1. Cell Cycle/DNA Damage
    Cell Cycle/DNA Damage
  2. DNA-PK
    Epigenetic Reader Domain

KU-57788 (Synonyms: KU 57788; NU-7441; KU57788; NU7441; NU 7441)

Cat. No.: HY-11006 Purity: 98.74%
Data Sheet SDS Handling Instructions

KU-57788 is a potent and selective inhibitor of DNA-PK, a modest inhibitor of BRD4 and BRDT, with IC50s of 13 nM, 1 μM and 3.5 μM, respectively, and also increases CRISPR/Cas9-mediated editing frequencies.

For research use only. We do not sell to patients.
KU-57788 Chemical Structure

KU-57788 Chemical Structure

CAS No. : 503468-95-9

Size Price Stock Quantity
10 mM * 1 mL in DMSO $61 In-stock
5 mg $55 In-stock
10 mg $90 In-stock
50 mg $288 In-stock
100 mg $403 In-stock
200 mg   Get quote  
500 mg   Get quote  

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KU-57788 is a potent and selective inhibitor of DNA-PK, a modest inhibitor of BRD4 and BRDT, with IC50s of 13 nM, 1 μM and 3.5 μM, respectively, and also increases CRISPR/Cas9-mediated editing frequencies.

IC50 & Target

IC50: 13 nM (DNA-PK)[3], 1 μM (BRD4), 3.5 μM (BRDT)[4]

In Vitro

NU7441 at non-toxic concentration of 0.3 μM induces radio-sensitization in non-small cell lung cancer cells irradiated with low-LET and high-LET radiation, and does not show double strand break-repair inhibition in irradiated cells. NU7441 (3 μM) shows significantly increased persistent γ-H2AX signals. NU7441 (0.3 μM) causes significant G2/M arrest and a remarkable increase of DNA fragmentation and enhances cellular senescence in irradiated H1299 cells[1]. NU7441 (0.5 to 10 µM) inhibits the growth of liver cancer HepG2 cells dose- and time-dependently. NU7441 reduces pDNA-PKcs (S2056) protein expression in liver cancer cells. Furthermore, double treatment of NU7441 and 60Coγ IR affects DNA damage repair[2]. NU7441 is solvent-exposed in BRD4, this inhibitor can be classified as a Type I BRD inhibitor[4]. NU7441 reduces the frequency of NHEJ while increasing the rate of HDR following Cas9-mediated DNA cleavage[5].

Preparing Stock Solutions
Concentration Volume (DMSO) Mass 1 mg 5 mg 10 mg
1 mM 2.4184 mL 12.0922 mL 24.1844 mL
5 mM 0.4837 mL 2.4184 mL 4.8369 mL
10 mM 0.2418 mL 1.2092 mL 2.4184 mL
Kinase Assay

The inhibitory activities of compounds against BRD4-1 and BRDT-1 are assessed by DSF using a StepOnePlus Real-Time PCR system. Purified BRD4-1 (4 μM final concentration; 10 mM HEPES (pH7.5), 100 mM NaCl, and 1 mM DTT), and BRDT-1 (4 μM final concentration; 50 mM phosphate (pH7.4), 100 mM NaCl, and 1 mM DTT) are assayed, in quadruplicates, in a 96-well plate. Inhibitors are added to a final concentration of 100 μM and 2% DMSO. Protein Thermal Shift Dye (1:8000) is used as the fluorescent probe, and fluorescence is measured using the ROX Reporter channel (620 nm). Protein stability is investigated by programing the thermocycler to increase the temperature from 25 to 99°C using 0.2°C increments and 10 s incubations per increment. The inflection point of the transition curve/melting temperature (Tm) is calculated using the Boltzmann equation within the Protein Thermal Shift Software (v.1.1). JQ1(+) and dinaciclib are used as controls for strong and weak binders of BRD4-1, respectively. The ΔTm is calculated by using DMSO control wells as a reference.

Cell Assay

HepG2 cells (4000 per well) are cultured in a 96-well plate for 24 h. Once the cells complete the attachment, 0.1 µM, 1 µM, 5 µM, and 10 µM of NU7441 are added to the culture media. After 12 h of NU7441 treatment, 10% CCK-8 solution is added into the culture media, and the incubation continued for two h. OD450 values are determined by a spectrometer, and the results are analyzed to measure the cell growth.








Please store the product under the recommended conditions in the Certificate of Analysis.


Room temperature in continental US; may vary elsewhere

Solvent & Solubility

10 mM in DMSO

* "<1 mg/mL" means slightly soluble or insoluble. "≥" means soluble, but saturation unknown.

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