CC-4047 19171-19-8 Actimid US9694015, 6.2 Pomalyst 4-amino-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione pomalidomide BDBM65456 US11059801, Compound D-4 US20230271966, Compound Pomalidomide
- Lopez-Girona, A; Mendy, D; Ito, T; Miller, K; Gandhi, AK; Kang, J; Karasawa, S; Carmel, G; Jackson, P; Abbasian, M; Mahmoudi, A; Cathers, B; Rychak, E; Gaidarova, S; Chen, R; Schafer, PH; Handa, H; Daniel, TO; Evans, JF; Chopra, R Cereblon is a direct protein target for immunomodulatory and antiproliferative activities of lenalidomide and pomalidomide. Leukemia 26: 2326-35 (2012)
- Zhang, F; Wu, Z; Chen, P; Zhang, J; Wang, T; Zhou, J; Zhang, H Discovery of a new class of PROTAC BRD4 degraders based on a dihydroquinazolinone derivative and lenalidomide/pomalidomide. Bioorg Med Chem 28: (2020)
- ChEMBL_1900220 (CHEMBL4402335) Displacement of (-)-thalidomide-alexa fluor/pomalidomide-fluorescein conjugated probe from DDBI fused CRBN (unknown origin) measured after 60 mins by fluorescence polarization assay
- Fluorescence thermal melt assay Thermal stabilities of CRBN-DDB1 in the presence or absence of phthalimide, thalidomide, lenalidomide and pomalidomide were done in the presence of Sypro Orange in a microplate format according to Pantoliano et al. Two ug of protein in 20 ul of assay buffer (25mM Tris HCl, pH 8.0, 150mM NaCl, 2 uM Sypro Orange) were subjected to stepwise increase of temperature from 20 to 70 °C and the fluorescence was read at every 1 °C on an ABIPrism 7900HT (Applied Biosystems, Carlsbad, CA, USA). Compounds were dissolved in DMSO (1% final in assay) and tested in quadruplicate at a concentration range between 30 nM to 1000 uM; controls contained 1% DMSO only.
- Fluorescence Polarization (FP) Assay Measuring compound ligand binding to CRBN-DDB1 was carried out using an established sensitive and quantitative in vitro fluorescence polarization (FP) based binding assay. (See, I. J. Enyedy et al, J. Med. Chem., 44: 313-4324 [2001]). Compounds were dispensed from serially diluted DMSO stock into black 384-well compatible fluorescence polarization plates using an Echo acoustic dispenser. Compound binding to CRBN-DDB1 was measured by displacement of either a (−)-Thalidomide-Alexa Fluor or Pomalidomide-fluorescein conjugated probe dye. A 20 μL mixture containing 400 nM CRBN-DDB1 and 5 nM probe dye in 50 mM Hepes, pH 7.4, 200 mM NaCl, 1% DMSO and 0.1% pluronic acid-127 acid was added to wells containing compound and incubated at room temperature for 60 min. Matching control wells excluding CRBN-DDB1 were used to correct for background fluorescence. Plates were read on an Envision plate reader with appropriate FP filter sets. The corrected S (perpendicular) and P (parallel) values were used to calculate fluorescence polarization (FP) with the following equation: FP=1000x(S−GxP)/(S+GxP).
- Fluorescence Polarization (FP) Assay Measuring compound ligand binding to CRBN-DDB1 was carried out using an established sensitive and quantitative in vitro fluorescence polarization (FP) based binding assay. (See, I. J. Enyedy et al, J. Med. Chem., 44: 313-4324, 2001). Compounds were dispensed from serially diluted DMSO stock into black 384-well compatible fluorescence polarization plates using an Echo acoustic dispenser. Compound binding to CRBN-DDB1 was measured by displacement of either a (−)-Thalidomide-Alexa Fluor or Pomalidomide-fluorescein conjugated probe dye. A 20 μL mixture containing 400 nM CRBN-DDB1 and 5 nM probe dye in 50 mM Hepes, pH 7.4, 200 mM NaCl, 1% DMSO and 0.05% pluronic acid-127 acid was added to wells containing compound and incubated at room temperature for 60 min. Matching control wells excluding CRBN-DDB1 were used to correct for background fluorescence. Plates were read on an Envision plate reader with appropriate FP filter sets. The corrected S (perpendicular) and P (parallel) values were used to calculate fluorescence polarization (FP) with the following equation:FP=1000*(S−G*P)/(S+G*P).
- Fluorescence Polarization (FP) Assay Measuring compound ligand binding to CRBN-DDB1 was carried out using an established sensitive and quantitative in vitro fluorescence polarization (FP) based binding assay. (See, I. J. Enyedy et al, J. Med. Chem., 44: 313-4324 [2001]). Compounds were dispensed from serially diluted DMSO stock into black 384-well compatible fluorescence polarization plates using an Echo acoustic dispenser. Compound binding to CRBN-DDB1 was measured by displacement of either a (−)-Thalidomide-Alexa Fluor or Pomalidomide-fluorescein conjugated probe dye. A 20 μL mixture containing 400 nM CRBN-DDB 1 and 5 nM probe dye in 50 mM Hepes, pH 7.4, 200 mM NaCl, 1% DMSO and 0.1% pluronic acid-127 acid was added to wells containing compound and incubated at room temperature for 60 min. Matching control wells excluding CRBN-DDB1 were used to correct for background fluorescence. Plates were read on an Envision plate reader with appropriate FP filter sets. The corrected S (perpendicular) and P (parallel) values were used to calculate fluorescence polarization (FP) with the following equation: FP=1000*(S−G*P)/(S+G*P). The fractional amount of bound probe (FB) to CRBN-DDB1 as a function of compound concentration was fitted according to Wang; FEBS Letters 360, (1995), 111-114 to obtain fits for parameter offsets and binding constant (KA) of competitor compound.