Home Metabolism Casein Kinase inhibitor D 4476 For research use only.

D 4476

D 4476 is a potent, selective, and cell-permeant CK1 (casein kinase 1) inhibitor with IC50 of 200 nM and 300 nM in a cell-free assay for CK1 from Schizosaccharomyces pombe and CK1δ, respectively. Also acts as an ALK5 inhibitor with IC50 of 500 nM.

D 4476 Chemical Structure

D 4476 Chemical Structure

CAS No. 301836-43-1

Purity & Quality Control

D 4476 Related Products

Cell Data

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
A375 cells Function assay 10-80 μM 48 h Inhibition of CK1-MDM2 complex in human A375 cells assessed as increase in p21 protein level at 10 to 80 uM after 48 hrs by immunoblotting analysis 24007918
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Biological Activity

Description D 4476 is a potent, selective, and cell-permeant CK1 (casein kinase 1) inhibitor with IC50 of 200 nM and 300 nM in a cell-free assay for CK1 from Schizosaccharomyces pombe and CK1δ, respectively. Also acts as an ALK5 inhibitor with IC50 of 500 nM.
Targets
CK1 from Schizosaccharomyces pombe [1] CK1δ [1] ALK5 [1]
200 nM 300 nM 500 nM
In vitro
In vitro D4476 (10 μM) effectively inhibits CK1 and ALK5 with the activities of about 7% and 22% versus control group, respectively. In H4IIE hepatoma cells, D4476 specifically inhibits the phosphorylation of endogenous forkhead box transcription factor O1a (FOXO1a) on Ser322 and Ser325, without affecting the phosphorylation of other sites.[1] D4476 induces cytotoxicity in ANBL6, INA6 and RPMI8226 lines; MM1S and U266 lines are less sensitive; and OPM1 line is totally resistant. High concentrations (50 μM) D4476 induced toxicity in all multiple myeloma (MM) lines. In MM cells, D4476 increases the protein levels of TP53, P27, and FADD, as well as the cell cycle progression and induction of apoptosis.[2] Treatment of leukemia stem cells (LSCs) with D4476 shows highly selective killing of LSCs over normal HSPCs.[3]
Kinase Assay CK1 kinase assay
All protein kinase assays (25 μL) are carried out at room temperature (21℃). Assays are performed for 40 min using a Biomek 2000 Laboratory Automation Workstation in a 96-well format. The concentrations of magnesium acetate and [γ-33P]ATP (800 cpm/pmol) in the assays are 10 mM and 0.1 mM, respectively. Assays are initiated with MgATP and stopped by the addition of 5 μL of 0.5 M orthophosphoric acid. Aliquots are then spotted on to P30 filtermats, washed four times in 75 mM phosphoric acid to remove ATP, once in methanol, then dried and counted for radioactivity. CK1 δ (5-20 m-units), diluted in 20 mM Hepes, pH 7.5, 0.15 M NaCl, 0.1 mM EGTA, 0.1% (v/v) Triton X-100, 5 mM dithiothreitol, 50% (v/v) glycerol, is assayed against the peptide RRKDLHDDEEDEAMSITA in an incubation containing 20 mM Hepes, pH 7.5, 0.15 M NaCl, 0.1 mM EDTA, 5 mM DTT, 0.1% (v/v) Triton X-100 and 0.5 mM substrate peptide.
Cell Research Cell lines MM cell lines including MM1S, RPMI8226, U266, MM1R, OPM1, OPM2, INA6, ANBL6, ANBL-6VR, LR5 and RPMI-DOX40 (DOX40) cells
Concentrations 50 μM
Incubation Time 72 h
Method MM cells are seeded in triplicate into 96-well plates in 100 μL culture media. D4476 is added to each well at concentrations of 0, 5, 10, 20, 30, 40, and 50 μM in another 100 μL culture media. Cell viability is measured with MTT at the 72 h drug exposure. Absorbance is measured at 570 nm with spectrophotometer.
Experimental Result Images Methods Biomarkers Images PMID
Western blot MDM2 / p53 / p21 / E2F-1 / pRB 19759023

Chemical Information & Solubility

Molecular Weight 398.41 Formula

C23H18N4O3
CAS No. 301836-43-1 SDF Download D 4476 SDF
Smiles C1COC2=C(O1)C=CC(=C2)C3=C(NC(=N3)C4=CC=C(C=C4)C(=O)N)C5=CC=CC=N5
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 79 mg/mL ( (198.28 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble


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In vivo
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Tech Support

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.

Handling Instructions

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