An inhibitor of protein prenylation. Cysmethynil is a potent inhibitor of isoprenylcysteine carboxyl methyltransferase (ICMT) with antitumor activity in cancer cells. Cysmethynil treatment results in inhibition of cell growth in an Icmt-dependent fashion, demonstrating mechanism-based activity of the compound. Treatment of cancer cells with cysmethynil results in mislocalization of Ras and impaired epidermal growth factor signaling. In a human colon cancer cell line, cysmethynil treatment blocks anchorage-independent growth, and this effect is reversed by overexpression of Icmt. A cell-permeable indole acetamide that acts as a substrate-competitive and AdoMet-noncompetitive Icmt (isoprenylcysteine carboxyl methyltransferase) inhibitor (Ki=0.02uM, IC50=0.29uM, Substrate=S-farnesyl-L-cysteine), exhibiting no activity against FTase, gernaylgeranyltransferase type I, CaaX protease Rce1, AdoMet-dependent DNA methyltransferase, SssI DNA methyltransferase, or PCMT1 protein methyltransferase. Cysmethynil (25uM) induces G1 cell cycle-arrest and autophagy-mediated, but not apoptotic, cell death in prostate cancer PC3 cells with concomitant PI 3-K/Akt and mTOR signaling blockage, consistent with inhibition of Icmt-mediated activation of Ras and Rheb GTPases. Murine PC3 xenograft studies reveal limited in vivo efficacy. Synonyms: Cysmethynil, 2-(5-(3-Methylphenyl)-1-octyl-1H-indol-3-yl)acetamide, 2-(1-Octyl-5-m-tolyl-1H-indol-3-yl) acetamide, Isoprenylcysteine Carboxyl Methyltransferase Inhibitor) CAS No: 851636-83-4 Molecular Formula: C25H32N2O Molecular Weight: 376.5 Purity (HPLC): 98% Appearance: White to off-white solid Solubility: DMSO (100mg/ml) Storage and Stability: Lyophilized powder may be stored at -20C. Stable for 12 months at -20C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at -20C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Molekulargewicht:
376.5
CAS Nummer:
[851636-83-4]
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