1. Signaling Pathways
  2. Cell Cycle/DNA Damage
    Epigenetics
  3. 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-126147
    J22352
    Inhibitor 99.04%
    J22352 is a PROTAC (proteolysis-targeting chimeras)-like and highly selective HDAC6 inhibitor with an IC50 value of 4.7 nM. J22352 promotes HDAC6 degradation and induces anticancer effects by inhibiting autophagy and eliciting the antitumor immune response in glioblastoma cancers, and leading to the restoration of host antitumor activity by reducing the immunosuppressive activity of PD-L1.
    J22352
  • HY-143248
    KR-39038
    Inhibitor 99.68%
    KR-39038 is an orally active and potent GRK5 (G protein-coupled receptor kinase 5) inhibitor, with an IC50 of 0.02 μM. KR-39038 significantly inhibits angiotensin II-induced cellular hypertrophy through suppression of HDAC5 pathway in neonatal cardiomyocytes. KR-39038 shows profound anti-hypertrophic effects and improved cardiac function. KR-39038 can be used for heart failure research.
    KR-39038
  • 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
    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-14842A
    Givinostat hydrochloride
    Inhibitor 98.06%
    Givinostat (ITF-2357) hydrochloride is a HDAC inhibitor with an IC50 of 198 and 157 nM for HDAC1 and HDAC3, respectively. Givinostat hydrochloride can penetrate the blood-brain barrier (BBB)..
    Givinostat hydrochloride
  • HY-18712
    BG45
    Inhibitor 99.95%
    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-10224A
    Panobinostat lactate
    Inhibitor 98.67%
    Panobinostat lactate is a potent and orally active non-selective HDAC inhibitor. Panobinostat lactate has antineoplastic activities. Panobinostat lactate effectively disrupts HIV latency. Panobinostat lactate induces cell apoptosis and autophagy. Panobinostat lactate can be used for the study of refractory or relapsed multiple myeloma.
    Panobinostat lactate
  • HY-150109
    Purinostat mesylate
    Inhibitor 99.45%
    Purinostat mesylate is a selective inhibitor of HDAC. Purinostat mesylate inhibits class I and class IIb HDACs with IC50s from 0.81 to 11.5 nM. Purinostat mesylate induces apoptosis and affects cell cycle of LAMA84 and 188 BL-2 cells, and shows potently anti-leukemia effects in vivo. Purinostat mesylate can be used for the research of lymphoblastic leukemia.
    Purinostat mesylate
  • HY-14718A
    Resminostat hydrochloride
    Inhibitor 99.67%
    Resminostat hydrochloride is a potent inhibitor of HDAC1, HDAC3 and HDAC6, with mean IC50 values of 42.5, 50.1, 71.8 nM, respectively, and shows less potent activities against HDAC8, with an IC50 of 877 nM.
    Resminostat hydrochloride
  • HY-16138A
    Ivaltinostat formic
    Inhibitor 98.04%
    Ivaltinostat (CG-200745) formic is an orally active, potent pan-HDAC inhibitor which has the hydroxamic acid moiety to bind zinc at the bottom of catalytic pocket. Ivaltinostat formic inhibits deacetylation of histone H3 and tubulin. Ivaltinostat formic induces the accumulation of p53, promotes p53-dependent transactivation, and enhances the expression of MDM2 and p21 (Waf1/Cip1) proteins. Ivaltinostat formic enhances the sensitivity of Gemcitabine-resistant cells to Gemcitabine (HY-16138) and 5-Fluorouracil (5-FU; HY-90006). Ivaltinostat formic induces apoptosis and has anti-tumour effects.
    Ivaltinostat formic
  • HY-173266A
    TO-1187 TFA
    Degrader 98.41%
    TO-1187 TFA is a selective HDAC6 PROTAC degrader (DC50: 5.81 nM). TO-1187 TFA promotes the ubiquitination and degradation of HDAC6 and can be used in the study of hematological malignancies and solid tumors (Pink: HDAC6 ligand (HY-173386); Blue: CRBN ligase ligand (HY-41547); Black: linker (HY-140212)).
    TO-1187 TFA
  • HY-N7676
    Marein
    Inhibitor 99.71%
    Marein has the neuroprotective effect due to a reduction of damage to mitochondria function and activation of the AMPK signal pathway. Marein improves insulin resistance induced by high glucose in HepG2 cells through CaMKK/AMPK/GLUT1 to promote glucose uptake, through IRS/Akt/GSK-3β to increase glycogen synthesis, and through Akt/FoxO1 to decrease gluconeogenesis. Marein is a HDAC inhibitor with an IC50 of 100 μM. Marein has beneficial antioxidative, antihypertensive, antihyperlipidemic and antidiabetic effects.
    Marein
  • HY-153606
    VUBI1 analogue-1
    98.94%
    VUBI1 analogue-1 (compound 79) is a VUBI1 (HY-111671) analogue. VUBI1 (SOS1 activator 1) is a SOS1 activator with a Kd of 44 nM. VUBI1 analogue-1 can be used to synthesize (4S)-PROTAC SOS1 degrader-1 (HY-144657)[1].
    VUBI1 analogue-1
  • HY-171139
    PROTAC HDAC6 degrader 2
    Inhibitor 99.80%
    PROTAC HDAC6 degrader 2 (Compound 1) is a HDAC6 PROTAC degrader, with IC50 of 0.643 μM. PROTAC HDAC6 degrader 2 promotes ubiquitination and degradation of HDAC6. PROTAC HDAC6 degrader 2 can be used for the research of haematological and solid cancers (Pink: HDAC6 ligand (HY-171141); Blue: E3 ligase CRBN ligand (HY-10984)).
    PROTAC HDAC6 degrader 2
  • HY-161464
    Chlopynostat
    Inhibitor 98.36%
    Chlopynostat (Compound 6c) is a HDAC1 inhibitor with a IC50 value of 67 nM. Chlopynostat reverses STAT4/p66Shc defects by inhibiting HDAC1-induced < b>Apoptosis.
    Chlopynostat
  • HY-117348
    NCC-149
    Inhibitor 99.29%
    NCC-149 is a selective HDAC8 inhibitor and can be used for neural differentiation research.
    NCC-149
  • HY-162361
    HDAC1-IN-7
    Inhibitor 99.97%
    HDAC1-IN-7 (compound 9) is potent HDAC1 inhibitor, with the IC50 of 0.957 mM.
    HDAC1-IN-7
  • HY-117709
    BRD6688
    Inhibitor 98.06%
    BRD6688 is a selective HDAC2 inhibitor. BRD6688 increases H4K12 and H3K9 histone acetylation in primary mouse neuronal cells. BRD6688 crosses the blood brain barrier and rescues the memory defects associated with p25 induced neurodegeneration in contextual fear conditioning in a CK-p25 mouse model.
    BRD6688
  • HY-100585
    Splitomicin
    Inhibitor 98.42%
    Splitomicin (Splitomycin) is a selective Sir2p inhibitor. Splitomicin inhibits NAD+-dependent HDAC activity of Sir2 protein. Splitomicin induces dose-dependent inhibition of HDAC in the yeast extract with an IC50 of 60 μM.
    Splitomicin
  • HY-152147
    SZUH280
    Degrader 99.38%
    SZUH280 is a potent and selective PROTAC HDAC8 degrader with a DC50 of 0.58 μM in A549 cells. SZUH280 induces cancer cell apoptosis. SZUH280 hampers DNA damage repair in cancer cells, promoting cellular radiosensitization.
    SZUH280
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.

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