NSC632839 是一种非选择性异肽酶抑制剂，可抑制USP2、USP7和SENP2，EC50分别为 45±4 μM、37±1 μM 和 9.8±1.8 μM。

NSC632839 is a nonselective isopeptidase inhibitor, which inhibits USP2 (EC50: 45±4 μM), USP7 (EC50: 37±1 μM), and SENP2 (EC50: 9.8±1.8 μM).

NSC 632839 inhibits ubiquitin isopeptidases as illustrated by its ability to inhibit z-LRGG-AMC cleavage by crude lysates in the mid-micromolar range. NSC 632839 (1.2-150 μM) does not inhibit the PLA2, indicating that the inhibition for isopeptidases is selective.

In a 96-well-plate, 40 nM USP2, 40 nM USP7, or 20 nM SENP2 is preincubated with a concentration range of NSC 632839 (NCI/NIH developmental therapeutics program) or control for 30 min before supplementation with an equal volume of 60 nM Ub-PLA2/40 μM NBD C6-HPC (USP2 or 7) or 20 nM SUMO3-PLA2/40 μM NBD C6-HPC (SENP2). Relative activity of the enzymes is determined by measuring the RFU values at single time points within the initial linear range (USP, 50 min; USP7, 50 min; and SENP2, 30 min). The RFU values within the initial linear range are normalized such that isopeptidase+vehicle=0% inhibition and isopeptidase+NEM=100% inhibition. The EC50 values are determined as above. The inhibitory activity of the test compound against the reporter enzyme PLA2 is performed as described above except there is no preincubation step and the data are normalized such that free PLA2+vehicle=0% inhibition and free PLA2+EDTA=100% inhibition. PLA2 activity is determined 8 min after the addition of the reagents[1].

157654-67-6

C21H22ClNO

339.86

F6;Ubiquitin Isopeptidase Inhibitor II

DMSO:6.2 mg/mL
Powder: -20°C for 3 years
In solvent: -80°C for 2 years