| 1997 |
FBI-1 (ZBTB7A) was purified as a cellular factor that specifically binds to the HIV-1 inducer of short transcripts (IST), a bipartite DNA element downstream of the HIV-1 transcriptional start site; binding of FBI-1 to IST correlates with the ability of IST mutants to direct abortive (short) transcript synthesis, suggesting FBI-1 promotes transcription elongation blocks. |
Biochemical purification, specific protein-DNA crosslinking, EMSA with IST mutants |
Molecular and cellular biology |
High |
9199312
|
| 1999 |
FBI-1 (ZBTB7A) contains an N-terminal POZ/BTB domain and four C-terminal Krüppel-type zinc fingers; the C-terminus is sufficient for specific DNA binding, and FBI-1 forms homomers through its POZ domain (and in vivo through its zinc finger domain); FBI-1 also physically associates with HIV-1 Tat protein. |
cDNA cloning, domain deletion analysis, in vivo homomer detection, co-immunoprecipitation with Tat |
Nucleic acids research |
High |
9973611
|
| 2002 |
The POZ domain of FBI-1 (ZBTB7A) directly interacts with the zinc finger DNA-binding domain of Sp1, preventing Sp1 from binding GC boxes on the ADH5/FDH promoter, thereby repressing transcription; this mechanism was shared by the POZ domains of PLZF and BCL-6. |
GST pull-down (POZ domain fusions), EMSA, DNase I footprinting, ChIP, Gal4 fusion reporter assay |
The Journal of biological chemistry |
High |
12004059
|
| 2002 |
FBI-1 stimulates HIV-1 Tat-activated transcription; this effect requires the same FBI-1 domain that mediates physical Tat–FBI-1 association in vivo. FBI-1 partially co-localizes with Tat and P-TEFb (Cdk9/CyclinT1) at nuclear speckles, and its nuclear distribution depends on its DNA-binding domain, cellular DNA, and active transcription. |
Transcription reporter assay, co-immunoprecipitation, confocal microscopy/immunofluorescence co-localization |
Molecular biology of the cell |
Medium |
11907272
|
| 2003 |
FBI-1 (ZBTB7A) binds to inverted, direct, and everted sequence repeats with the consensus G(A/G)GGG(T/C)(C/T)(T/C)(C/T) with high flexibility in orientation and spacing, indicating highly flexible DNA recognition by a POZ-domain protein. |
EMSA with multiple viral and cellular binding sites, sequence analysis |
The Journal of biological chemistry |
Medium |
12750370
|
| 2003 |
FBI-1 (ZBTB7A) is induced during early human and murine preadipocyte differentiation and promotes adipogenesis; stably overexpressing FBI-1 in 3T3-L1 cells accelerated differentiation markers and lipid accumulation while reducing DNA synthesis and cyclin A expression, placing FBI-1 as a dual regulator switching cells from proliferation to differentiation. |
Stable cell line overexpression, quantification of differentiation markers, lipid accumulation assay, cell proliferation assay, cyclin A protein measurement |
The Journal of biological chemistry |
Medium |
14701838
|
| 2005 |
Pokemon/ZBTB7A directly represses ARF tumor suppressor gene transcription through direct promoter binding; mouse embryonic fibroblasts lacking Zbtb7 are completely refractory to oncogene-mediated transformation, and Pokemon overexpression causes oncogenic transformation in vitro and in transgenic mice. |
ChIP, promoter reporter assay, MEF transformation assay, Zbtb7 knockout MEFs, transgenic mouse model |
Nature |
High |
15662416
|
| 2005 |
FBI-1 (ZBTB7A) interacts with the Rel homology domain of NF-κB p65 via its POZ domain in vivo and in vitro, enhances NF-κB-mediated E-selectin gene transcription, promotes nuclear localization and stability of p65, and also interacts with IκBα and IκBβ. |
Co-immunoprecipitation (in vivo and in vitro protein-protein interaction), luciferase reporter assay, confocal microscopy |
The Journal of biological chemistry |
Medium |
15917220
|
| 2006 |
The BTB/POZ domain of human LRF/ZBTB7A adopts the canonical BTB homodimer fold; the lateral groove and charged pocket on the homodimer surface differ substantially from BCL6 BTB, and the 17-residue BCL6 Binding Domain (BBD) of SMRT co-repressor does not bind to the LRF BTB domain. |
X-ray crystallography (2.1 Å), in vitro binding assay (BBD peptide binding test) |
Protein science |
High |
17189472
|
| 2008 |
FBI-1 (ZBTB7A) represses Rb gene transcription by binding to four GC-rich FBI-1-response elements (FREs) in the Rb promoter and by competing with Sp1 at GC-box 2 and FRE3; repression involves recruitment of a co-repressor–HDAC complex through the POZ domain, leading to deacetylation of H3 and H4 histones at the Rb promoter. FBI-1 also inhibits C2C12 myoblast differentiation by repressing Rb. |
ChIP, EMSA, luciferase reporter assay, site-directed mutagenesis, histone deacetylation assay, myoblast differentiation assay |
The Journal of biological chemistry |
High |
18801742
|
| 2008 |
FBI-1 (ZBTB7A) and SREBP-1 interact directly via their DNA-binding domains and synergistically activate FASN gene transcription; FBI-1 alters the binding pattern of Sp1 and SREBP-1 on GC-box and SRE/E-box elements to drive higher Sp1 binding to the proximal FASN promoter. |
Co-immunoprecipitation, luciferase reporter assay, ChIP, EMSA, co-transfection experiments |
The Journal of biological chemistry |
Medium |
18682402
|
| 2008 |
FBI-1 (ZBTB7A) acts as a dual regulator in adipogenesis: it represses cyclin A through an indirect mechanism (inhibiting Sp1 binding at the cyclin A promoter) and represses E2F-4 directly via a FBI-1 binding element; FBI-1 binds Sin3A and HDAC-1 to form a repressor complex through its POZ domain. |
Luciferase reporter assay, EMSA, co-immunoprecipitation, site-directed mutagenesis, POZ domain deletion mutants |
Journal of molecular medicine |
Medium |
18368381
|
| 2009 |
FBI-1 (ZBTB7A) represses p21CIP1 transcription by direct binding to the proximal Sp1-3 GC-box and distal p53-responsive elements, competing with both Sp1 and p53; it also recruits co-repressors mSin3A, NCoR, and SMRT, leading to deacetylation of Ac-H3 and Ac-H4 histones at the p21 promoter. FBI-1 functions as a master controller of the ARF–Hdm2–p53–p21 pathway. |
ChIP, EMSA, luciferase reporter assay, co-immunoprecipitation, histone deacetylation assay |
The Journal of biological chemistry |
High |
19244234
|
| 2009 |
eEF1A/CCS-3 directly interacts with FBI-1 (ZBTB7A) through both the zinc finger and POZ domains of FBI-1; CCS-3 enhances FBI-1-mediated transcriptional repression of p21CIP1 by facilitating interaction with co-repressors SMRT and BCoR at the POZ domain. |
Co-immunoprecipitation, GST pull-down, MALDI-TOF mass spectrometry, immunofluorescence co-localization, luciferase reporter assay |
Cellular physiology and biochemistry |
Medium |
19471103
|
| 2010 |
FBI-1 (ZBTB7A) acts as a co-repressor of the androgen receptor (AR) in prostate cancer cells; FBI-1 physically interacts with AR in a ligand-dependent manner and forms a ternary complex with AR and SMRT, enhancing recruitment of NCoR and SMRT to endogenous PSA upstream sequences. FBI-1-mediated inhibition of AR transcriptional activity is partially dependent on HDAC activity. |
Co-immunoprecipitation, ChIP, luciferase reporter assay, HDAC inhibitor treatment |
Cellular and molecular life sciences |
Medium |
20812024
|
| 2011 |
ZBTB7A/LRF (FBI-1/OCZF) is expressed in osteoclasts, is upregulated by RANKL in primary macrophages, and is required for RANKL-induced osteoclast formation in vitro; transgenic mice overexpressing OCZF under the cathepsin K promoter show decreased bone volume, increased osteoclast number, and promoted osteoclast survival. |
Immunostaining, in situ hybridization, transgenic mouse model (OCZF-Tg), siRNA knockdown of LRF in osteoclast differentiation assay, bone histomorphometry, pQCT |
Arthritis and rheumatism |
High |
21590684
|
| 2011 |
Pokemon/ZBTB7A directly binds GT boxes in the survivin promoter and induces survivin expression in breast cancer cells; ChIP and site-directed mutagenesis confirmed direct promoter binding. |
ChIP, site-directed mutagenesis, DNA microarray, luciferase reporter |
Breast cancer research |
Medium |
21392388
|
| 2011 |
FBI-1 (ZBTB7A) directly activates MT1-MMP promoter transcription by binding the ~600 bp 5'-flanking sequence of MT1-MMP (confirmed by promoter reporter assay and ChIP), leading to enhanced cancer cell migration and invasion; MT1-MMP knockdown abolished FBI-1-mediated invasion. |
ChIP, promoter reporter assay (promoter deletion constructs), siRNA knockdown of MT1-MMP, invasion/migration assay |
Molecular cancer |
Medium |
21176152
|
| 2012 |
Pokemon/ZBTB7A directly binds the Bim promoter and suppresses Bim transcription, rendering liver cells resistant to anoikis; Pokemon knockdown enhances sensitivity to anoikis and chemical apoptotic stress, while ectopic Pokemon expression confers anoikis resistance. |
Dual-luciferase reporter assay, ChIP, siRNA knockdown, flow cytometry, caspase-3 activity assay |
International journal of molecular sciences |
Medium |
22754333
|
| 2012 |
Pokemon/ZBTB7A directly binds the p65 promoter element at -434 to -430 bp and the IκBα promoter element at -453 to -448 bp, activating transcription of both, revealing a homeostatic regulatory role in NF-κB signaling. |
ChIP, targeted mutagenesis, luciferase reporter assay, siRNA knockdown |
Molecular and cellular biochemistry |
Medium |
23054188
|
| 2013 |
FBI-1 (ZBTB7A) directly interacts with MBD3 in the nucleus; through MBD3, FBI-1 recruits the Mi-2/NuRD-HDAC complex to the CDKN1A promoter for epigenetic repression; MBD3 modulates FBI-1 interactions with co-repressors (decreasing NCoR/SMRT interaction, increasing BCoR interaction); BCoR links to DNMTs and HP1, enabling DNA methylation-based silencing of p21WAF/CDKN1A. |
Co-immunoprecipitation, ChIP, EMSA (methylated and non-methylated DNA binding), luciferase reporter assay |
Nucleic acids research |
High |
23658227
|
| 2013 |
ZBTB7A physically interacts with SOX9 and functionally antagonizes SOX9 transcriptional activity on target genes MIA (tumor invasion) and H19 (lncRNA precursor for RB-targeting miRNA); prostate-specific Zbtb7a inactivation accelerates Pten loss-driven tumorigenesis through bypass of Pten loss-induced cellular senescence, Rb downregulation, and invasive cancer. |
Co-immunoprecipitation (physical interaction), conditional knockout mouse model (prostate-specific), RT-PCR/Western blot of target gene expression, histopathological analysis |
Nature genetics |
High |
23727861
|
| 2013 |
Pokemon/ZBTB7A silencing in HCC inhibits the PI3K/Akt and c-Raf/MEK/ERK pathways and modulates cell cycle regulators, suppressing cell proliferation and migration in vitro and tumor growth in xenograft mice. |
Stable shRNA knockdown, Western blot (pathway markers), cell proliferation and migration assays, xenograft mouse model |
PloS one |
Medium |
23300578
|
| 2013 |
Pokemon/ZBTB7A directly binds the miR-21 promoter at GC boxes (-684 to -679 bp and -652 to -647 bp) and upregulates miR-21 transcription, which in turn suppresses Sprouty1 (a miR-21 target); site-directed mutagenesis of GC boxes abolished Pokemon regulation of miR-21. |
ChIP, luciferase reporter assay, site-directed mutagenesis, siRNA |
Journal of cellular biochemistry |
Medium |
23355454
|
| 2014 |
ZBTB7A directly binds to the promoters of key glycolytic genes GLUT3, PFKP, and PKM and transcriptionally represses them; ZBTB7A-deficient tumors exhibit elevated glycolysis and heightened sensitivity to glycolysis inhibition. |
ChIP, luciferase reporter assay, metabolic assays, ZBTB7A loss-of-function (KO/KD) in cell lines and mouse models, TCGA data analysis |
Genes & development |
High |
25184678
|
| 2014 |
FBI-1 (ZBTB7A) interacts with the splicing factor SAM68 and reduces SAM68 binding to BCL-X mRNA, shifting BCL-X alternative splicing toward the anti-apoptotic BCL-XL variant and counteracting SAM68-mediated apoptosis; this splicing role requires HDAC activity. |
Co-immunoprecipitation, RNA immunoprecipitation, RT-PCR splicing assay, FBI-1 knockdown, SAM68 interaction-domain mutant, HDAC inhibitor treatment |
EMBO reports |
High |
24514149
|
| 2014 |
Pokemon/ZBTB7A directly interacts with Smad4, and this interaction is enhanced by TGF-β1 treatment; Pokemon overexpression decreases TGF-β-induced transcriptional activities by recruiting HDAC1 to the Smad4 complex and reducing Smad4–p300/CBP interaction, without affecting Smad2/3 activation or Smad complex formation. |
Co-immunoprecipitation (in vitro and in vivo), luciferase reporter assay, ChIP (Pokemon recruitment to Smad4-DNA complex), Western blot |
Biochimica et biophysica acta |
Medium |
25514493
|
| 2014 |
FBI-1 (ZBTB7A) physically interacts with ETS-1, promotes ETS-1 nuclear accumulation, and enhances ETS-1 recruitment to target gene promoters; this occurs partly by FBI-1 downregulating p53-mediated inhibition of ETS-1. |
Co-immunoprecipitation, ChIP, luciferase reporter assay |
PloS one |
Low |
24857950
|
| 2015 |
ZBTB7A directly binds the MCAM promoter and transcriptionally represses MCAM expression; loss of ZBTB7A leads to upregulation of MCAM and enhanced melanoma cell invasion and metastasis. |
ChIP, promoter reporter assay, loss-of-function (ZBTB7A KD), invasion/metastasis assays, human melanoma specimen analysis |
Molecular cancer research |
Medium |
25995384
|
| 2015 |
Zinc finger domain mutations in ZBTB7A (identified in human cancers) result in loss of DNA-binding function; cells harboring these mutations show marked upregulation of glycolytic target genes (GLUT3, PFKP, PKM), increased glycolysis, and enhanced proliferation. |
Site-directed mutagenesis of zinc finger domain, luciferase reporter assay, metabolic assays, cell proliferation assay, cancer genome database mining |
Oncogene |
High |
26455326
|
| 2016 |
Recurrent ZBTB7A mutations (missense and truncating) affecting the C-terminal zinc-finger domain occur in 23% of AML t(8;21) patients; these mutations disrupt the transcriptional repressor activity and anti-proliferative effect of ZBTB7A, and their specific association with t(8;21) AML indicates leukaemogenic cooperativity with RUNX1/RUNX1T1. |
Sequencing of patient samples, functional luciferase reporter assay (repressor activity), proliferation assay of mutant ZBTB7A-expressing cells |
Nature communications |
High |
27252013
|
| 2017 |
KLF1 directly drives ZBTB7A expression in erythroid cells by binding to the ZBTB7A proximal promoter (confirmed by ChIP); an erythroid-specific regulatory mechanism upregulates a novel ZBTB7A transcript in the erythroid compartment. |
ChIP, promoter analysis, RT-PCR of novel transcript, erythroid cell differentiation system |
Blood advances |
Medium |
29296711
|
| 2017 |
ZBTB7A directly binds the LINC00473 promoter and transcriptionally represses LINC00473 expression in osteosarcoma; LINC00473 interacts with transcription factor C/EBPβ, facilitating its binding to the IL24 promoter to decrease chemoresistance. |
ChIP, luciferase reporter assay, siRNA knockdown, RNA immunoprecipitation |
Neoplasia |
Medium |
28942243
|
| 2017 |
Zbtb7a induction in alveolar macrophages (AMs) is a critical early event in DSA-induced chronic lung allograft rejection; selective disruption of Zbtb7a in AMs reduced bronchiolar occlusion and immune responses to lung-restricted self-antigens; antigen presentation by AMs is Zbtb7a-dependent, as Zbtb7a-deficient AMs failed to induce antibody and T cell responses. |
Conditional macrophage-specific Zbtb7a knockout, murine obliterative airway disease model, adoptive transfer, immunological readouts (antibody and T cell responses) |
Science translational medicine |
High |
28701473
|
| 2018 |
ZBTB7A directly binds the γ-globin gene promoter at the -200 bp region (containing two copies of four consecutive C:G base pairs) and acts as a major direct repressor of fetal HBG1/HBG2 (γ-globin) gene expression; naturally occurring HPFH-associated point mutations at -200 bp disrupt ZBTB7A binding and elevate γ-globin expression. |
CRISPR-Cas9 introduction of HPFH mutations, ChIP, EMSA, erythroid cell reporter assays |
Nature genetics |
High |
29610478
|
| 2018 |
HP1γ (CBX3) directly represses ZBTB7A expression in lung adenocarcinoma cells; knockdown of ZBTB7A significantly restores the proliferation, colony formation, and migration defects caused by HP1γ depletion, placing ZBTB7A downstream of HP1γ in a lung adenocarcinoma-promoting pathway; ZBTB7A in turn downregulates AXL expression. |
siRNA knockdown (HP1γ and ZBTB7A), epistasis rescue experiment, ChIP (HP1γ on ZBTB7A locus), cell proliferation/colony/migration assays, in vivo K-RasG12D mouse model |
Cancer research |
Medium |
29764865
|
| 2018 |
Zbtb7a binds to a significant fraction of genomic promoters and enhancers genome-wide; it is required for inducible changes in chromatin accessibility driven by NF-κB p65 and other transcription factors (TFs); Zbtb7a associates with promoters independently of client TF binding and specifies promoters amenable to TF-induced accessibility changes, acting as an accessibility transducer. |
ChIP-seq, ATAC-seq, RNA-seq, Zbtb7a knockdown, p65 induction experiments in macrophages |
PLoS biology |
High |
29813070
|
| 2019 |
ZBTB7A mediates AR-dependent transcriptional repression in prostate cancer cells; ZBTB7A is recruited to E2F-Rb binding sites by AR and negatively regulates E2F1 transcriptional activity on DNA replication genes; AR recruitment of Rb strengthens the E2F-Rb repression complex; ZBTB7A suppresses castration-resistant prostate cancer growth in vitro and in vivo. |
ChIP-seq, RNA-seq, siRNA knockdown, co-immunoprecipitation, in vitro and xenograft in vivo assays |
Cancer research |
High |
31444154
|
| 2019 |
Under hypoxia, NF-κB (RelA/p65) binds NF-κB-binding elements in the ZBTB7A promoter and represses ZBTB7A expression, thereby de-repressing SLC16A3 (MCT4); FBI-1/ZBTB7A directly represses SLC16A3 by binding both FREs and HREs in the SLC16A3 promoter during normoxia. |
Transient transfection/reporter assay of SLC16A3 and ZBTB7A promoter constructs, oligonucleotide pulldown, ChIP |
Biochimica et biophysica acta. Gene regulatory mechanisms |
Medium |
31271899
|
| 2019 |
ZBTB7A transcriptionally regulates ERα (ESR1) expression in ERα-positive breast cancer by binding the ESR1 promoter (+146 to +461 bp downstream of TSS), and inhibition of ZBTB7A upregulates E3 ligase TRIM25, enhancing ERα ubiquitination and proteasomal degradation; ERα in turn potentiates ZBTB7A expression post-translationally, forming a positive feedback loop. |
ChIP, luciferase reporter assay, siRNA knockdown, TRIM25 co-IP/ubiquitination assay, estrogen-response element reporter |
Journal of molecular cell biology / Life sciences |
Medium |
30265334 31715186
|
| 2019 |
ZBTB7A directly binds the LncRNA GAS5 promoter and transcriptionally suppresses GAS5 expression in osteosarcoma cells, reducing ER stress-induced apoptosis; miR-663a (induced by ER stress) directly targets the 3'UTR of ZBTB7A to downregulate it. |
ChIP, luciferase reporter assay, miRNA 3'UTR reporter assay, siRNA knockdown, in vivo xenograft |
Cancer letters |
Medium |
30753838
|
| 2020 |
BMP4 signaling opens chromatin at Zbtb7a/b loci early during primed-to-naive pluripotency transition (PNT); ZBTB7A in turn occupies and facilitates opening of naive pluripotent chromatin loci (activating nearby genes) while also occupying loci that are silenced, consistent with dual roles in chromatin remodeling during PNT. |
ATAC-seq (chromatin accessibility), ChIP-seq (ZBTB7A binding), RNA-seq, BMP4-driven PNT system, ZBTB7A overexpression/knockdown |
Nature cell biology |
High |
32393886
|
| 2020 |
Wild-type ZBTB7A prevents RUNX1-RUNX1T1 (AML1-ETO)-mediated clonal expansion of human CD34+ hematopoietic stem and progenitor cells; ZBTB7A mutations enable this clonal expansion. ZBTB7A loss increases glycolysis and sensitizes t(8;21) leukemic blasts to 2-deoxy-D-glucose. ZBTB7A expression in t(8;21) cells causes cell cycle arrest recapitulated by glycolysis inhibition. |
Lentiviral expression of WT/mutant ZBTB7A in CD34+ cells, clonal expansion assay, Seahorse metabolic assay, cell cycle analysis, 2-DG treatment |
Oncogene |
High |
32115572
|
| 2021 |
X-ray crystal structures of the ZBTB7A DNA-binding domain (four zinc fingers) in complex with the γ-globin promoter -200 bp element reveal that ZF1 and ZF2 recognize the 5' C:G quadruple and ZF4 contacts the 3' C:G quadruple; HPFH-associated mutations that impair ZBTB7A binding most severely disrupt base pairs recognized by ZF1 and ZF2. |
X-ray crystallography, in vitro DNA-binding assays with HPFH mutant sequences |
Cell reports |
High |
34592153
|
| 2022 |
CRISPR activation screen identified ZBTB7A as a factor that, when upregulated, promotes cell survival and allows HCoV-229E to establish a persistent homeostatic infection rather than causing cell death; control of oxidative stress is a primary driver of cellular survival during HCoV-229E infection downstream of ZBTB7A. |
CRISPR activation screen, viral infection assay (HCoV-229E), cell viability assay, oxidative stress measurement |
Cell reports |
Medium |
36243002
|
| 2023 |
ZBTB7A directly binds the EPB41L5 gene promoter and represses its transcription in glioblastoma cells; ZBTB7A depletion induces GBM progression and metastasis, while ZBTB7A expression dramatically inhibits GBM tumor growth by suppressing EPB41L5-driven EMT. |
RNA-seq (ZBTB7A-depleted vs. control), ChIP (ZBTB7A binding to EPB41L5 promoter), loss-of-function (siRNA/shRNA), in vitro invasion assay, in vivo tumor growth assay |
Experimental & molecular medicine |
Medium |
36596853
|
| 2023 |
ZBTB7A directly binds the promoter regions of HK2 and LDHA, transcriptionally inhibiting their expression; small nucleolar RNA-derived fragment U3-miR reduces ZBTB7A mRNA stability (via ZBTB7A 3'UTR binding), thereby releasing HK2/LDHA repression and enhancing aerobic glycolysis in IDH1-wild-type glioblastoma cells. |
ChIP (ZBTB7A on HK2 and LDHA promoters), luciferase 3'UTR reporter assay, Seahorse glycolysis assay, siRNA knockdown |
CNS neuroscience & therapeutics |
Medium |
37066523
|