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GSK4418959 (IDE275) is a non-covalent, reversible, selective, and orally active inhibitor of the Werner syndrome helicase (WRN helicase). GSK4418959 inhibits both ATPase and DNA unwinding activities of WRN helicase in an ATP-competitive manner. GSK4418959 is a valuable chemical tool for the study of microsatellite instability-high (MSI-H) cancers, where WRN helicase plays an essential role in maintaining genomic stability.

| Pack Size | Price | USA Warehouse | Global Warehouse | Quantity |
|---|---|---|---|---|
| 1 mg | $372 | In Stock | In Stock | |
| 5 mg | $892 | In Stock | In Stock | |
| 10 mg | $1,320 | In Stock | In Stock | |
| 25 mg | $2,480 | - | In Stock | |
| 50 mg | $3,790 | - | In Stock | |
| 1 mL x 10 mM (in DMSO) | $1,290 | - | In Stock |
| Description | GSK4418959 (IDE275) is a non-covalent, reversible, selective, and orally active inhibitor of the Werner syndrome helicase (WRN helicase). GSK4418959 inhibits both ATPase and DNA unwinding activities of WRN helicase in an ATP-competitive manner. GSK4418959 is a valuable chemical tool for the study of microsatellite instability-high (MSI-H) cancers, where WRN helicase plays an essential role in maintaining genomic stability. |
| In vivo | GSK4418959 (IDE275) induces tumor regression and activates DNA damage response (DDR) markers in several MSI-H CDX and PDX models across diverse tumor types, including CRC, endometrial, and gastric cancers with varying oncogenic drivers and tumor suppressor mutations, while sparing MSS models[1]. |
| Synonyms | IDE275, IDE 275, GSK 4418959 |
| Molecular Weight | 646.65 |
| Formula | C31H30F4N4O5S |
| Cas No. | 3064599-36-3 |
| Smiles | C(O)(=O)[C@@H]1[C@H](CCC[C@H]1C(NC2=C(F)C=C(C(F)(F)F)C=C2)=O)C3=CC=C(N(S(=O)(=O)C=4C=C5C(=CC4)N(C)C(C)=N5)C)C=C3 |
| Relative Density. | no data available |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. | |||||||||||||||||||||||||||||||||||
| Solubility Information | DMSO: 80 mg/mL (123.71 mM), Sonication is recommended. | |||||||||||||||||||||||||||||||||||
Solution Preparation Table | ||||||||||||||||||||||||||||||||||||
DMSO
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Dissolve 2 mg of the compound in 100 μL DMSO
to obtain a stock solution at a concentration of 20 mg/mL . If the required concentration exceeds the compound's known solubility, please contact us for technical support before proceeding.
1) Add 100 μL of the DMSO
stock solution to 400 μL PEG300
and mix thoroughly until the solution becomes clear.
2) Add 50 μL Tween 80 and mix well until fully clarified.
3) Add 450 μL Saline,PBS or ddH2O
and mix thoroughly until a homogeneous solution is obtained.
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