| 2000 |
SPBP (TCF20) is a nuclear multidomain protein containing an N-terminal transactivating region, a novel DNA-binding domain with an AT-hook motif, a bipartite nuclear localization signal, and a C-terminal zinc finger domain of the trithorax family. It functions as a transcriptional coactivator, enhancing the transcriptional activity of c-Jun, Ets1, Sp1, and Pax6 in cotransfection experiments. |
Functional domain mapping by deletion analysis, cotransfection reporter assays, PCR analyses of multitissue cDNA panels, cDNA cloning and sequencing |
The Journal of biological chemistry |
Medium |
10995766
|
| 2000 |
SPBP (TCF20) physically interacts with the RING finger protein RNF4; both are ubiquitously expressed nuclear proteins. RNF4 facilitates accumulation of specific SPBP-DNA complexes in vitro and acts as a positive cofactor in SPBP-mediated transactivation. SPBP's internal PHD/LAP-type zinc finger domain can form intra-chain protein-protein contacts that negatively modulate the SPBP-RNF4 interaction. |
In vitro binding assays (EMSA), cotransfection transactivation assays, domain mapping of the PHD/LAP zinc finger interaction |
The Journal of biological chemistry |
Medium |
10849425
|
| 2005 |
SPBP (TCF20) is recruited exclusively to the phosphorylated form of estrogen receptor alpha (ERα) AF1 domain. In a purified system, SPBP bound only in vitro-phosphorylated ERα AF1 or the phosphoserine mimic S118E, with the interaction domain mapped to a 42-amino-acid fragment of SPBP. In cells, SPBP preferentially interacted with liganded and phosphorylated ERα and functioned as a repressor of activated ERα, inhibiting proliferation of ERα-dependent breast cancer cell lines. |
Phage display screen for phosphoserine-specific binders, in vitro binding assay with purified proteins and phosphoserine mimic, co-immunoprecipitation in cells, cell proliferation assay |
Molecular and cellular biology |
High |
15831449
|
| 2007 |
SPBP (TCF20) physically interacts with TopBP1 via the ePHD domain of SPBP and the BRCT6 domain of TopBP1. Together they cooperate as co-activators of Ets1 on c-myc P1P2 and MMP3 promoters with more-than-additive effect. Both proteins associate with these promoters. Depletion of SPBP by siRNA reduced MMP3 secretion by 50% in phorbol ester-stimulated human fibroblasts. |
Yeast two-hybrid screen, in vitro binding confirmation, co-immunoprecipitation in vivo, chromatin immunoprecipitation (ChIP), reporter assays, siRNA knockdown |
Nucleic acids research |
High |
17913746
|
| 2011 |
SPBP (TCF20) acts as a transcriptional coactivator of the androgen receptor (AR), enhancing AR activity on the probasin promoter. Pax6 represses AR-mediated transactivation by competing with SPBP for binding to AR, reducing SPBP recruitment to the probasin promoter. The interaction between AR and SPBP, and between AR and Pax6, was mapped to the DNA-binding domains of the respective proteins. |
Cotransfection reporter assays, chromatin immunoprecipitation (ChIP), co-immunoprecipitation and domain-mapping binding studies |
PloS one |
Medium |
21935435
|
| 2012 |
SPBP (TCF20) contains two independent nucleosome-binding domains: a novel core nucleosome-interaction domain at residues 1551–1666 (adjacent to the AT-hook motif) and the C-terminal ePHD/ADD domain that associates with nucleosomes in a histone tail-dependent manner. The 1551–1666 region is critically important for proper nuclear localization of SPBP. Both SPBP and its homologue RAI1 are strongly enriched on chromatin in interphase HeLa cells and display low nuclear mobility. |
In vitro nucleosome-binding assays with domain deletion constructs, fluorescence recovery after photobleaching (FRAP), nuclear fractionation, immunofluorescence |
The Biochemical journal |
High |
22081970
|
| 2013 |
The ePHD/ADD-like domain and novel nucleosome-binding domain of SPBP (TCF20) are highly conserved in vertebrate evolution. In vitro and yeast-cell interaction studies showed the C-terminal region adopts a cross-braced topology of zinc finger interactions similar to other structurally determined ePHD/ADD domains. Experimental data confirmed that the conserved novel nucleosome-binding region of RAI1 (homologue) can bind nucleosome core and histones. |
Phylogenetic analysis, in vitro interaction studies, yeast cell interaction assays, evolutionary conservation analysis |
PloS one |
Medium |
24205348
|
| 2014 |
SPBP (TCF20) functions as a transcriptional coactivator of NRF2. Sulforaphane induces SPBP expression, and SPBP stimulates p62/SQSTM1 expression via ARE elements in its promoter. siRNA-mediated knockdown of SPBP significantly decreases p62/SQSTM1 expression and p62 body formation in HeLa cells, and reduces sulforaphane-induced NRF2 and LC3B expression. Overexpressed SPBP and NRF2 act synergistically on the p62/SQSTM1 promoter and colocalize in nuclear speckles. |
Reporter gene assays (ARE-driven promoters), siRNA knockdown with immunofluorescence and Western blot, cotransfection synergy assay, colocalization by fluorescence microscopy |
PloS one |
Medium |
24416372
|
| 2014 |
TCF20 is a transcriptional coregulator structurally and functionally related to RAI1; de novo and rare inherited loss-of-function mutations in TCF20 are associated with autism spectrum disorder. A de novo missense and frameshift mutations in TCF20 were identified, supporting TCF20 as an ASD-associated gene. |
Cytogenetic characterization (FISH, Southern blotting, inverse PCR), Sanger sequencing of TCF20 open reading frames, exome sequencing |
Journal of medical genetics |
Low |
25228304
|
| 2020 |
TCF20 is essential for cortical neurogenesis in mice. TCF20 deletion reduces neuron number and causes abnormal brain function. ChIP-qPCR and transcriptome analysis identified TDG (DNA demethylation factor) as a downstream target gene of TCF20. TDG controls DNA methylation at the TCF-4 promoter, affecting TCF-4 expression and neural differentiation. Overexpression of TDG or TCF-4 rescues neurogenesis deficits caused by TCF20 knockdown. |
Conditional knockout mouse model, RNA-seq transcriptome analysis, ChIP-qPCR, rescue experiments by overexpression, immunofluorescence |
EMBO reports |
High |
32510763
|
| 2022 |
TCF20 forms a complex with MeCP2 at the chromatin interface. RTT-causing mutations in MECP2 disrupt the MeCP2-TCF20 interaction. TCF20 and MeCP2 are highly coexpressed in neurons and coregulate key neuronal gene expression. Reducing Tcf20 partially rescued behavioral deficits caused by MECP2 overexpression in mice (MECP2 duplication syndrome model). A PHF14 missense mutation in a patient abolishes the MeCP2-PHF14-TCF20 interaction. |
Proximity-dependent biotinylation (BioID) proteomics, co-immunoprecipitation, genetic epistasis in mouse behavioral model (Tcf20 reduction in MECP2 overexpression mice), patient mutation functional validation |
Proceedings of the National Academy of Sciences of the United States of America |
High |
35074918
|
| 2023 |
Tcf20 knockout in mice results in impaired neural development and neonatal death. Heterozygous Tcf20 mice show higher CCl4-induced liver fibrosis and differential expression of extracellular matrix homeostasis genes, along with autism-like behavioral phenotypes. Tcf20-null embryonic livers and MEF cells show differential expression of mitochondrial oxidative phosphorylation proteins, increased mitochondrial metabolic activity, and altered citric acid cycle metabolites. |
Homologous recombination knockout mouse, Seahorse metabolic analysis, gas chromatography-mass spectrometry proteomics, gene expression analysis, behavioral phenotyping |
Liver international |
Medium |
37312667
|
| 2025 |
TCF20 plays a central role in dendritic arborization and dendritic spine formation in neurons. TCF20 knockdown in rat cortical cultures causes downregulation of pre- and postsynaptic pathways and reduced levels of GABRA1, BDNF, PSD-95, c-Fos, GluN2B, and GABRA5, with upregulation of GluA2, in both total homogenates and synaptosomal preparations. |
siRNA knockdown in rat cortical cultures, RNA sequencing, Western blot of synaptosomal fractions, immunofluorescence for dendritic morphology |
Journal of neurochemistry |
Medium |
39801227
|
| 2025 |
The MeCP2-TCF20 complex directly suppresses HDAC1 expression in periodontal ligament stem cells, thereby activating the Wnt/β-catenin signaling pathway and promoting osteogenic differentiation. M2 macrophage-derived exosomes activate the MeCP2-TCF20 complex in this context. |
Immunoprecipitation-mass spectrometry (IP-MS), RNA sequencing, siRNA knockdown and overexpression validation, Western blot, ALP/ARS osteogenic assays |
Stem cell research & therapy |
Medium |
41094547
|
| 2024 |
The TCF20/PHF14 chromatin complex in the mammalian brain includes MeCP2, RAI1, TCF20, PHF14, and HMG20A, and plays a role in epigenetic and transcriptional regulation. Mutations in genes encoding components of this complex are linked to neurodevelopmental disorders. |
Review and synthesis of existing experimental findings from prior BioID, co-IP, and genetic studies (no new primary experiments reported in this review paper) |
Genes |
Low |
39766920
|