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

HDAC

HDAC

Histone deacetylases

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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-126330
    SS-208
    Inhibitor 99.00%
    SS-208 is a selective HDAC6 inhibitor, with an IC50 of 12 nM. SS-208 possesses anti-tumor activity in melanoma.
    SS-208
  • HY-19747
    HPOB
    Inhibitor 99.80%
    HPOB is a highly potent and selective inhibitor of HDAC6 with an IC50 of 56 nM. HPOB displays >30 fold less potent against other HDACs. HPOB enhances the effectiveness of DNA-damaging anticancer agents in transformed cells but not normal cells. HPOB does not block the ubiquitin-binding activity of HDAC6.
    HPOB
  • HY-144782A
    HDAC10-IN-2 hydrochloride
    Inhibitor
    HDAC10-IN-2 hydrochloride (compound 10c) is a potent and highly selective HDAC10 inhibitor, with an IC50 of 20 nM. HDAC10-IN-2 hydrochloride modulates autophagy in aggressive FLT3-ITD positive acute myeloid leukemia cells.
    HDAC10-IN-2 hydrochloride
  • HY-N2150
    Psammaplin A
    Inhibitor
    Psammaplin A is a marine metabolite. Psammaplin A is a selective HDAC1 (IC50: 45 nM), DNA methyltransferases (IC50: 18.6 nM) and aminopeptidase N (APN) (IC50: 18 μM) inhibitor. Psammaplin A also inhibits DNA topoisomerase and farnesyl protein transferase. Psammaplin A is a PPARγ activator and induces apoptosis. Psammaplin A has antitumor and anti-inflammatory activities. Psammaplin A has antibacterial activity against Gram-positive bacteria and inhibits DNA synthesis and DNA gyrase activity. Psammaplin A inhibits angiogenesis.
    Psammaplin A
  • HY-102033
    Oxamflatin
    Inhibitor 98.13%
    Oxamflatin (Metacept-3) is a potent HDAC inhibitor with an IC50 of 15.7 nM. Oxamflatin is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
    Oxamflatin
  • HY-132242
    DL-Sulforaphane N-acetyl-L-cysteine
    Inhibitor 99.90%
    DL-Sulforaphane N-acetyl-L-cysteine (SFN-NAC) is an orally active HDAC inhibitor and metabolite of sulforaphane (HY-13755) with longer half-life and better blood-brain barrier permeability. DL-Sulforaphane N-acetyl-L-cysteine activates autophagy-mediated downregulation of α-tubulin expression through the ERK pathway and can be used in cancer research.
    DL-Sulforaphane N-acetyl-L-cysteine
  • HY-W009776
    Suberoyl bis-hydroxamic acid
    Inhibitor ≥98.0%
    Suberoyl bis-hydroxamic acid (Suberohydroxamic acid; SBHA) is a competitive and cell-permeable HDAC1 and HDAC3 inhibitor with ID50 values of 0.25 μM and 0.30 μM, respectively.Suberoyl bis-hydroxamic acid renders MM cells susceptible to apoptosis and facilitates the mitochondrial apoptotic pathways.Suberoyl bis-hydroxamic acid can be used for the study of medullary thyroid carcinoma (MTC).
    Suberoyl bis-hydroxamic acid
  • HY-18712
    BG45
    Inhibitor 99.96%
    BG45 is a potent HDAC3 inhibitor with IC50 values of 0.289, 2, 2.2 and ﹥20 μM for HDAC3, HDAC1, HDAC2 and HDAC6, respectively. BG45 selectively targets multiple myeloma (MM) cells and induces caspase-dependent apoptosis.
    BG45
  • HY-100365
    Remetinostat
    Inhibitor ≥98.0%
    Remetinostat (SHP-141) is a hydroxamic acid-based histone deacetylase (HDAC) inhibitor. Remetinostat alleviates Imiquimod (HY-B0180)-induced psoriatic dermatitis. Remetinostat can be used for study of cutaneous T-cell lymphoma.
    Remetinostat
  • HY-114414
    HDACs/mTOR Inhibitor 1
    Inhibitor 99.01%
    HDACs/mTOR Inhibitor 1 is a dual HDAC.html" class="link-product" target="_blank">HDACs and mTOR.html" class="link-product" target="_blank">mTOR inhibitor, with IC50s of 0.19 nM, 1.8 nM, 1.2 nM for HDAC1, HDAC6, mTOR, respectively. HDACs/mTOR Inhibitor 1 stimulates cell cycle arrest in G0/G1 phase and induces tumor cell apoptosis with low toxicity in vivo. HDACs/mTOR Inhibitor 1 can be used in the research of hematologic malignancies.
    HDACs/mTOR Inhibitor 1
  • HY-B1505
    Acefylline
    99.96%
    Acefylline, a xanthine derivative, is an adenosine receptor antagonist. Acefylline is a peptidylarginine deiminase (PAD) activator. Acefylline is also a bronchodilator and cardiac stimulant that inhibits rat lung cAMP phosphodiesterase isoenzymes. Acefylline can be used in asthma research.
    Acefylline
  • HY-N6017
    Bakkenolide A
    Inhibitor 99.99%
    Bakkenolide A is a natural product extracted from Petasites tricholobus. Bakkenolide A inhibits leukemia by regulation of HDAC3 and PI3K/Akt-related signaling pathways.
    Bakkenolide A
  • HY-164050
    HDAC2-IN-2
    Inhibitor 99.74%
    HDAC2-IN-2 (compound 124) is an inhibitor of HDAC2 with Kd value of 0.1-1 μM.
    HDAC2-IN-2
  • HY-B0896
    Triacetin
    Inhibitor 99.58%
    Triacetin (Glyceryl triacetate) is a synthetic compound that is a triester of glycerol and acetic acid, orally active. Triacetin increases acetate bioavailability in glioma cells. Triacetin induces glioma cell growth arrest and Apoptosis. Triacetin freely crosses the blood brain barrier/plasma membrane. Triacetin increases histone acetylation and enhances Temozolomide (HY-17364) (TMZ) chemotherapeutic efficacy .
    Triacetin
  • HY-135890
    CG347B
    Inhibitor 98.93%
    CG347B is a selective HDAC6 inhibitor, also involves in synthesis of other metalloenzyme inhibitors. HDAC6 inhibitors can be used for oncology, immunology, and neurology research.
    CG347B
  • 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-123976
    MPT0G211
    Inhibitor 99.79%
    MPT0G211 is a potent, orally active and selective HDAC6 inhibitor (IC50=0.291 nM). MPT0G211 displays >1000-fold selective for HDAC6 over other HDAC isoforms. MPT0G211 can penetrate the blood-brain barrier. MPT0G211 ameliorates tau phosphorylation and cognitive deficits in an Alzheimer’s disease model. MPT0G211 has anti-metastatic and neuroprotective effects. Anticancer activities.
    MPT0G211
  • HY-161149
    CM-1758
    Inhibitor 98.44%
    CM-1758 is a histone deacetylase (HDAC) inhibitor. CM-1758 inhibits tumor growth in vivo. CM-1758 induces acetylation of non-histone proteins in acute myeloid leukemia cells.
    CM-1758
  • HY-10585R
    Valproic acid (Standard)
    Inhibitor
    Valproic acid (Dipropylacetic Acid) (Standard) is an analytical standard for valproic acid. This product is intended for research and analytical applications. Valproic acid is an orally active HDAC inhibitor (IC50=0.5-2 mM), inhibits the activity of HDAC1 (IC50=400 μM), and induces the degradation of HDAC2. Valproic acid activates Notch1 signaling and inhibits the proliferation of small cell lung cancer (SCLC) cells. Valproic acid is used in the study of epilepsy, bipolar disorder, metabolic diseases, HIV infection, and migraine.
    Valproic acid (Standard)
  • HY-12310
    RSC133
    Inhibitor ≥98.0%
    RSC133 exhibits dual activity by inhibiting histone deacetylase and DNA methyltransferase. RSC133 effectively facilitates reprogramming of human somatic cells to pluripotent stem cells and supports the maintenance of an undifferentiated state of human pluripotent stem cells.
    RSC133
Cat. No. Product Name / Synonyms Application Reactivity

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

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