ML-323 Chemical Properties

Boiling point:

515.4±60.0 °C(Predicted)

Density 

1.20±0.1 g/cm3(Predicted)

storage temp. 

-20°C

solubility 

Soluble in DMSO (up to 40 mg/ml), or in Ethanol (up to 20 mg/ml)

form 

solid

pka

5.37±0.10(Predicted)

color 

White

Stability:

Stable for 1 year from date of purchase as supplied. Solutions in DMSO or ethanol may be stored at -20°C for up to 3 months.

Safety Information

HS Code 

29299090

ML-323 Usage And Synthesis

Description

ML323 (1571424-83-5) is a potent and reversible USP1-UAF1 deubiquitinase complex inhibitor with excellent selectivity against human DUBs, deSUMOylase, deneddylase and unrelated proteases, IC50=76 nM in a ubiquitin-rhodamine 110 assay.1 In H1299 non-small cell lung cancer cells treatment with ML323 dose dependently and robustly increased levels of monoubiquitinated PCNA compared to untreated cells at concentrations as low as 1 μM.1 It potentiates cisplatin cytotoxicity in non-small cell lung cancer and osteosarcoma cells.2? ML323 inhibition of upregulated USP1 in BRCA1-deficient tumor cells results in replication fork destabilization and decreased viability.3

Uses

ML323 is a highly potent and selective USP1-UAF1 inhibitor.

in vitro

studies in h596 cells showed that ml-323 blocked the deubiquitination of pcna and fancd2 via suppressing usp1–uaf1 activity. it was reported that ml-323 potently inhibited usp1-uaf1 with ic50 values of 76 nm and 174 nm in ubiquitin-rhodamine (ub-rho) assay and orthogonal gel-based assay, respectively. in addition, by targeting tls and fa, two major dna damage response pathways, ml-323 increased cisplatin cytotoxicity both in nsclc h596 cells and u2os osteosarcoma cells. moreover, this agent exhibited a high selectivity to human dubs, desumoylase, deneddylase and unrelated proteases. [1]

target

USP1-UAF1

IC 50

ml-323 is a highly potent and selective inhibitor of usp1-uaf1 with ic50 value of 76 nm.

storage

Store at -20°C

References

[1] THOMAS S. DEXHEIMER. Synthesis and Structure–Activity Relationship Studies of N-Benzyl-2-phenylpyrimidin-4-amine Derivatives as Potent USP1/UAF1 Deubiquitinase Inhibitors with Anticancer Activity against Nonsmall Cell Lung Cancer[J]. Journal of Medicinal Chemistry, 2014, 57 19: 8099-8110. DOI:10.1021/jm5010495
[2] QIN LIANG. A selective USP1–UAF1 inhibitor links deubiquitination to DNA damage responses[J]. Nature chemical biology, 2014, 10 4: 298-304. DOI:10.1038/nchembio.1455
[3] KAH SUAN LIM. USP1 Is Required for Replication Fork Protection in BRCA1-Deficient Tumors.[J]. Molecular Cell, 2018, 72 6: 925-941.e4. DOI:10.1016/j.molcel.2018.10.045

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