| 1998 |
BACH2 was identified as a B-cell-specific transcription factor that forms heterodimers with small Maf proteins (e.g., MafK) and binds to Maf recognition elements (MAREs) in the IgH 3' enhancer, acting as a negative regulator. BACH2 also binds the co-repressor SMRT. |
Co-immunoprecipitation, EMSA, B-cell extract binding assays, reporter assays |
The EMBO journal |
High |
9755173
|
| 2000 |
BACH2 is regulated by oxidative stress-sensitive conditional nuclear export via a C-terminal cytoplasmic localization signal (CLS) that directs leptomycin B-sensitive (CRM1/exportin-1-dependent) nuclear export. Oxidative stressors abrogate this CLS activity, causing nuclear accumulation of BACH2 and repression of MARE-dependent transcription. |
Mutagenesis, leptomycin B treatment, fluorescence microscopy, reporter assays |
The Journal of biological chemistry |
High |
10809773
|
| 2002 |
Upon oxidative stress, BACH2 forms nuclear foci associated with PML nuclear bodies and promotes apoptosis. BACH2 acts as a generic repressor of TRE-, MARE-, and ARE-driven transcription, and its nuclear accumulation upon oxidative stress is required but not sufficient for apoptosis induction. |
Retroviral bicistronic reporter, fluorescence microscopy, apoptosis assays, immunofluorescence co-localization with PML bodies |
The Journal of biological chemistry |
High |
11923289
|
| 2004 |
BACH2 is required for class switch recombination (CSR) and somatic hypermutation (SHM) of immunoglobulin genes in activated B cells. Genetic ablation of Bach2 in mice shows it is not required for plasma cell differentiation per se but is essential for the CSR process. |
Bach2 knockout mice, in vitro B-cell stimulation, immunoglobulin analysis |
Nature |
High |
15152264
|
| 2004 |
Upon oxidative stress, BACH2 is sumoylated, which is required for its recruitment around PML nuclear bodies. BACH2 selectively represses transcription associated with PML bodies; FRAP experiments revealed rapid turnover of BACH2 in nuclear foci, and the BTB domain is essential for focus formation. |
Fluorescence recovery after photobleaching (FRAP), mutagenesis, sumoylation assays, reporter gene assays |
Molecular and cellular biology |
High |
15060166
|
| 2006 |
BACH2 directly represses expression of Blimp-1 (encoded by Prdm1) in B cells by binding as a heterodimer with MafK to the MARE upstream of the Prdm1 promoter and in intron 5. Loss of BACH2 leads to more rapid and robust Blimp-1 induction and plasma cell differentiation. |
EMSA, ChIP, reporter assays, shRNA knockdown, primary Bach2-deficient B cells |
The Journal of biological chemistry |
High |
17046816
|
| 2006 |
BCR/ABL signaling phosphorylates BACH2 at S521 via the PI3K/S6 kinase pathway, which promotes cytoplasmic retention of BACH2 and prevents nuclear accumulation. Mutation of S521 to alanine leads to nuclear accumulation and greater growth inhibition of CML cells. |
Mutagenesis, phosphorylation assays, subcellular fractionation, cell growth assays |
Blood |
High |
17018862
|
| 2007 |
SMRT co-repressor mediates HDAC4 binding to BACH2; HDAC4 facilitates retention of BACH2 in nuclear foci. Co-expression of SMRT and HDAC4 enhances BACH2 nuclear focus formation and local transcriptional repression at MARE-containing reporter genes. |
Co-immunoprecipitation, confocal microscopy, scratch transcription labeling, reporter assays |
Journal of biochemistry |
Medium |
17383980
|
| 2008 |
BACH2 interacts with BCL6 in B cells in a BTB-domain-independent manner. Both BACH2 and BCL6 bind to separate regulatory elements (MARE and BCL6-binding element, respectively) of the Prdm1 gene and cooperate to repress its expression; co-expression results in greater repression. |
Co-immunoprecipitation, ChIP, reporter assays |
International immunology |
Medium |
18256039
|
| 2010 |
BACH2 represses Blimp-1 in B cells to create a time delay in plasma cell differentiation, allowing a window for class switch recombination. Genetic loss of Blimp-1 in Bach2-/- B cells restores CSR, establishing that Bach2 acts upstream of Blimp-1 in the B-cell gene regulatory network. |
Double-knockout mouse genetics, mathematical modeling of GRN, in vitro B-cell stimulation assays |
The EMBO journal |
High |
20953163
|
| 2011 |
Heme binds to BACH2 and inhibits its DNA-binding activity in vitro; heme also reduces BACH2 half-life in B cells. Heme treatment of B cells enhances Blimp-1 transcription and skews plasma cell differentiation toward IgM. Heme oxygenase-1 is repressed by both BACH2 and BACH1 in B cells. |
In vitro DNA-binding assay, pulse-chase protein stability assay, B-cell culture with heme treatment, reporter assays |
Blood |
High |
21444915
|
| 2011 |
Crystal structure of the human BACH2 POZ/BTB domain dimer was solved at 2.1 Å resolution. The structure reveals an intersubunit disulfide bond present both in bacterially expressed protein and in eukaryotic cells. The BTB domain mediates dimerization and recruits co-repressors including class II HDACs. |
X-ray crystallography, biochemical validation in solution and in transfected eukaryotic cells |
Acta crystallographica. Section D, Biological crystallography |
High |
22194330
|
| 2013 |
BACH2 broadly represses effector CD4+ T-cell differentiation programs (Th1, Th2, Th17) while being required for efficient Foxp3+ Treg cell formation. In Bach2-deficient mice, Treg polarization results in inappropriate diversion to effector lineages, and lethal inflammation is suppressed in a Treg-dependent manner. Genome-wide BACH2 occupancy showed enrichment at enhancers of effector differentiation genes. |
Bach2 knockout mice, ChIP-seq, genome-wide expression profiling, Treg transfer experiments |
Nature |
High |
23728300
|
| 2013 |
BACH2 activates p53 to mediate negative selection of pre-B cells that fail productive VH-DJH rearrangement. Pre-BCR signaling ends BACH2-mediated negative selection via BCL6-mediated repression of p53. BACH2 competes with BCL6 for promoter binding and reverses BCL6-mediated repression of p53 and cell cycle checkpoint genes. |
ChIP-seq, gene expression analysis, Bach2 knockout pre-B cells, leukemia transplant experiments |
Nature medicine |
High |
23852341
|
| 2013 |
BACH2 maintains naive T cells by suppressing effector-memory-related genes including CCR4, ST-2, and Blimp-1. ChIP-seq identified direct BACH2 target genes (S100 calcium binding protein a, Heme oxygenase-1, prolyl hydroxylase 3). Forced expression of BACH2 restored expression of these genes. |
ChIP-seq, Bach2-deficient mouse T-cell analysis, forced expression experiments |
Proceedings of the National Academy of Sciences of the United States of America |
High |
23754397
|
| 2013 |
Antigen-experienced IgG1 memory B cells have repressed Bach2 expression compared to non-experienced IgG1 B cells, and this Bach2 repression contributes to predisposition toward plasma cell differentiation upon rechallenge. |
Engineered mice with non-experienced IgG1 B cells, gene expression analysis, in vivo rechallenge experiments |
Immunity |
Medium |
23850379
|
| 2013 |
Bach2 cooperates with BCL6 in germinal center B cells to repress the plasma cell program. BCL6 and BACH2 bind overlapping sets of target genes (~30% peak overlap), including PRDM1 cis-regulatory sequences. BACH2 binds predominantly with heterodimer partner MAFK. BCL6 also modulates BACH2 protein stability, and their levels are positively correlated in GC B cells. |
ChIP-seq, double-heterozygous knockout mice, protein stability assays, B-cell gene expression profiling |
Blood |
High |
24277074
|
| 2013 |
BACH2 promotes Foxp3 expression in a TCR/TGF-β-induced Treg differentiation assay and represses the competing Gata3-driven Th2 effector program. Bach2-deficient Treg cells show reduced Bcl-2 and Mcl-1 levels and elevated Bim/Bcl-2 ratio, contributing to reduced survival. |
Bach2 KO mouse, in vitro Treg induction assay, flow cytometry, gene expression analysis |
Journal of immunology (Baltimore, Md. : 1950) |
Medium |
24367030
|
| 2014 |
BACH2 represses myeloid genes in B-cell progenitors (common lymphoid progenitors) to promote B-cell lineage commitment. Bach2 and Bach1 bind presumptive regulatory regions of myeloid genes. Bach2-high CLPs are resistant to myeloid differentiation even under myeloid culture conditions. |
Bach2/Bach1 KO mice, single-cell analysis of CLPs, ChIP, overexpression in pre-pro-B cells lacking EBF1 |
Nature immunology |
High |
25344725
|
| 2014 |
Menin binds to the Bach2 locus and controls its expression through maintenance of histone acetylation. T cell-specific Menin deficiency results in decreased Bach2 expression and premature CD4+ T cell senescence; this Menin-Bach2 axis regulates cytokine homeostasis. |
T cell-specific Menin conditional KO mice, ChIP at Bach2 locus, histone acetylation analysis |
Nature communications |
High |
24694524
|
| 2014 |
Heme binds to an intrinsically disordered region (residues 331–520) of BACH2 containing Cys-Pro motifs. Heme binding is in 5- and 6-coordinated modes, induces conformational changes (revealed by CD, SAXS, DLS), and alters protein interactions mediated by this region. The CP-motif mutant lacks 5-coordinated heme binding. |
Spectroscopic analysis (UV-Vis, CD), dynamic light scattering, small-angle X-ray scattering, chemical modification, GAL4-based luciferase assay |
Archives of biochemistry and biophysics |
High |
25444856
|
| 2015 |
Bach2 is phosphorylated at multiple sites in B cells via the PI3K-Akt-mTOR pathway. The mTOR complex 1 (mTORC1) phosphorylates Bach2 in vitro. A single phosphorylation site, Ser-535 (murine), is critical: the Ser-535 mutation abolishes cytoplasmic accumulation and promotes nuclear localization, enhancing Bach2 repressor activity. |
Mass spectrometry phosphosite identification, kinase inhibitors, mTORC1 in vitro phosphorylation assay, site-directed mutagenesis |
The Journal of biological chemistry |
High |
26620562
|
| 2016 |
BACH2 is recruited to enhancers in naive CD8+ T cells, where it limits expression of TCR-driven effector genes by attenuating AP-1 site availability to Jun family signal-dependent transcription factors. Upon effector differentiation, reduced BACH2 expression and its phosphorylation enable unrestrained TCR-driven effector programs. |
ChIP-seq, ATAC-seq, BACH2 KO mouse, viral infection models |
Nature immunology |
High |
27158840
|
| 2016 |
Bach2 associates with Batf and together the Bach2-Batf complex binds to regulatory regions of Th2 cytokine gene loci. This complex antagonizes the Batf-Irf4 complex at AP-1 motifs, suppressing Th2 cytokine production. Bach2 also regulates Batf/Batf3 expression by inhibiting IL-4 production and directly repressing Batf/Batf3 gene loci. |
Co-immunoprecipitation, ChIP-seq, Bach2 KO mouse, cytokine measurement assays |
Nature communications |
High |
27581382
|
| 2016 |
BACH2 haploinsufficiency causes a syndrome of immunodeficiency and autoimmunity (BRIDA). BACH2 mutations disrupt protein stability by interfering with homodimerization or causing aggregation. BACH2 is associated with a super-enhancer architecture, and SE-associated gene haploinsufficiency is enriched among Mendelian immunodeficiency diseases. |
Human genetics, patient cell studies, protein stability assays, homodimerization assays, SE chromatin analysis |
Nature immunology |
High |
28530713
|
| 2016 |
BACH2 promotes tumor immunosuppression through Treg-mediated inhibition of intratumoral CD8+ T cells and IFN-γ. In Bach2-deficient mice, tumor growth is markedly impaired, with high frequencies of rapidly proliferating effector T cells and reduced intratumoral Foxp3+ Tregs. |
Bach2 KO mouse tumor implantation models, adoptive transfer experiments, intratumoral lymphocyte analysis |
The Journal of clinical investigation |
High |
26731475
|
| 2016 |
The epigenetic regulation of Prdm1 in B cells involves BACH2 interacting with HDAC3-containing co-repressor complexes (including NCoR1, NCoR2, Tbl1x, and Rif1) to write histone deacetylation marks at the Prdm1 intron 5 MARE. ChIP confirmed binding of HDAC3 and Rif1 to the Prdm1 locus; knockdown of HDAC3 or NCoR1 increased Prdm1 expression. |
Purification of Bach2 complex by mass spectrometry, ChIP, RNA interference knockdown |
The Journal of biological chemistry |
High |
26786103
|
| 2017 |
mTOR complex 1 (mTORC1) inhibits nuclear accumulation and stability of Bach2, while mTOR complex 2 (mTORC2) inhibits FoxO1 to reduce Bach2 mRNA expression. Bach2 directly regulates Ccnd3 (cyclin D3) expression. The mTOR-Bach2 cascade controls proper cell cycle arrest in B cells, and mTOR inhibition enhances CSR in a Bach2-dependent manner. |
mTOR inhibitor treatment, Bach2 KO mice, ChIP, expression profiling, cell cycle analysis |
Molecular and cellular biology |
High |
28993481
|
| 2017 |
Bach2 and C/EBPβ form a mutual repression gene regulatory network in multipotent hematopoietic progenitors. Bach2 represses Cebpb and Csf1r; C/EBPβ represses Bach2 and activates Csf1r. Both factors bind overlapping regulatory regions at myeloid target genes. LPS reduces Bach2 expression, enhancing myeloid differentiation. |
ChIP, gene expression profiling, KO mouse models, LPS stimulation experiments |
Cell reports |
High |
28273455
|
| 2017 |
IL-2 drives BACH2 repression via ERK/ELK1 signaling to direct plasma cell lineage commitment in human naive B cells. Enforced BACH2 repression unlocks the plasma cell transcriptional program. An active regulatory region within the BACH2 super-enhancer is under ELK1 control. |
RNA-seq, ChIP-seq, ERK/ELK1 inhibitors, B-cell differentiation assays |
Nature communications |
High |
29129929
|
| 2018 |
SENP3-mediated deSUMOylation of BACH2 prevents its nuclear export, thereby repressing effector T-cell differentiation genes and stabilizing Treg cell-specific gene signatures. Treg-specific deletion of Senp3 results in T-cell activation and autoimmune symptoms. ROS accumulation promotes SENP3 accumulation in Treg cells involved in tumor immunosuppression. |
Treg-specific Senp3 conditional KO mice, SUMOylation assays, subcellular fractionation, ChIP, tumor immunosuppression models |
Nature communications |
High |
30089837
|
| 2018 |
Bach2 and Bach1 promote erythroid commitment by repressing the myeloid transcription factor gene Cebpb and its targets at the erythro-myeloid bifurcation step. Bach TFs bind to regulatory regions co-occupied by C/EBPβ. Knockdown of BACH1 or BACH2 in human CD34+ HSPCs impairs erythroid differentiation in vitro. |
ChIP, Bach2/Bach1 KO and overexpression in HSPCs, human CD34+ siRNA knockdown, erythroid differentiation assays |
Nature immunology |
High |
30250186
|
| 2019 |
Bach2 directly suppresses Bcl-6 transcription in Tfh cells by binding to the Bcl-6 promoter and replacing an activating Batf-Irf4 complex, thereby controlling the Tfh cell transcriptional network. This is mechanistically distinct from GC B cells, where Bach2 and Bcl-6 are co-expressed. |
Ectopic overexpression in murine Tfh cells, reporter assays, ChIP at Bcl-6 promoter |
Journal of immunology (Baltimore, Md. : 1950) |
Medium |
30833348
|
| 2019 |
Bach2 directly suppresses CXCR5 and c-Maf expression in CD4+ T cells by binding to a regulatory element in the CXCR5 locus. Bach2 deficiency results in preferential Tfh cell differentiation but ultimately collapsed CD4+ T cell memory. |
Bach2 KO mouse, identification of novel CXCR5 regulatory element by reporter assay, in vivo viral infection models |
Journal of immunology (Baltimore, Md. : 1950) |
Medium |
30971440
|
| 2020 |
BACH2 in resting Treg cells binds to enhancers of genes involved in activated Treg differentiation and represses their TCR-driven induction by competing with AP-1 factors for DNA binding, thereby maintaining Treg quiescence. |
Bach2 conditional KO in Tregs, ChIP-seq, ATAC-seq, tumor immunosuppression models |
The Journal of experimental medicine |
High |
32515782
|
| 2020 |
BACH2 counteracts the DNA-binding activity of IRF4 and limits chromatin accessibility, thereby attenuating IRF4-dependent transcription in Treg cells. Loss of Bach2 normalizes eTreg differentiation of IRF4-deficient Tregs, establishing genetic epistasis between BACH2 and IRF4. |
Bach2/IRF4 double conditional KO epistasis experiments, ATAC-seq, ChIP-seq |
Nature communications |
High |
31937752
|
| 2021 |
BACH2 establishes the transcriptional and epigenetic programs of stem-like CD8+ T cells during chronic infection; BACH2 overexpression enforces stem-like cell fate while BACH2 deficiency impairs stem-like CD8+ T cell differentiation. BACH2 suppresses the terminal exhaustion program through transcriptional repression and epigenetic silencing. |
BACH2 KO, overexpression, single-cell transcriptomics, single-cell epigenomics (scATAC-seq), chronic viral infection models |
Nature immunology |
High |
33574619
|
| 2021 |
BACH2 directly represses CD25 (IL-2Rα) transcription in Treg cells, thereby attenuating IL-2R signaling. Upregulated CD25/IL-2R signaling in Bach2-deficient resting Tregs partially counteracts poor survival. Bach2 also suppresses CD25/IL-2R signaling in T follicular regulatory cells to enable their full differentiation. |
Bach2 conditional KO in Tregs, ChIP at CD25 locus, flow cytometry, in vivo Tfr analysis |
Cell reports |
High |
33979619
|
| 2021 |
BACH2 knockdown in T2D pancreatic islets reverses cellular features of the disease, restoring a non-diabetic phenotype. BACH2 is identified as a master regulator of T2D islet cell states via single-cell gain- and loss-of-function analyses and glucose-induced Ca2+ flux assays. |
Single-cell gain/loss-of-function, Ca2+ flux assays, BACH2 KO in T2D islets, BACH inhibitor treatment in diabetic mice and human islets |
The Journal of clinical investigation |
Medium |
34907913
|
| 2022 |
BACH2 acts as an intrinsic negative regulator of NK cell maturation and function by restricting maturation in the presence of weak stimulatory signals. BACH2 expression positively correlates with TCF1 and negatively correlates with NK effector molecules; lack of BACH2 causes changes in chromatin accessibility and accumulation of activated, terminally differentiated NK cells with augmented anti-tumor cytotoxicity. |
Bach2 conditional KO in NK cells, ATAC-seq, flow cytometry, tumor metastasis models |
The Journal of experimental medicine |
High |
36178457
|
| 2014 |
BACH2 regulates apoptosis in pancreatic β-cells via JNK1 modulation: BACH2 inhibition exacerbates cytokine-induced β-cell apoptosis via the mitochondrial pathway by upregulating MKK7 and downregulating PTPN2, leading to increased JNK1 and BIM phosphorylation. |
BACH2 siRNA knockdown and overexpression in human and rodent β-cells, kinase activity assays, apoptosis assays |
Diabetes |
Medium |
24608439
|
| 2017 |
Bach2 directly represses the AP-1-driven induction of the interleukin-2 gene in CD4+ T cells by binding to multiple MARE-like sites on the IL-2 proximal promoter in a manner competitive with AP-1 factors. |
Luciferase reporter assay, ChIP, BACH2 overexpression and knockdown in primary and transformed CD4+ T cells |
BMB reports |
Medium |
28855027
|
| 2018 |
Bach2 promotes BCR-induced B-cell proliferation and survival by repressing cyclin-dependent kinase inhibitors (Cdkn1a, Cdkn2a, Cdkn2b) and maintaining expression of anti-apoptotic Bcl-xL. ChIP showed direct binding of Bach2 to CKI family gene loci. |
Bach2 KO mice, BrdU incorporation, ChIP, transcriptome analysis, Bcl-xL reconstitution |
Journal of immunology (Baltimore, Md. : 1950) |
High |
29540581
|
| 2024 |
The relative strength of BLIMP1 versus BACH2 progressively increases in favor of BLIMP1 in antigen-responding B cells through primary responses, with epigenetic imprinting driven by IRF4 determining MBC fate upon recall. Skewing the BLIMP1-BACH2 balance in fate-predisposed MBC subsets can switch their fate preferences. |
Single-cell epigenomics, ATAC-seq, genetic manipulation of BLIMP1-BACH2 balance in MBC subsets, history-stamped GC B cell analysis |
Nature immunology |
High |
38969872
|
| 2024 |
BACH2 promotes immunomodulatory non-pathogenic TH17 programs and restrains proinflammatory TH1-like programs in TH17 cells. BACH2 establishes distinct chromatin landscapes in npTH17 versus pTH17 cells in vitro and in vivo, sharing accessible chromatin configurations with Treg cells in npTH17 cells. |
scATAC-seq, scRNA-seq, Bach2 KO in TH17 cells, in vitro and in vivo inflammatory disease models |
Nature immunology |
High |
39009838
|