2. Signaling Pathways
  3. Cell Cycle/DNA Damage
    Epigenetics
  4. HDAC

HDAC

Histone deacetylases

HDAC

Related Products

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HDAC (Histone deacetylases) are a class of enzymes that remove acetyl groups (O=C-CH3) from an ε-N-acetyl lysine amino acid on ahistone, allowing the histones to wrap the DNA more tightly. This is important because DNA is wrapped around histones, and DNA expression is regulated by acetylation and de-acetylation. Its action is opposite to that of histone acetyltransferase. HDAC proteins are now also called lysine deacetylases (KDAC), to describe their function rather than their target, which also includes non-histone proteins. Together with the acetylpolyamine amidohydrolases and the acetoin utilization proteins, the histone deacetylases form an ancient protein superfamily known as the histone deacetylase superfamily.

HDAC Isoform Specific Products:

HDAC Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-A0281S
    4-Phenylbutyric acid-d11
    		Inhibitor 99.30%
    4-Phenylbutyric acid-d11 is the deuterium labeled 4-Phenylbutyric acid. 4-Phenylbutyric acid (4-PBA) is an inhibitor of HDAC and endoplasmic reticulum (ER) stress, used in cancer and infection research.
    4-Phenylbutyric acid-d<sub>11</sub>
  • HY-10585S1
    Valproic acid-d6
    		Inhibitor 99.83%
    Valproic acid-d6 is the deuterium labeled Valproic acid. Valproic acid (VPA; 2-Propylpentanoic Acid) is an HDAC inhibitor, with IC50 in the range of 0.5 and 2 mM, also inhibits HDAC1 (IC50, 400 μM), and induces proteasomal degradation of HDAC2. Valproic acid activates Notch1 signaling and inhibits proliferation in small cell lung cancer (SCLC) cells. Valproic acid sodium salt is used in the treatment of epilepsy, bipolar disorder and prevention of migraine headaches.
    Valproic acid-d<sub>6</sub>
  • HY-107549
    KD 5170
    		Inhibitor 98.13%
    KD 5170 is a pan inhibitor of histone deacetylases (HDACs) and exhibits broad spectrum antitumor activity in vitro and in vivo.
    KD 5170
  • HY-143411
    GEM144
    		Inhibitor
    GEM144 is a potent and orally active DNA polymerase α (POLA1) and HDAC 11 dual inhibitor. GEM144 induces acetylation of p53, activation of p21, G1/S cell cycle arrest, and apoptosis. GEM144 has significant antitumor activity in human orthotopic malignant pleural mesothelioma xenografts.
    GEM144
  • HY-170495
    HDAC6 degrader-5
    		Inhibitor 99.55%
    HDAC6 degrader-5 (Compound 6) exhibits inhibitory and degradation activity against HDAC6, with an IC50 of 4.95 nM and a DC50 of 0.96 nM. HDAC6 degrader-5 inhibits the release of TNF-α, IL-1β and IL-6, blocks the hepatocyte apoptosis. HDAC6 degrader-5 exhibits anti-inflammatory activity in mouse APAP (HY-66005)-induced liver injury models.
    HDAC6 degrader-5
  • HY-18700
    BRD73954
    		Inhibitor 99.13%
    BRD73954 is a potent HDAC inhibitor and selectively inhibiting both HDAC6 and HDAC8 with IC50 values of 0.0036, 0.12, 9, 12, 23 µM for HDAC6, HDAC8, HDAC2, HDAC1 and HDAC3, respectively. BRD73954 decreases the levels of HDAC6, associated with upregulation of Ac-Tubulin.
    BRD73954
  • HY-16012
    Domatinostat tosylate
    		Inhibitor 99.66%
    Domatinostat tosylate (4SC-202) is a selective class I HDAC inhibitor with IC50 of 1.20 μM, 1.12 μM, and 0.57 μM for HDAC1, HDAC2, and HDAC3, respectively. It also displays inhibitory activity against Lysine specific demethylase 1 (LSD1).
    Domatinostat tosylate
  • HY-145426
    MPT0B390
    		Inhibitor 98.76%
    MPT0B390 is an arylsulfonamide-based derivative with potent HDAC inhibitory ability. MPT0B390, TIMP3 inducer, inhibits tumor growth, metastasis and angiogenesis. MPT0B390 shows antiproliferative activity against human colon cancer cell line HCT116 with the GI50 of 0.03 μM.
    MPT0B390
  • HY-10585S
    Valproic acid-d4
    		Inhibitor 98.0%
    Valproic acid-d4 is the deuterium labeled Valproic acid. Valproic acid (VPA; 2-Propylpentanoic Acid) is an HDAC inhibitor, with IC50 in the range of 0.5 and 2 mM, also inhibits HDAC1 (IC50, 400 μM), and induces proteasomal degradation of HDAC2. Valproic acid activates Notch1 signaling and inhibits proliferation in small cell lung cancer (SCLC) cells. Valproic acid sodium salt is used in the treatment of epilepsy, bipolar disorder and prevention of migraine headaches.
    Valproic acid-d<sub>4</sub>
  • HY-110280
    MC1742
    		Inhibitor 98.95%
    MC1742 is a potent HDAC inhibitor, with IC50s of 0.1 μM, 0.11 μM, 0.02 μM, 0.007 μM, 0.61 μM, 0.04 μM and 0.1 μM for HDAC1, HDAC2, HDAC3, HDAC6, HDAC8, HDAC10 and HDAC11, respectively. MC1742 can increase acetyl-H3 and acetyl-tubulin levels and inhibits cancer stem cells growth. MC1742 can induce growth arrest, apoptosis, and differentiation in sarcoma CSC.
    MC1742
  • HY-162616
    SelSA
    		Inhibitor 99.83%
    SelSA is a selective, orally active inhibitor for histone deacetylase 6 (HDAC6) with IC50 of 56.9 nM. SelSA inhibits the phosphorylation of ERK1/2. SelSA inhibits the proliferation of breast cancer cells and hepatocellular carcinoma cells with IC50 of 0.58-2.6 μM, inhibits cell migration and invasion of Huh7, and induces apoptosis. SelSA exhibits antitumor activity in mouse model.
    SelSA
  • HY-156274
    HDAC6-IN-23
    		Inhibitor 99.61%
    HDAC6-IN-23 (compound 9) is an orally active HDAC6 inhibitor.
    HDAC6-IN-23
  • HY-118672
    HNHA
    		Inhibitor 99.76%
    HNHA is a potent HDAC inhibitor with an IC50 of 100 nM. HNHA arrests the cell cycle at the G1/S phase via p21 induction. HNHA inhibits tumor growth and tumor neovascularization. HNHA may be a potent anti-cancer agent against breast cancer.
    HNHA
  • HY-RS06070
    HDAC3 Human Pre-designed siRNA Set A
    		Inhibitor

    HDAC3 Human Pre-designed siRNA Set A contains three designed siRNAs for HDAC3 gene (Human), as well as a negative control, a positive control, and a FAM-labeled negative control.
    HDAC3 Human Pre-designed siRNA Set A
  • HY-156422
    KPZ560
    		Inhibitor 99.72%
    KPZ560 is a potent inhibitor of HDAC1 and HDAC2, with IC50s of 12 nM and 68 nM, respectively. KPZ560 can increase in the spine density of granule neuron dendrites of mice and inhibitor cell growth of breast cancer cell line MCF.
    KPZ560
  • HY-156027
    SIRT6-IN-3
    		Inhibitor 98.19%
    SIRT6-IN-3 (compound 8a) is a selective inhibitor of SIRT6 (IC50=7.49 μM). SIRT6-IN-3 inhibits pancreatic ductal adenocarcinoma (PDAC) cells proliferation and induces apoptosis. SIRT6-IN-3 increases the sensitivity of cancer cells to gemcitabine (HY-17026) via blocking the DNA damage repair pathway. SIRT6-IN-3 is used in pancreatic cancer research.
    SIRT6-IN-3
  • HY-RS06064
    HDAC11 Human Pre-designed siRNA Set A
    		Inhibitor

    HDAC11 Human Pre-designed siRNA Set A contains three designed siRNAs for HDAC11 gene (Human), as well as a negative control, a positive control, and a FAM-labeled negative control.
    HDAC11 Human Pre-designed siRNA Set A
  • HY-156850
    ITF 3756
    		Inhibitor 98.55%
    ITF 3756 is a selective, orally active HDAC6 inhibitor. ITF 3756 antagonizes TNF-α-induced activation of the NF-κB pathway. ITF 3756 reduces PD-L1 expression on human monocytes and CD8+ T cells, and exhibits antitumor activity. ITF 3756 can be used in colon cancer-related research.
    ITF 3756
  • HY-173444
    HDAC11-IN-3
    		Inhibitor 99.29%
    HDAC11-IN-3 (Compound A9) is a selective HDAC11 inhibitor (IC50: 4.1 nM). HDAC11-IN-3 has inhibitory effects on U937 and OCI-AML2 acute myeloid leukemia (AML) cell lines (IC50: 10 μM). HDAC11-IN-3 has significant anti-AML activity, inducing apoptosis, cell cycle arrest, and differentiation. HDAC11-IN-3 upregulates the iron transporters transferrin (TF) and transferrin receptor (TFRC), and activates the p62-Keap1-Nrf2-HMOX1 pathway, which together lead to increased intracellular iron levels and induce ferroptosis in AML cells. HDAC11-IN-3 can be used alone or in combination with Cytarabine (HY-13605) for AML research.
    HDAC11-IN-3
  • HY-149966
    PB131
    		Inhibitor 99.47%
    PB131 is a selective and brain-permeable HDAC6 inhibitor with high binding affinity (IC50: 1.8 nM). PB131 has potent anti-inflammatory activity. PB131 can be used for research of inflammation, especially neuroinflammation.
    PB131
Cat. No. Product Name / Synonyms Application Reactivity
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Download HDAC Signaling Pathway Map.

TCR, GPCR and HDAC II interaction: Diverse agonists act through G-protein-coupled receptors (GPCRs) to activate the PKC-PKD axis, CaMK, Rho, or MHC binding to antigens stimulates TCR to activate PKD, leading to phosphorylation of class II HDACs. Phospho-HDACs dissociate from MEF2, bind 14-3-3, and are exported to the cytoplasm through a CRM1-dependent mechanism. CRM1 is inhibited by leptomycin B (LMB). Release of MEF2 from class II HDACs allows p300 to dock on MEF2 and stimulate gene expression. Dephosphorylation of class II HDACs in the cytoplasm enables reentry into the nucleus[1].

 

TLR: TLR signaling is initiated by ligand binding to receptors. The recruitment of TLR domain-containing adaptor protein MyD88 is repressed by HDAC6, whereas NF-κB and MTA-1 can be negatively regulated by HDAC1/2/3 and HDAC2, respectively. Acetylation by HATs enhance MKP-1 which inhibits p38-mediated inflammatory responses, while HDAC1/2/3 inhibits MKP-1 activity. HDAC1 and HDAC8 repress, whereas HDAC6 promotes, IRF function in response to viral challenge. HDAC11 inhibits IL-10 expression and HDAC1 and HDAC2 represses IFNγ-dependent activation of the CIITA transcription factor, thus affecting antigen presentation[2][3].

 

IRNAR: IFN-α/β induce activation of the type I IFN receptor and then bring the receptor-associated JAKs into proximity. JAK adds phosphates to the receptor. STATs bind to the phosphates and then phosphorylated by JAKs to form a dimer, leading to nuclear translocation and gene expression. HDACs positively regulate STATs and PZLF to promote antiviral responses and IFN-induced gene expression[2][3].

 

Cell cycle: In G1 phase, HDAC, Retinoblastoma protein (RB), E2F and polypeptide (DP) form a repressor complex. HDAC acts on surrounding chromatin, causing it to adopt a closed chromatin conformation, and transcription is repressed. Prior to the G1-S transition, phosphorylation of RB by CDKs dissociates the repressor complex. Transcription factors (TFs) gain access to their binding sites and, together with the now unmasked E2F activation domain. E2F is then free to activate transcription by contacting basal factors or by contacting histone acetyltransferases, such as CBP, that can alter chromatin structure[4].

 

The function of non-histone proteins is also regulated by HATs/HDACs. p53: HDAC1 impairs the function of p53. p53 is acetylated under conditions of stress or HDAC inhibition by its cofactor CREB binding protein (CBP) and the transcription of genes involved in differentiation is activated. HSP90: HSP90 is a chaperone that complexes with other chaperones, such as p23, to maintain correct conformational folding of its client proteins. HDAC6 deacetylates HSP90. Inhibition of HDAC6 would result in hyperacetylated HSP90, which would be unable to interact with its co-chaperones and properly lead to misfolded client proteins being targeted for degradation via the ubiquitin-proteasome system[5][6].
 

Reference:

[1]. Vega RB, et al. Protein kinases C and D mediate agonist-dependent cardiac hypertrophy through nuclear export of histone deacetylase 5.Mol Cell Biol. 2004 Oct;24(19):8374-85.
[2]. Shakespear MR, et al. Histone deacetylases as regulators of inflammation and immunity. Trends Immunol. 2011 Jul;32(7):335-43.
[3]. Suliman BA, et al. HDACi: molecular mechanisms and therapeutic implications in the innate immune system.Immunol Cell Biol. 2012 Jan;90(1):23-32. 
[4]. Brehm A, et al. Retinoblastoma protein meets chromatin.Trends Biochem Sci. 1999 Apr;24(4):142-5.
[5]. Butler R, et al. Histone deacetylase inhibitors as therapeutics for polyglutamine disorders.Nat Rev Neurosci. 2006 Oct;7(10):784-96
[6]. Minucci S, et al. Histone deacetylase inhibitors and the promise of epigenetic (and more) treatments for cancer.Nat Rev Cancer. 2006 Jan;6(1):38-51.

HDAC Isoform Comparison

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