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    UNC1999
    UNC1999

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    This product is for research use only, not for human use. We do not sell to patients.
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    InvivoChem Cat #: V0385
    CAS #: 1431612-23-5 Purity ≥98%

    Description: UNC1999 (UNC-1999) is an orally bioavailable, cell-permeable, selective, SAM-competitive and dual inhibitor of EZH2/EZH1 (Enhancer of zeste homolog) with antineoplastic activity. It inhibits EZH2/EZH1 with IC50s of 2 nM and 45 nM in cell-free assays, respectively, and shows >1000-fold selectivity for EZH2/EZH1 over a variety of epigenetic and non-epigenetic targets.  

    References: ACS Chem Biol. 2013;8(6):1324-34.

    Related CAS: 1433200-49-7 (UNC2400)

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    Molecular Weight (MW)569.74
    FormulaC33H43N7O2
    CAS No.1431612-23-5
    Storage-20℃ for 3 years in powder form
    -80℃ for 2 years in solvent
    Solubility (In vitro)DMSO: 100 mg/mL (175.5 mM)
    Water: <1 mg/mL
    Ethanol: <1 mg/mL
    Other info
    Chemical Name: 1-isopropyl-6-(6-(4-isopropylpiperazin-1-yl)pyridin-3-yl)-N-((6-methyl-2-oxo-4-propyl-1,2-dihydropyridin-3-yl)methyl)-1H-indazole-4-carboxamide
    InChi Key: DPJNKUOXBZSZAI-UHFFFAOYSA-N
    InChi Code: InChI=1S/C33H43N7O2/c1-7-8-24-15-23(6)37-33(42)28(24)19-35-32(41)27-16-26(17-30-29(27)20-36-40(30)22(4)5)25-9-10-31(34-18-25)39-13-11-38(12-14-39)21(2)3/h9-10,15-18,20-22H,7-8,11-14,19H2,1-6H3,(H,35,41)(H,37,42)
    SMILES Code: O=C(NCC1=C(CCC)C=C(C)NC1=O)C2=C3C(N(C(C)C)N=C3)=CC(C4=CC=C(N5CCN(C(C)C)CC5)N=C4)=C2 
    SynonymsUNC1999; UNC 1999; UNC-1999;


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    In Vitro

    In vitro activity: UNC1999 is highly potent for both EZH2 Y641N and EZH2 Y641F mutants in vitro. UNC1999 causes concentration-dependent reductions of H3K27me3 in MCF10A cells with IC50 of 124 nM , while shows low cellular toxicity. UNC1999 displays potent, concentration-dependent inhibition of cell proliferation with EC50 of 633 nM in a DLBCL cell line harboring the EZH2Y641N mutant. In addition, biotinylated UNC1999 enriches EZH2 from HEK293T cell lysates, and thus may be used in chemoproteomics studies.


    Kinase Assay: Methyltransferase activity assays are performed by monitoring the incorporation of tritiumlabeled methyl group from S-adenosylmethionine (3H-SAM) to biotinylated peptide substrates using Scintillation Proximity Assay (SPA) for PRC2-EZH2 trimeric complex (EZH2:EED:SUZ12), PRC2-EZH1 pentameric complex (EZH1:EED:SUZ12:RBBP4:AEBP2), SETD7, G9a, GLP, SETDB1, SETD8, SUV420H1, SUV420H2, SUV39H2, MLL1 tetrameric complex (MLL:WDR5:RbBP5:ASH2L), PRMT1, PRMT3, PRMT5-MEP50 complex and SMYD2. The reaction buffer for SMYD2 and SMYD3 is 50 mM Tris pH 9.0, 5 mM DTT, 0.01% TritonX-100; for G9a, GLP and SUV39H2 is 25 mM potassium phosphate pH 8.0, 1 mM EDTA, 2 mM MgCl2 and 0.01% Triton X-100; and for other HMTs 20 mM Tris pH 8.0, 5 mM DTT, 0.01% TritonX-100. To stop the enzymatic reactions, 10 μL of 7.5 M guanidine hydrochloride is added, followed by 180 μL of buffer, mixed and transferred to a 384-well FlashPlate. After mixing, the reaction mixtures are incubated and the CPM counts are measured using Topcount plate reader. The CPM counts in the absence of compound for each data set are defined as 100% activity. In the absence of the enzyme, the CPM counts in each data set are defined as background (0%). IC50 values are determined using compound concentrations ranging from 100 nM to 100 μM. The IC50 values are determined using SigmaPlot software. EZH2-Y641F assays are performed using 30 nM of enzyme in 20 mM Tris pH 8, 5 mM DTT, 0.01% Triton X-100, 5 μM SAM and 1 μM of H3 (1-24) peptide (same as for the wild-type PRC2-EZH2 complex). For DNMT1, the assay is performed using hemimethylated dsDNA as a substrate. The dsDNA substrate is prepared by annealing two complementary strands (biotintlated forward strand: BGAGCCCGTAAGCCCGTTCAGGTCG and reverse strand: CGACCTGAACGGGCTTACGGGCTC), synthesized by Eurofins MWG Operon. Reaction buffer is 20 mM Tris-HCl, pH 8.0, 5mM DTT, 0.01% Triton X-100. Methyltransferase activity assays for DOT1L is performed using Filter-plates. Reaction mixtures in 20 mM Tris-HCl, pH 8.0, 5 mM DTT, 2 mM MgCl2 and 0.01% Triton X-100 are incubated at room temperature for 1h, 100 μL 10% TCA is added, mixed and transferred to filter-plate. Plates are centrifuged at 2000 rpm for 2 min followed by 2 additional 10% TCA wash and one ethanol wash (180 μL) followed by centrifugation. Plates are dried and 100 μL MicroO is added and centrifuged. 70 μL MicroO is added and CPM are measured using Topcount plate reader.


    Cell Assay: DB cells, a diffuse-large B-cell lymphoma cell line harboring the EZH2 Y641N mutation, are obtained from ATCC and cultured in RPMI 1640 supplemented with 10% fetal bovine serum, antibiotics, and various concentrations of compounds (DMSO control, UNC1999, or UNC2400). The medium containing the test compound or control is refreshed every 3 days. The numbers of viable cells from at least three independent experiments are measured using TC20 automated cell counter system. Total histones are prepared from cell nuclei using an acidic extraction protocol. About 1 μg of total histones is separated using 15% SDS-PAGE, transferred to PVDF membranes, and probed with histone antibodies. Antibodies used in this study are those against EZH2, general H3, and H3K27me3.

    In VivoTreatment of UNC1999 (150 and 50 mg/kg, i.p.) results in the plasma concentrations of UNC1999 above its cellular IC50 over 24 hours in vivo. In addition, UNC1999 is also orally bioavailable in mice, which makes chronic animal studies more practical and convenient.
    Animal model Male Swiss albino mice
    Formulation & Dosage Dissolved in DMSO;  ~150 mg/kg (i.p.), ~50 mg/kg (oral); i.p.injection or oral administration
    References

    ACS Chem Biol. 2013;8(6):1324-34.


    These protocols are for reference only. InvivoChem does not independently validate these methods.

    UNC1999
    Biotinylated UNC1999 (UNC2399) enriches EZH2 from HEK293T cell lysates. ACS Chem Biol. 2013 Jun 21; 8(6): 1324–1334.



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