For research use only.

Catalog No.S7130

33 publications

PR-619 Chemical Structure

CAS No. 2645-32-1

PR-619 is a non-selective, reversible inhibitor of the deubiquitinylating enzymes (DUBs) with EC50 of 1-20 μM in a cell-free assay. PR-619 activates autophagy.

Selleck's PR-619 has been cited by 33 publications

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Choose Selective DUB Inhibitors

Biological Activity

Description PR-619 is a non-selective, reversible inhibitor of the deubiquitinylating enzymes (DUBs) with EC50 of 1-20 μM in a cell-free assay. PR-619 activates autophagy.
JOSD2 [1]
(Cell-free assay)
SENP6 core [1]
(Cell-free assay)
UCH-L3 [1]
(Cell-free assay)
USP4 [1]
(Cell-free assay)
USP8 [1]
(Cell-free assay)
1.17 μM(EC50) 2.37 μM(EC50) 2.95 μM(EC50) 3.93 μM(EC50) 4.90 μM(EC50)
In vitro

PR-619 is a cell-permeable pyridinamine class broad-spectrum DUB inhibitor whose known targets include ATXN3, BAP1, JOSD2, OTUD5, UCH-L1, UCH-L3, UCH-L5/UCH37, USP1, 2, 4, 5, 7, 8, 9X, 10, 14, 15, 16, 19, 20, 22, 24, 28, 47, 48, VCIP135, YOD1, as well as deISGylase PLpro, deNEDDylase DEN1, and deSUMOlyase SENP6. PR-619 are shown to increase overall protein polyubiquitination in HEK293T cells in a dose- and time-dependent manner (20 to 150 μM, 0.5 to 20 h). PR619 treatment results in upregulation of both K 48 - and K63-linked polyUb chains. PR-619 induces HCT116 cell death with EC50 values of 6.3 μM.[1]

Methods Test Index PMID
Western blot

PubMed: 30865895     

HeLa cells treated with vehicle or 2.5, 5, or 10 mM PR-619 for 8 h were analyzed by immunoblot (IB).



Kinase Assay:[1]
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Ub-PLA2 assay:

Recombinant enzymes in 20 mM Tris-HCl, pH 8.0, 2 mM CaCl2 and 2 mM β-mercaptoethanol (DUB assay buffer) are preincubated with single doses or dose ranges of PR-619 or P22077 for 30 minutes in a 96 well plate before the addition of Ub-PLA2 and NBD C6-HPC. The liberation of a fluorescent product within the linear range of the assay is monitored at room temperature using a fluorescence plate reader. Vehicle (2%(v/v) DMSO) and 10 mM N-ethylmaleimide are included as controls. Where ≥60% inhibition is observed, EC50 values are determined using a sigmoidal dose response equation.
Cell Research:[1]
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  • Cell lines: HCT116, HEK293T
  • Concentrations: 0.5-50 μM
  • Incubation Time: 72 h
  • Method: 72 h hours later, 0.2 mg/mL resazurin prepared in phosphate-buffered saline is added to each well and the cells are incubated for an additional 3-6 h. The fluorescence of the resazurin reduction product is measured using Ex=535 nm and Em=590 nm filters on a fluorimeter. The EC50 values are calculated in Prism.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 45 mg/mL (201.54 mM)
Water Insoluble
Ethanol Insoluble

* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.

Chemical Information

Molecular Weight 223.28


CAS No. 2645-32-1
Storage powder
in solvent
Synonyms N/A
Smiles C1=C(C(=NC(=C1SC#N)N)N)SC#N

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Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

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DUB Signaling Pathway Map

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID