- 时间: 2008/1/30
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Catalog No: KC-4R001
Size: 1 mg
Physical Appearance: Off-white or yellow solid
Molecular Formula: C51H79NO13
Molecular Weight: 914.2
Purity: 98% (TLC: 10% MeOH/Methylene chloride; Rf = 0.51)
Solubility: Soluble in DMSO (25 mg/ml)
Storage: Store, as supplied, at –20°C for up to 1 year. Store solutions at -20°C for up to 3 months.
Background: Rapamycin is a bacterial macrolide with antifungal and immunosuppressant activities. Rapamycin forms a complex with the immunophilin FKBP12 which then inhibits the activity of FRAP/mTOR (TOR in yeast). Rapamycin treatment of cells leads to the dephosphorylation and inactivation of p70 S6 kinase. Rapamycin also leads to the dephosphorylation of 4E-BP1/PHAS1, thereby promoting its binding to and inactivation of eIF4E. This activity has been shown to be the basis for Rapamycin’s ability to block protein synthesis and to arrest cell cycle progression in the G1-phase. However, it has been suggested that Rapamycin’s inhibition of the G1/S transition may be the consequence of its effect on cyclin D1 mRNA and protein stability.
Description: Description: Rapamycin (FRAP/mTOR) is soluble in DMSO and methanol. For use with in vitro or cell based assays, it may be diluted into aqueous buffers to yield desired concentrations with final DMSO concentrations of ~0.1%. IC50 values for inhibitory activity against FRAP/mTOR are around 50 pM. Such inhibitory activity is seen in cultured cells stimulated with fetal calf serum or a variety of growth factors. For experiments with cultured cells, CST recommends pretreating with 10 nM of this inhibitor for one hour prior to stimulation.
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The pharmacological and toxicological properties of this product have not been fully investigated. Exercise caution in use and handling. This product must not be used in humans.