| 1993 |
TFII-I defines an alternative transcription initiation pathway through direct binding to the initiator (Inr) element, forming preinitiation complexes distinct from those formed with TFIIA; TBP binds cooperatively with TFII-I at Inr-containing TATA-less promoters, enabling a TFIID-dependent pathway at TATA-less promoters. |
In vitro transcription reconstitution, preinitiation complex assembly assays, sequential factor addition |
Nature |
High |
8377828
|
| 1993 |
Myc interacts physically with TFII-I and inhibits TFII-I-dependent transcription initiation selectively, correlating with prevention of TBP–TFII-I–promoter complex formation; this inhibition is specific to the TFII-I-dependent (not TFIIA-dependent) initiation pathway. |
In vitro transcription assay, protein–protein interaction (co-immunoprecipitation/pulldown), preinitiation complex formation assays |
Nature |
High |
8377829
|
| 1997 |
TFII-I encodes a 120 kDa polypeptide containing six directly repeated ~90-residue I-repeat motifs each with a helix-loop/span-helix structure; recombinant TFII-I binds independently to both Inr and E-box elements, and acts synergistically with USF1 to activate transcription in vivo through both elements of the adenovirus major late promoter. |
cDNA cloning, ectopic expression, DNA-binding assays, in vivo transcription reporter assays, domain analysis of USF1 |
The EMBO journal |
High |
9384587
|
| 1997 |
TFII-I (identified as SPIN) interacts with serum response factor (SRF) and Phox1 in vitro and in vivo, promotes formation of stable higher-order SRF/Phox1/DNA complexes, and binds multiple sequences in the c-fos promoter to cooperate with Phox1 for serum-inducible transcription through the c-fos SRE. |
Protein purification, molecular cloning, in vitro binding assays, co-immunoprecipitation, cotransfection reporter assays |
Genes & development |
High |
9334314
|
| 1997 |
BAP-135 (TFII-I/GTF2I) is associated with Bruton's tyrosine kinase (Btk) in B cells via the Btk pleckstrin homology (PH) domain; it is a direct substrate for Btk-mediated tyrosine phosphorylation and is transiently phosphorylated on tyrosine following BCR crosslinking. |
Co-immunoprecipitation, in vitro kinase assay, PH domain binding mapping, BCR crosslinking experiment |
Proceedings of the National Academy of Sciences of the United States of America |
High |
9012831
|
| 1998 |
TFII-I is required for efficient expression of the TATA-less, Inr-containing murine T-cell receptor Vβ5.2 promoter in vivo; an N-terminal protease-resistant DNA-binding fragment (p70) acts as a dominant negative inhibitor of Inr-specific function, demonstrating that the Inr-specific transcriptional function of TFII-I is dictated by its N-terminal domain and not its C-terminal activation domain. |
Transient transfection reporter assays, dominant-negative mutant analysis, ectopic expression of N-terminal fragment |
Molecular and cellular biology |
Medium |
9671454
|
| 1998 |
TFII-I is phosphorylated in vivo on both serine/threonine and tyrosine residues basally; mutation of a consensus tyrosine phosphorylation site severely reduces TFII-I-mediated basal transcriptional activation of the Vβ promoter in vivo, while phosphorylation does not affect DNA binding. |
In vivo phosphorylation assays (metabolic labeling), site-directed mutagenesis, transcription reporter assays |
The Journal of biological chemistry |
Medium |
9837922
|
| 1998 |
TFII-I enhances c-fos promoter activation through binding to the SIE and SRE upstream elements; it forms in vivo protein–protein complexes with SRF, STAT1, and STAT3; growth factor stimulation enhances tyrosine phosphorylation of TFII-I; and the Ras/MAPK pathway is required for TFII-I activity on the c-fos promoter. |
Co-immunoprecipitation, transient transfection reporter assays, site-directed mutagenesis, in vivo tyrosine phosphorylation assay |
Molecular and cellular biology |
Medium |
9584171
|
| 1999 |
TFII-I constitutively associates with wild-type and kinase-inactive Btk but not xid Btk (R28C PH domain mutation) in vivo; Btk's kinase domain is required to enhance TFII-I tyrosine phosphorylation and transcriptional activity; BCR crosslinking causes dissociation of TFII-I from Btk and increased nuclear import of TFII-I in wild-type but not xid B cells. |
Co-immunoprecipitation, transient transfection reporter assays, nuclear/cytoplasmic fractionation, BCR crosslinking |
Molecular and cellular biology |
High |
10373551
|
| 2000 |
TFII-I forms stable homo- and heteromeric complexes via both its N-terminal region (containing a leucine zipper-like motif) and its I-repeats; complex formation aids nuclear translocation of TFII-I; co-expression of different isoforms leads to enhanced basal but attenuated signal-responsive transcriptional activity. |
Co-immunoprecipitation, nuclear/cytoplasmic fractionation, isoform-specific antibodies, reporter transcription assays |
The Journal of biological chemistry |
Medium |
10854432
|
| 2000 |
TFII-I has two distinct DNA-binding regions; deletion of either abolishes DNA binding and transcriptional activation; I-repeats mediate homomeric interactions individually or in combination; an additional homomeric interaction domain resides within the N-terminal leucine zipper region. |
Deletion mutagenesis, DNA-binding assays, transcription reporter assays, protein–protein interaction assays |
The Journal of biological chemistry |
Medium |
11113127
|
| 2000 |
ERK forms an in vivo complex with TFII-I through a consensus MAP kinase interaction domain (D-box) in TFII-I; ERK phosphorylates TFII-I in vitro at Ser627 and Ser633; mutation of the D-box or the ERK phosphorylation sites impairs TFII-I binding to ERK and its ability to enhance the c-fos promoter; serum stimulation enhances TFII-I–ERK complex formation. |
Co-immunoprecipitation, in vitro kinase assay, point mutagenesis, dominant-negative Ras, reporter assays |
Molecular and cellular biology |
High |
10648599
|
| 2001 |
TFII-I is identified as the ERSE-binding factor (ERSF) that binds the ER stress response element (ERSE) in the grp78 and ERp72 promoters; purified recombinant TFII-I isoforms bind directly to ERSEs; ER stress (thapsigargin) increases TFII-I transcript and protein levels in the nucleus; TFII-I tyrosine phosphorylation sites are required for its activation of the Grp78 promoter; TFII-I physically interacts with ATF6 and is required for optimal ATF6-mediated ERSE stimulation. |
Chromatographic purification, protein microsequencing, recombinant protein binding assays, co-immunoprecipitation, reporter assays, stable knockdown |
Molecular and cellular biology |
High |
11287625
|
| 2001 |
JAK2 phosphorylates TFII-I at Tyr248 in vivo and in vitro; this phosphorylation event is required for TFII-I interaction with ERK and for TFII-I activity on the c-fos promoter; dominant-negative JAK2 or JAK2 inhibitor AG490 abolishes TFII-I activity on c-fos. |
In vitro kinase assay, co-immunoprecipitation, site-directed mutagenesis (Y248F), dominant-negative JAK2 expression, reporter assays |
Molecular and cellular biology |
High |
11313464
|
| 2001 |
Btk phosphorylates BAP/TFII-I predominantly at Tyr248, Tyr357, and Tyr462 in vitro and in vivo; mutation of any single site reduces c-fos promoter transcription, consistent with phosphorylation at these sites contributing to transcriptional activation. |
Site-directed mutagenesis, phosphopeptide mapping, in vitro kinase assay, co-expression with Btk in mammalian cells, reporter assays |
The Journal of biological chemistry |
High |
11373296
|
| 2002 |
HDAC3 copurifies with TFII-I in immunoaffinity purification, co-immunoprecipitates with TFII-I, and colocalizes with it; the HDAC3–TFII-I interaction requires the C-terminal region of HDAC3 (residues 373–401) and residues 363–606 of TFII-I; an anti-TFII-I immunoprecipitate contains HDAC3 enzymatic activity; overexpression of HDAC3 severely reduces TFII-I transcriptional activation. |
Immunoaffinity purification, co-immunoprecipitation, GST pull-down, indirect immunofluorescence colocalization, HDAC enzymatic activity assay, deletion mutagenesis |
The Journal of biological chemistry |
High |
12393887
|
| 2002 |
TFII-I and HDAC3 physically and functionally interact; PIASxβ (an E3 SUMO ligase) interacts with both TFII-I and HDAC3, relieves HDAC3-mediated repression of TFII-I transcriptional activation, suggesting SUMO pathway cross-talk with histone deacetylation at TFII-I target promoters. |
Co-immunoprecipitation, subcellular colocalization, transcription reporter assays |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
12239342
|
| 2002 |
cGMP-dependent protein kinase Iβ (PKG Iβ) physically interacts with TFII-I via the N-terminal 93 amino acids of PKG Iβ and one of the six I-repeats of TFII-I; PKG phosphorylates TFII-I in vitro and in vivo at Ser371 and Ser743; mutation of these sites abolishes PKG-mediated enhancement of TFII-I transactivation of an SRE-containing promoter. |
Yeast two-hybrid screen, in vitro binding with purified recombinant proteins, co-immunoprecipitation, in vitro kinase assay, site-directed mutagenesis, reporter assays |
The Journal of biological chemistry |
High |
12082086
|
| 2002 |
PIASxβ/Miz1 (SUMO E3 ligase) interacts with TFII-I and with hMusTRD1/BEN; ectopic PIASxβ augments TFII-I transcriptional activity and relieves BEN-mediated repression; nuclear-localization-deficient PIASxβ fails to alter TFII-I subcellular localization. |
Yeast two-hybrid screen, co-immunoprecipitation in mammalian cells, reporter transcription assays, localization studies |
The Journal of biological chemistry |
Medium |
12193603
|
| 2002 |
c-Src phosphorylates TFII-I at Tyr248 and Tyr611 in a growth-factor-dependent manner; phosphorylated TFII-I translocates to the nucleus where it activates a stably integrated c-fos reporter; phosphorylation-deficient mutants (Y248F, Y611F) fail to activate the c-fos promoter; signal withdrawal leads to loss of nuclear TFII-I. |
In vivo tyrosine phosphorylation assays, site-directed mutagenesis, nuclear/cytoplasmic fractionation, stable c-fos reporter cell lines |
The Journal of biological chemistry |
High |
11934902
|
| 2001 |
The TFII-I-related factor MusTRD1/BEN represses TFII-I transcriptional activity by excluding TFII-I from the nucleus when co-expressed; mutation of a nuclear localization signal in MusTRD1/BEN reverses this nuclear exclusion and restores c-fos promoter activity. |
Ectopic co-expression, subcellular localization (fluorescence microscopy), nuclear/cytoplasmic fractionation, reporter assays, NLS mutagenesis |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
11438732
|
| 2003 |
The N-terminal ~90-amino acid region of TFII-I (including a leucine zipper motif) is primarily responsible for its physical interaction with Btk; Btk tethers TFII-I to the cytoplasm by preventing dimerization and nuclear localization; Src-dependent TFII-I tyrosine phosphorylation sites are distinct from those targeted by Btk, indicating two independent kinase pathways converge on TFII-I. |
Structural analysis with TFII-I deletion/point mutants, co-immunoprecipitation, nuclear/cytoplasmic fractionation |
The Journal of biological chemistry |
Medium |
14623887
|
| 2005 |
TFII-I forms a complex with Smad2 upon TGFβ/activin stimulation, is recruited to the distal element (DE) of the goosecoid (Gsc) promoter, and activates Gsc transcription; siRNA knockdown of TFII-I abolishes TGFβ-mediated Gsc induction; in Xenopus, antisense knockdown of TFII-I decreases Gsc expression; BEN constitutively occupies the DE in the absence of TGFβ and is replaced by the TFII-I/Smad2 complex upon stimulation. |
Co-immunoprecipitation, chromatin immunoprecipitation, siRNA knockdown, reporter assays, Xenopus antisense experiments |
Molecular and cellular biology |
High |
16055724
|
| 2005 |
TGFβ1 stimulates TFII-I phosphorylation at Ser371 and Ser743; mutation of these sites (S371A/S743A) enhances complex formation between TFII-I and Smad3 and increases their cooperative transcriptional regulation of cyclin D2, cyclin D3, and E2F2 genes. |
Phosphoproteome profiling, site-directed mutagenesis, co-immunoprecipitation, microarray expression analysis, luciferase reporter assay |
Molecular biology of the cell |
Medium |
16055503
|
| 2005 |
TFII-I is phosphorylated at Tyr248 by c-Src in response to thapsigargin (ER stress); c-Src activation by ER stress stimulates Grp78 promoter activity via TFII-I; stable cells with suppressed TFII-I levels show reduced Grp78 induction; ChIP demonstrates enhanced TFII-I binding to the Grp78 promoter upon ER stress. |
In vivo phosphorylation assays (phospho-specific antibodies), stable TFII-I knockdown, chromatin immunoprecipitation, reporter assays |
The Journal of biological chemistry |
High |
15664986
|
| 2005 |
TFII-I binds the VEGFR-2/KDR Inr element and three regulatory E-boxes in the VEGFR-2 promoter; siRNA-mediated reduction of TFII-I decreases endogenous VEGFR-2 expression; TFII-I can act at both basal Inr and upstream regulatory sites of the same promoter; TFII-IRD1 counter-regulates the same promoter. |
Gel shift assays, siRNA knockdown, reporter assays, mutagenesis of Inr and E-boxes |
The Journal of biological chemistry |
Medium |
15941713
|
| 2005 |
PKG Iβ interaction with TFII-I requires a cluster of acidic amino acids in the PKG Iβ N-terminal leucine zipper (D26/E31); mutation D26K/E31R abrogates binding to TFII-I; basic residues in TFII-I within a putative α-helical region mediate binding to PKG Iβ. |
Site-directed mutagenesis, in vitro binding assays with purified proteins, co-immunoprecipitation in intact cells |
The Journal of biological chemistry |
Medium |
16166082
|
| 2006 |
TFII-I acts outside the nucleus as a negative regulator of agonist-induced calcium entry (ACE) by suppressing surface accumulation of TRPC3 channels; this inhibition requires phosphotyrosine residues that engage SH2 domains of PLCγ and a PH-like domain of TFII-I that binds the split PH domain of PLCγ, suggesting TFII-I competes with TRPC3 for PLCγ binding. |
Calcium entry assays, surface expression of TRPC3, domain mapping, phosphotyrosine-dependent interaction assays with PLCγ SH2 domains |
Science |
High |
17023658
|
| 2006 |
TFII-I directly interacts with Bright/ARID3a through Bright's protein interaction domain; specific tyrosine residues of TFII-I are essential for Bright-induced immunoglobulin reporter gene activity; TFII-I knockdown in B cells reduces heavy-chain transcript levels. |
Co-immunoprecipitation, siRNA knockdown, reporter assays, site-directed mutagenesis |
Molecular and cellular biology |
Medium |
16738337
|
| 2007 |
TFII-I promotes B cell growth arrest in a signal-dependent manner by controlling c-Myc transcription and regulating NF-κB; loss of TFII-I function leads to up-regulation of c-Myc and down-regulation of p21 and p27, as well as increased nuclear c-rel and decreased p50 NF-κB DNA-binding activity. |
Stable post-transcriptional silencing (shRNA), immunoblotting, EMSA for NF-κB subunits, cell proliferation/apoptosis assays |
Journal of immunology |
Medium |
17312101
|
| 2007 |
USF1, USF2, and TFII-I bind cooperatively to the HIV-1 LTR RBEIII element and are required for induction of latent integrated HIV-1 in response to T-cell receptor signaling; TFII-I stimulates USF1/USF2 binding to RBEIII ~160-fold less efficiently without TFII-I; dominant-interfering TFII-I inhibits induction; MAPK pathway is essential for induction. |
Electrophoretic mobility shift assay, chromatin immunoprecipitation, dominant-interfering constructs, T-cell receptor crosslinking, MEK inhibitor treatment |
Virus genes |
Medium |
15767439 17546494
|
| 2008 |
TFII-I forms a complex with PARP1 and SFPQ that binds to the DYX1C1 promoter SNP rs3743205; electrophoretic mobility shift assays show allele-specific TFII-I binding; luciferase assays show allelic differences in DYX1C1 promoter activity linked to the TFII-I binding site. |
Electrophoretic mobility shift assay, mass spectrometry identification of protein complex, protein sequencing, luciferase reporter assays |
FASEB journal |
Medium |
18445785
|
| 2009 |
TFII-I is recruited to the cyclin D1 promoter under normal growth conditions and transcriptionally activates it; upon genotoxic stress and p53 activation, TFII-I is ubiquitinated and degraded by the proteasome in a p53- and ATM-dependent manner; stable TFII-I expression increases cyclin D1 levels, accelerates S-phase entry/exit, and overcomes p53-mediated cell cycle arrest; these effects require tyrosine phosphorylation at Tyr248 and Tyr611. |
Chromatin immunoprecipitation, ubiquitination assays, proteasome inhibitor experiments, stable cell lines, flow cytometry, site-directed mutagenesis |
Molecular and cellular biology |
High |
16314517
|
| 2009 |
TFII-I silencing causes unexpected defects in S-phase progression (delay entering and executing S-phase and entry into G2/M); microarray and functional validation identify cyclin D1 and PKC-β as major downstream transcriptional targets; Cdk1 phosphorylates TFII-I at the G2/M boundary, likely displacing it from condensed chromatin. |
siRNA knockdown, flow cytometry (cell cycle analysis), microarray, functional validation assays, Cdk1 phosphorylation assay |
Cell cycle |
Medium |
19182516
|
| 2009 |
Inducible tyrosine kinase (Itk) physically interacts with TFII-I in T cells; Itk phosphorylates TFII-I upon T-cell receptor crosslinking; kinase-dead or R29C mutant Itk fails to phosphorylate TFII-I; Itk potentiates TFII-I-driven c-fos transcription; the first 90 N-terminal residues of TFII-I are dispensable for Itk binding. |
Co-immunoprecipitation, phosphorylation assays (TCR crosslinking), dominant-negative Itk expression, reporter assays, N-terminal deletion mapping |
European journal of immunology |
Medium |
19701889
|
| 2011 |
OCA-B directly interacts with TFII-I (which binds DICE elements in Igh promoters); OCA-B relieves HDAC3-mediated Igh promoter repression by competing with HDAC3 for binding to promoter-bound TFII-I; Igh 3' enhancer-bound OCA-B and promoter-bound TFII-I mediate promoter–enhancer looping interactions in both cis and trans, required for Igh transcription. |
Co-immunoprecipitation, chromatin immunoprecipitation, chromosome conformation capture (looping assay), reporter assays, competition binding assays |
Molecular cell |
High |
21549311
|
| 2014 |
Rev7 (regulatory subunit of Pol ζ) binds to TFII-I; TFII-I is required for translesion synthesis (TLS) and DNA damage tolerance independent of its transcription function; TLS function of TFII-I requires homodimerization and binding to PCNA, suggesting TFII-I bridges PCNA and Pol ζ. |
Co-immunoprecipitation, TLS functional assays, homodimerization mutants, PCNA-binding assays |
PLoS genetics |
Medium |
24922507
|
| 2015 |
TFII-I interacts with CTCF in a distinct chromatin-bound complex; TFII-I is essential for directing CTCF binding to promoter-proximal regions of metabolic genes across the genome; knockdown of TFII-I reduces CTCF binding, diminishes CDK8 recruitment, and attenuates RNA Pol II Ser5 phosphorylation at co-regulated genes. |
Mass spectrometry of CTCF interactors, biochemical fractionation, ChIP-seq, siRNA knockdown, Pol II phosphorylation assay |
Proceedings of the National Academy of Sciences of the United States of America |
High |
25646466
|
| 2015 |
TFII-I is SUMOylated at K221 and K240 by SUMO1; PIAS4 acts as the E3 ligase for TFII-I SUMOylation; SENP2 deSUMOylates TFII-I; SUMOylation reduces TFII-I binding to HDAC3, thereby promoting TFII-I transcriptional activity; SUMOylation is critical for TFII-I-driven cell proliferation and colony formation. |
Large-scale proteomics/IP-Western blot validation, site-directed mutagenesis (K221R, K240R), immunoprecipitation, cell proliferation assays, colony formation assays |
Journal of proteome research |
Medium |
25869096
|
| 2016 |
Adenovirus E4-ORF3 stimulates SUMOylation of TFII-I early during infection, then triggers its ubiquitination and proteasomal degradation; E4-ORF3 is required for TFII-I ubiquitination; degradation of TFII-I by E4-ORF3 stimulates activity of a TFII-I-repressed viral promoter. |
Co-immunoprecipitation, ubiquitination assays, proteasome inhibitor experiments, reporter assays, infection experiments |
mBio |
Medium |
26814176
|
| 2019 |
Selective deletion of Gtf2i in excitatory neurons of the mouse forebrain causes reduced mature oligodendrocyte numbers, reduced myelin thickness, and impaired axonal conductivity; ~70% of genes with decreased mRNA in mutant cortex are myelination-related; restoring myelination with clemastine or increasing axonal conductivity rescued the behavioral deficits (increased sociability, fine motor deficits, anxiety). |
Conditional neuron-specific knockout, mRNA-seq, electron microscopy of myelin, electrophysiology, pharmacological rescue with clemastine |
Nature neuroscience |
High |
31011227
|
| 2023 |
GTF2I dosage controls dynamics of neural progenitor proliferation and excitatory neuron differentiation in cortical organoids; 7q11.23 duplication (extra GTF2I copy) causes precocious excitatory neuron production rescued by restoring physiological GTF2I levels; GTF2I acts through LSD1 (lysine demethylase 1) as a downstream effector, and LSD1 inhibition rescues ASD-like behaviors in transgenic Gtf2i-duplication mice. |
Patient-derived cortical organoids, single-cell RNA-seq, proteomics, transgenic mouse model, LSD1 inhibitor treatment, behavioral assays |
Science advances |
High |
38019906
|
| 2020 |
The GTF2I L424H knock-in mutation in thymic epithelial cells causes cell transformation, aneuploidy, and increased tumor growth; mutant TFII-I upregulates glycolytic enzymes and cyclooxygenase-2 (COX-2), and COX-2 upregulation is required for cell survival under metabolic stress and for cellular transformation. |
Gtf2i L424H knock-in cells, transcriptome analysis, cell transformation assays, COX-2 functional inhibition, metabolic stress assays |
Cell death and differentiation |
Medium |
32034314
|
| 2022 |
Conditional knock-in of Gtf2i L424H in Foxn1+ thymic epithelial cells impairs thymic medulla development and maturation of medullary thymic epithelial cells (mTECs), causes enrichment of E2F/MYC target gene signatures, and leads to thymoma formation in aged mice, establishing the mutation as a driver of thymic epithelial transformation. |
Conditional knock-in mouse model, digital spatial transcriptomic profiling (GeoMx), immunohistochemistry, TCR repertoire analysis |
Journal of thoracic oncology |
Medium |
36049655
|
| 2008 |
TFII-I interacts with Elongin A (identified by pull-down assay); TFII-I binds upstream and downstream of transcription start sites at active and repressed genes respectively; at the ATF3 stress-responsive gene, TFII-I is required for induction of transcription and correlates with increased Pol II and Elongin A association, implicating TFII-I in transcription elongation. |
Biotinylation-tagging ChIP-seq, pull-down assays, siRNA knockdown, Pol II/Elongin A ChIP |
Nucleic acids research |
Medium |
24875474
|