| 2023 |
Cryo-EM structure of the complete human SIN3B histone deacetylase holo-complex (with and without substrate mimic) reveals that SIN3B encircles HDAC1/2 and contacts its allosteric basic patch to stimulate catalysis; a SIN3B loop inserts into the catalytic tunnel, rearranges to accommodate the acetyl-lysine moiety, and stabilizes the substrate for deacetylation guided by a substrate receptor subunit. |
Cryo-EM structure determination, in vitro deacetylase assays, substrate mimic binding |
Nature communications |
High |
37137925
|
| 2000 |
NMR solution structure of SIN3B PAH2 domain in complex with a Mad1 N-terminal peptide defines a 'wedged helical bundle' interaction fold: four PAH2 alpha-helices form a hydrophobic cleft that accommodates an amphipathic Mad1 alpha-helix, and Mad1 binding stabilizes secondary structure elements of PAH2. |
NMR solution structure determination |
Nature structural biology |
High |
11101889
|
| 2010 |
SIN3B forms a mammalian complex with HDAC1, Mrg15, and PHD-finger protein Pf1; this complex localizes ~1 kb downstream of transcription start sites of transcribed genes, requires Pf1 and Mrg15 for chromatin association, and its inactivation promotes increased RNA polymerase II progression and transcription within transcribed regions. |
Co-immunoprecipitation, ChIP, siRNA knockdown, RNAP II progression assays |
Molecular and cellular biology |
High |
21041482
|
| 2010 |
RNF220, a RING finger E3 ubiquitin ligase, directly binds SIN3B (identified by yeast two-hybrid and confirmed by co-immunoprecipitation) and promotes its ubiquitination and proteasomal degradation, thereby regulating Sin3/HDAC complex levels. |
Yeast two-hybrid, co-immunoprecipitation, ubiquitination assay, proteasome inhibitor rescue |
Biochemical and biophysical research communications |
Medium |
20170641
|
| 2000 |
MNF-beta (myocyte nuclear factor beta), a winged-helix/forkhead protein, forms a co-repressor complex with mammalian SIN3B; MNF-beta mutants unable to bind mSin3 are defective in transcriptional repression and negative growth regulation. |
Co-immunoprecipitation, transcriptional repression assay, oncogenic transformation assay with binding-defective mutants |
The Biochemical journal |
Medium |
10620510
|
| 2011 |
Human SIN3B directly interacts with p53 (amino acids 1-399 of SIN3B bind the N-terminal region, aa 1-108, of p53); genotoxic stress (Adriamycin) increases SIN3B levels and recruits the SIN3B/HDAC1 complex to promoters of p53 target genes (HSPA8, MAD1, CRYZ) in a p53-dependent manner, resulting in their repression and increased H3K9 tri-methylation. |
Co-immunoprecipitation with deletion mapping, ChIP, shRNA knockdown, p53+/+ vs p53-/- cell comparison |
PloS one |
Medium |
22028823
|
| 2018 |
SIN3B associates with the DREAM complex (identified by unbiased proteomics); genetic inactivation of Sin3B de-represses DREAM target genes during quiescence but is insufficient alone to allow quiescent cells to re-enter the cell cycle; however, inactivation of APC/C-CDH1 was sufficient to drive Sin3B-/- cells back into the cell cycle, revealing functional cooperation between SIN3B-mediated E2F target repression and APC/C-CDH1 in negative regulation of cell cycle progression. |
Proteomics/mass spectrometry, genetic inactivation (Sin3B-/-), RNA-seq, genetic epistasis (APC/C-CDH1 inactivation in Sin3B-/- background) |
Cell reports |
High |
30517867
|
| 2009 |
SIN3B is required for replicative and oncogene-induced senescence in fibroblasts; Sin3B-inactivated fibroblasts fail to undergo senescence and overexpression of Sin3B triggers senescence and formation of senescence-associated heterochromatic foci. |
Genetic inactivation (Sin3B-/- mouse-derived fibroblasts), overexpression, senescence assays, heterochromatic foci imaging |
Cancer research |
High |
19654306
|
| 2014 |
SIN3B is required for KRAS-induced senescence in vivo in pancreatic cells; Sin3B inactivation impairs IL-1α production associated with oncogene-induced senescence, indicating SIN3B links senescence to inflammatory signaling (SASP) that promotes pancreatic cancer progression. |
Genetic inactivation in mouse PDAC model, IL-1α measurement, correlation with human tissue samples |
The Journal of clinical investigation |
High |
24691445
|
| 2014 |
SIN3B directly interacts with MYC protein in a Max-independent manner; HDAC1 is recruited to Myc-Sin3B complexes; Sin3B overexpression induces Myc deacetylation and degradation, while Sin3B silencing leads to Myc upregulation. |
Yeast two-hybrid, co-immunoprecipitation, immunofluorescence, proximity ligation assay, HDAC inhibitor treatment, Sin3B knockdown/overexpression |
The Journal of biological chemistry |
Medium |
24951594
|
| 2014 |
Bmi-1 directly represses the Sin3B locus to prevent senescence; oncogenic stress causes dissociation of Bmi-1 from the Sin3B locus, de-repressing Sin3B expression; Sin3B is required for the senescent phenotype and elevated reactive oxygen species upon Bmi-1 depletion. |
ChIP (Bmi-1 occupancy at Sin3B locus), Bmi-1 depletion, genetic epistasis (Sin3B requirement downstream of Bmi-1 loss) |
Oncogene |
Medium |
25263442
|
| 2014 |
SIN3B is recruited by RFX5 to the COL1A2 transcription start site in response to IFN-γ; SIN3B cooperates with G9a histone methyltransferase to establish a repressive chromatin structure; recruitment involves HDAC2-mediated deacetylation of RFX5; SIN3B knockdown abrogates IFN-γ-induced collagen repression. |
ChIP, shRNA knockdown, co-immunoprecipitation, histone modification assays |
Biochemical and biophysical research communications |
Medium |
24709079
|
| 2008 |
hSIN3B interacts with ETO and MTG16 (but not MTGR1) ETO homologues; the interaction requires an intact ETO amino-terminus and NHR2 domain; hSIN3B and ETO homologues co-localize in the nucleolus of leukemia cells. |
Co-immunoprecipitation (ectopic and endogenous), immunolocalization, protein domain deletion analysis |
BMC molecular biology |
Medium |
18205948
|
| 2013 |
SIN3B directly binds voltage-gated sodium (Nav) channels; the N-terminal region of SIN3B (containing PAH1/PAH2 domains) mediates binding to a 132-residue portion of the Nav channel cytoplasmic C-terminus; expression of the short Sin3B variant reduces native sodium current and Nav channel gating charge without affecting voltage-dependence of activation, suggesting Sin3B influences Nav channel trafficking or membrane stability. |
Yeast two-hybrid, pulldown, co-immunoprecipitation, immunofluorescence colocalization, electrophysiology |
Scientific reports |
Medium |
24077057
|
| 2016 |
BMP4 induces a shift in SIN3B splicing toward the long isoform (which recruits HDACs); RBM39 knockdown prevents this isoform shift and enhances BMP4-dependent transcription; knockdown of long-isoform SIN3B enhances BMP4-dependent transcription whereas knockdown of the short isoform (lacking HDAC recruitment capacity) does not. |
siRNA knockdown, luciferase reporter assay, RNA-seq isoform analysis, isoform-specific knockdown |
Scientific reports |
Medium |
27324164
|
| 2021 |
SIN3B haploinsufficiency in humans causes hyperacetylation of a subset of enhancers and promoters (shown by H3K27ac ChIP-seq in patient PBMCs); zebrafish sin3b disruption causes craniofacial patterning defects, commissural axon defects, and reduced body length, establishing an essential role for Sin3B in chromatin-based transcriptional repression in neurodevelopment. |
H3K27ac ChIP-seq in patient cells, CRISPR-Cas9 zebrafish knockout, morpholino knockdown |
American journal of human genetics |
High |
33811806
|
| 2023 |
SIN3B is rapidly recruited to DNA double-strand break sites and directs the accumulation of MDC1; SIN3B inactivation delays DSB resolution, sensitizes cancer cells to cisplatin and doxorubicin, and shifts DNA repair pathway choice from canonical NHEJ toward alternative NHEJ. |
Genetic inactivation (SIN3B-/-), DNA damage foci analysis, co-immunoprecipitation/localization of MDC1, NHEJ pathway reporter assays, drug sensitivity assays |
Molecular cancer research : MCR |
Medium |
37314748
|
| 2016 |
SIN3B knockdown in breast cancer cells significantly decreases Matrigel invasion and invasive colony formation in 3D matrix, and reduces experimental lung metastases in vivo, while SIN3A knockdown has the opposite effect; RNA-seq identified unique target gene sets for each paralog. |
Stable shRNA knockdown (three non-overlapping shRNA), transwell invasion assay, 3D colony assay, in vivo experimental metastasis, RNA-seq |
Oncotarget |
Medium |
27780928
|
| 2024 |
Sin3B loss in PDAC tumor cells amplifies CXCL9/10 secretion in response to IFN-γ, creates a CXCL9/10-CXCR3 positive feedback loop increasing CD8+ T cell infiltration and cytotoxicity, and correlates with enhanced H3K27Ac distribution on immune response genes; Sin3B loss also enhances sensitivity to anti-PD1 treatment in murine PDAC models. |
Murine PDAC genetic inactivation, cytokine measurements, H3K27Ac ChIP-seq, immune cell infiltration analysis, anti-PD1 treatment in vivo |
Advanced science |
Medium |
39316363
|
| 2019 |
SIN3B promotes integrin αV gene transcription in hepatocellular carcinoma in the presence of sulfatide: sulfatide binds SIN3B (confirmed by mass spectrometry and fat blot), induces a conformational change in the PAH2 domain (from α-helices to β-sheet), causing SIN3B to lose binding affinity for MAD1 and HDAC2, reducing HDAC2 recruitment to the integrin αV promoter and preventing histone H3 deacetylation. |
Mass spectrometry, fat blot, molecular modeling, co-immunoprecipitation, ChIP, promoter reporter assay, migration assay |
Journal of molecular cell biology |
Low |
30215728
|
| 2025 |
Comparison of SIN3B/HDAC2 and MTA1/HDAC1 structures confirms differential modes of HDAC recruitment: HDAC1 Y48 interacts with ELM2/SANT domain-containing proteins (NuRD, CoREST, MIDAC) but not SIN3; a Y48E mutation in HDAC1 disrupts all complexes except SIN3, demonstrating that SIN3B recruits HDAC1/2 through a distinct surface from other co-repressor complexes. |
HDAC1 surface mutation (Y48E, E63R), co-immunoprecipitation/mass spectrometry, structural comparison, rescue experiments in HDAC1/2 double-KO cells |
bioRxivpreprint |
Medium |
bio_10.1101_2025.02.24.639909
|