1. Epigenetics
  2. Histone Acetyltransferase
  3. PU139

PU139 is a potent pan-histone acetyltransferase (HAT) inhibitor. PU139 blocks the HATs Gcn5, p300/CBP-associated factor (PCAF), CREB (cAMP response element-binding) protein (CBP) and p300 with IC50s of 8.39, 9.74, 2.49 and 5.35 μM, respectively.

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PU139 Chemical Structure

PU139 Chemical Structure

CAS No. : 158093-65-3

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
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Based on 3 publication(s) in Google Scholar

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Description

PU139 is a potent pan-histone acetyltransferase (HAT) inhibitor. PU139 blocks the HATs Gcn5, p300/CBP-associated factor (PCAF), CREB (cAMP response element-binding) protein (CBP) and p300 with IC50s of 8.39, 9.74, 2.49 and 5.35 μM, respectively[1][2].

IC50 & Target[1]

GCN5

8.39 μM (IC50)

CREBBP

2.49 μM (IC50)

PCAF

9.74 μM (IC50)

p300

5.35 μM (IC50)

Cellular Effect
Cell Line Type Value Description References
HL-60 GI50
3.42 μM
Compound: 1, PU139
Cytotoxicity against human HL60 cells assessed as growth inhibition after 72 hrs by MTS assay
Cytotoxicity against human HL60 cells assessed as growth inhibition after 72 hrs by MTS assay
10.1039/C4MD00245H
HL-60 GI50
3.42 μM
Compound: 67
Antiproliferative activity against human HL-60 cells incubated for 72 hrs by CellTiter 96 Aqueous non-radioactive cell proliferation assay
Antiproliferative activity against human HL-60 cells incubated for 72 hrs by CellTiter 96 Aqueous non-radioactive cell proliferation assay
[PMID: 33045661]
LNCaP GI50
36.2 μM
Compound: 1, PU139
Cytotoxicity against human LNCAP cells assessed as growth inhibition after 72 hrs by MTS assay
Cytotoxicity against human LNCAP cells assessed as growth inhibition after 72 hrs by MTS assay
10.1039/C4MD00245H
MCF7 GI50
37.2 μM
Compound: 4d
Growth inhibition of human MCF7 cells by CellTiter-96 Aqueous Non-radioactive cell proliferation assay
Growth inhibition of human MCF7 cells by CellTiter-96 Aqueous Non-radioactive cell proliferation assay
[PMID: 21353783]
Sf9 IC50
10 μM
Compound: PU139
Inhibition of recombinant human N-terminal His-GST-tagged p300 (965 to 1810 residues) expressed in baculovirus infected Sf9 insect cells preincubated for 10 mins in presence of biotinylated-histone H3/H4 followed by acetyl-CoA addition and measured after
Inhibition of recombinant human N-terminal His-GST-tagged p300 (965 to 1810 residues) expressed in baculovirus infected Sf9 insect cells preincubated for 10 mins in presence of biotinylated-histone H3/H4 followed by acetyl-CoA addition and measured after
[PMID: 31910017]
SK-N-SH GI50
10.3 μM
Compound: 4d
Growth inhibition of human SK-N-SH cells by CellTiter-96 Aqueous Non-radioactive cell proliferation assay
Growth inhibition of human SK-N-SH cells by CellTiter-96 Aqueous Non-radioactive cell proliferation assay
[PMID: 21353783]
In Vitro

PU139 inhibits cell growth with GI50s of <60 μM (A431, A549, A2780, HepG2, SW480, U-87 MG, HCT116 and SK-N-SH and MCF7 cells)[1].
PU139 (0-100 μM; 24-72 hours) triggers caspase-independent cell death in the neuroblastoma cell line SK-N-SH[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

PU139 (25 mg/kg; i.p.) synergizes with Doxorubicin used as a prototypic chemotherapeutic drug in growth inhibition[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Male NMRI:nu/nu mice (Neuroblastoma xenografts)[1]
Dosage: 25 mg/kg
Administration: Intraperitoneally (PU139) with Dxorubicin at 8 mg/kg i.v.; Administered on days 14 and 21 as a single dose of each compound or, for combination therapy; both drugs were administered successively within 1 h.
Result: Optimum growth inhibition following a single PU139 therapy was moderate, but significant as compared with the untreated group and confirmed the previous findings.
Molecular Weight

246.26

Formula

C12H7FN2OS

CAS No.
Appearance

Solid

Color

Off-white to yellow

SMILES

O=C1N(C2=CC=C(F)C=C2)SC3=NC=CC=C31

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

Solvent & Solubility
In Vitro: 

DMSO : 10 mg/mL (40.61 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 4.0607 mL 20.3037 mL 40.6075 mL
5 mM 0.8121 mL 4.0607 mL 8.1215 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

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In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 1 mg/mL (4.06 mM); Clear solution

    This protocol yields a clear solution of ≥ 1 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (10.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% Corn Oil

    Solubility: 1 mg/mL (4.06 mM); Clear solution; Need ultrasonic and warming and heat to 60°C

    This protocol yields a clear solution of 1 mg/mL. If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (10.0 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
DMSO +
+
%
Tween-80 +
%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation

Purity: 99.51%

References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 4.0607 mL 20.3037 mL 40.6075 mL 101.5187 mL
5 mM 0.8121 mL 4.0607 mL 8.1215 mL 20.3037 mL
10 mM 0.4061 mL 2.0304 mL 4.0607 mL 10.1519 mL
15 mM 0.2707 mL 1.3536 mL 2.7072 mL 6.7679 mL
20 mM 0.2030 mL 1.0152 mL 2.0304 mL 5.0759 mL
25 mM 0.1624 mL 0.8121 mL 1.6243 mL 4.0607 mL
30 mM 0.1354 mL 0.6768 mL 1.3536 mL 3.3840 mL
40 mM 0.1015 mL 0.5076 mL 1.0152 mL 2.5380 mL
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Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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