. |
siRNA knockdown of CNOT7 and/or CNOT8 in MCF7 cells; cell proliferation assays; gene expression profiling; catalytic mutant analysis |
Molecular biology of the cell |
High |
19605561
|
| 2012 |
The anti-proliferative activity of BTG/TOB proteins (BTG2, TOB1) requires direct interaction with CNOT7 (Caf1a) and CNOT8 (Caf1b) deadenylases; BTG/TOB mutants unable to bind Caf1a/Caf1b lose anti-proliferative activity. BTG/TOB regulation of mRNA abundance and translation also depends on Caf1a/Caf1b, and does not require the Ccr4a/Ccr4b deadenylases or non-catalytic subunits CNOT1/CNOT3. |
Structure-guided mutagenesis of BTG2/TOB1 interaction surfaces; cell proliferation assays with interaction-deficient mutants; mRNA abundance and translation assays |
PloS one |
High |
23236473
|
| 2013 |
CNOT7/hCAF1 regulates interferon (IFN) signaling by: (1) interacting with latent STAT1 in the cytoplasm of resting cells to control STAT1 trafficking/shielding from undesirable stimulation; (2) upon IFN treatment, STAT1 is released from hCAF1; (3) hCAF1 silencing enhances basal STAT1 promoter occupancy and expression of STAT1-regulated genes, conferring increased antiviral protection; (4) hCAF1 uses its deadenylase activity to accelerate degradation of STAT1-regulated mRNAs during IFN signal extinction. |
Co-immunoprecipitation (hCAF1–STAT1 interaction); hCAF1 siRNA knockdown; reporter/promoter occupancy assays; viral infection protection assays; deadenylase activity assay |
The EMBO journal |
High |
23386060
|
| 2014 |
CNOT7/hCAF1, tristetraprolin (TTP), and CNOT1 form a co-immunoprecipitable complex; CNOT7 silencing stabilizes ICAM-1 and IL-8 mRNAs and increases their protein levels after TNF-α stimulation, establishing CNOT7 as the deadenylase effector downstream of TTP-ARE-mediated mRNA decay for these inflammatory targets. |
Co-immunoprecipitation (TTP–CNOT7–CNOT1 complex); RIP (TTP bound to ICAM-1 and IL-8 mRNAs); siRNA knockdown of CNOT7; mRNA stability and protein quantification |
Cellular signalling |
Medium |
25038453
|
| 2015 |
CNOT7 is encoded by a dormant maternal mRNA in mouse oocytes that is recruited (translated) during meiotic maturation; the resulting increase in CNOT7 protein is necessary and sufficient to drive deadenylation of maternal mRNAs. Inhibiting the maturation-associated increase in CNOT7 via siRNA blocks mRNA deadenylation, whereas premature expression of CNOT7 in pre-maturation oocytes initiates deadenylation. Loss of the CNOT7 increase also causes ~70% decrease in transcription in 2-cell embryos. |
siRNA knockdown of CNOT7 during oocyte maturation; ectopic CNOT7 expression in meiotically arrested oocytes; poly(A) tail length assays; quantification of total poly(A); transcription assay in 2-cell embryos |
Biology of reproduction |
High |
26134871
|
| 2016 |
CNOT7 drives tumor cell-autonomous metastatic potential in a manner requiring its deadenylase activity and its interactions with CNOT1 and TOB1. CNOT7 RIP identified target transcripts enriched for a tripartite 3'UTR motif bound by RNA-binding proteins known to complex with CNOT7/TOB1/CNOT1, supporting a model of post-transcriptional suppression of a metastasis-suppressive transcriptional program. |
Orthotopic metastasis assays; genetically engineered mouse models; deadenylase-dead mutant rescue; co-immunoprecipitation for CNOT1 and TOB1 interactions; RIP-seq; transcriptome analysis |
PLoS genetics |
High |
26807845
|
| 2017 |
CNOT7 dynamically regulates dendritic mRNA poly(A) tail length and transport in hippocampal neurons; synaptic stimulation causes a rapid decrease in CNOT7, leading to transient poly(A) elongation of target mRNAs, followed by later deadenylation. CNOT7 is required for hippocampal-dependent learning and memory in mice. |
Live imaging and fractionation of CNOT7 in cultured hippocampal neurons; poly(A) tail length assays after synaptic stimulation; CNOT7 knockdown; in vivo behavioral/cognitive testing in mice |
Cell reports |
High |
28723570
|
| 2017 |
Alternative splicing of the CNOT7 gene produces a shorter isoform (CNOT7v2) that: (1) interacts with CCR4-NOT subunits but not BTG proteins; (2) localizes to the nucleus rather than cytoplasm; (3) lacks poly(A)-degrading activity in vitro despite conserved DEDD domain; (4) preferentially associates with PRMT1 to regulate its arginine methyltransferase activity; and (5) regulates inclusion of CD44 variable exons (alternative splicing). |
Biochemical characterization of splice variant; subcellular fractionation/localization; in vitro deadenylase assay; co-immunoprecipitation with PRMT1; alternative splicing reporter assays in cellulo |
Nucleic acids research |
High |
28591869
|
| 2017 |
In zebrafish, Cnot7-mediated deadenylation and Dcp2-mediated decapping make pervasive but nonuniform contributions to maternal mRNA clearance during maternal-to-zygotic transition; individual mRNAs differ in their relative dependency on each pathway. |
Overexpression of catalytically inactive Dcp2; RNA-seq to measure mRNA levels; comparison with Cnot7-depleted embryos |
Genes to cells |
Medium |
28557307
|
| 2020 |
CNOT7 and CNOT8 together are essential for cell viability in primary mouse embryonic fibroblasts (MEFs): Cnot7/8 double-KO MEFs undergo cell death, whereas Cnot6/6l double-KO MEFs remain viable. Exogenous catalytically dead CNOT7 cannot rescue viability, establishing that CNOT7/8 deadenylase activity is essential. In Cnot7/8-dKO MEFs, CNOT6/6L are also absent from the CCR4-NOT complex (detected by Co-IP), but CNOT6/6L alone are insufficient for cell viability. |
Double-knockout MEFs (Cnot7/8 and Cnot6/6l); catalytic mutant rescue experiment; co-immunoprecipitation to assess complex assembly; bulk poly(A) tail analysis; mRNA stability profiling |
RNA biology |
High |
31924127
|
| 2022 |
CNOT7 outcompetes its paralog CNOT8 for incorporation into the CCR4-NOT complex: CNOT7 has greater affinity for the scaffold protein CNOT1 and can block CNOT8 from binding CNOT1. Depletion of CNOT7 increases CNOT8 incorporation into the CCR4-NOT complex and stabilizes CNOT8 protein. CNOT8 protein is less stable than CNOT7, and its increased abundance upon CNOT7 depletion is not due to mRNA stabilization or increased translation. |
Co-immunoprecipitation (CNOT7/CNOT8 competition for CNOT1); siRNA knockdown; protein stability assays; mRNA quantification; polysome/translation analysis |
Journal of molecular biology |
High |
35248544
|
| 2024 |
Small-molecule inhibitors of the CNOT7/Caf1 nuclease active site were identified; molecular docking suggests binding involves π-π interactions with His225, hydrogen bonding with the backbone of Phe43, and Van der Waals interactions with His225, Leu209, Leu112, and Leu115. Substituents on the 1-phenyl group of the inhibitor scaffold contribute significantly to binding potency. |
Fluorescence-based nuclease assay (biochemical IC50 determination); structure–activity relationship analysis of 16 analogues; molecular docking to active site |
Molecules |
Medium |
39339346
|
| 2025 |
CNOT7 promotes radiation resistance in colorectal cancer by stabilizing XRCC6 protein: CNOT7 interacts with XRCC6 and inhibits TRIM21-mediated K48-linked ubiquitination at lysine 526 of XRCC6, preventing its proteasomal degradation and facilitating NHEJ-mediated DNA double-strand break repair. Additionally, CNOT7 uses its deadenylase activity to accelerate TRIM21 mRNA degradation, reducing TRIM21 levels. |
Co-immunoprecipitation (CNOT7–XRCC6 interaction); ubiquitination assay (K48-linkage at K526); CNOT7 KD in vitro and in vivo (xenograft); mRNA stability assay for TRIM21; DSB repair assays; PDX tumor models |
Cell death & disease |
High |
41249119
|
| 2025 |
High-throughput screening of 10,880 compounds identified 15 small-molecule inhibitors of CNOT7/Caf1 poly(A)-selective nuclease activity with IC50 values below 25 μM, providing chemical tools to differentiate catalytic from non-catalytic roles of CNOT7. |
Fluorescence-based biochemical nuclease assay screen; molecular docking for binding mode prediction |
Biomolecules |
Low |
41301481
|