NI-57 是溴结构域和植物同源锌指结构域 (BRPF) 蛋白家族的一种抑制剂，对 BRPF1、BRPF2 (BRD1) 和 BRPF3 的IC50值分别为 3.1、46 和 140 nM。
产品描述
NI-57 is an inhibitor of proteins of bromodomain and plant homeodomain finger-containing (BRPF) family, with IC50s of 3.1, 46 and 140 nM for BRPF1, BRPF2 (BRD1) and BRPF3, respectively.
体外活性
NI-57 binds the BRD of BRPF1 with a Kd of 31 nM, BRD1 with a Kd of 110 nM, and BRPF3 with a Kd of 410 nM, whereas binding to BRD9 is weaker (Kd 1000 nM) measured by isothermal titration calorimetry. NI-57 shows less active effect on BRD9 (IC50, 520 nM) and BRD4 (BD1) (IC50, 3700 nM), TRIM24 (IC50, 1600 nM). NI-57 also inhibits BRPF BRDs in the nucleus but shows little effect on the proliferation of many cancer cell lines with GI50s of 10.4 μM (NCI-H1703 cells), 14.7 μM (DMS114), 15.6 μM (HRA-19), and 16.6 μM (RERF-LC-Sq1). Furthermore, Inhibition on BRPF1 of NI-57 (10 μM) reduces the gene expression of CCL-22 by 27.7%.
激酶实验
All reagents are diluted in the recommended buffer (50 mM HEPES, 100 mM NaCl, 0.1% BSA; pH = 7.4) supplemented with 0.05% CHAPS and allowed to equilibrate to room temperature prior to addition to plates. 4 mL of HIS-tagged protein is added to low-volume 384-well plates, followed by 4 mL of either buffer, non-biotinylated peptide, solvent or compounds (NI-57, etc.). Plates are sealed and incubated at room temperature for 30 minutes, before the addition of 4 mL biotinylated peptide, resealing and incubation for a further 30 minutes. 4 mL of streptavidin-coated donor beads (25 μg/mL) and 4 μL of nickel chelate acceptor beads (25 μg/mL) are then added under low light conditions. Plates are foil-sealed to protect from light, incubated at room temperature for 60 minutes and read on a PHERAstar FS plate reader using an AlphaScreenTM 680 excitation/570 emission filter set. IC50s are calculated in GraphPad Prism 5. Results for compounds (NI-57, etc.) dissolved in DMSO are normalized against corresponding DMSO controls prior to IC50 determination, which is given as the final concentration of the compound in the 20 μL reaction volume.
Cas No.
1883548-89-7
分子式
C19H17N3O4S
分子量
383.42
储存和溶解度
DMSO:80 mg/mL (208.65 mM)
Powder: -20°C for 3 years
In solvent: -80°C for 2 years
