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ICMT Inhibitor

The ICMT Inhibitor controls the biological activity of ICMT. This small molecule/inhibitor is primarily used for Cancer applications.

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Synonym(s):
ICMT Inhibitor, 2-(5-(3-Methylphenyl)-1-octyl-1H-indol-3-yl)acetamide, 2-(1-Octyl-5-m-tolyl-1H-indol-3-yl) acetamide, Cysmethynil, Cysmethynil, Isoprenylcysteine Carboxyl Methyltransferase Inhibitor
Empirical Formula (Hill Notation):
C25H32N20
Molecular Weight:
612.66

Quality Level

assay

≥95% (HPLC)

form

semisolid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

pale yellow

solubility

DMSO: 100 mg/mL

shipped in

ambient

storage temp.

−20°C

General description

A cell-permeable indole acetamide compound that inhibits Icmt (isoprenylcysteine carboxyl methyltransferase) activity in an acceptor substrate isoprenylated cysteine-competitive (Ki = 0.02 µM; IC50 = 0.29 and 2.1 µM, respectively, with or without inhibitor preincubation; Substrate = S-farnesyl-L-cysteine) and donor substrate AdoMet-noncompetitive manner, exhibiting no activity against FTase, gernaylgeranyltransferase type I, CaaX protease Rce1, AdoMet-dependent DNA methyltransferase, SssI DNA methyltransferase, or PCMT1 protein methyltransferase. Shown to inhibit the proliferation of non-cancer MEF cells (by 100% at 30 µM) and prevent anchorage-independent growth of colon cancer DKOB8 (by >90% at 20 µM) in a dose- and Icmt-dependent manner. Cysmethynil (25 µM) 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 (tumor volume on day 28 = 9- and 22-fold of day 0, respectively, with or without 200 mg/kg/i.p. q.o.d.).
A cell-permeable indole acetamide that acts as a substrate-competitive and AdoMet-noncompetitive Icmt (isoprenylcysteine carboxyl methyltransferase) inhibitor (Ki = 0.02 µM; IC50 = 0.29 µM; 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 (25 µM) 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.

Packaging

Packaged under inert gas

Warning

Toxicity: Regulatory Review (Z)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C).

Other Notes

Go, M.L., et al. 2010. J. Med. Chem.53, 6838; Wang, M., et al. 2008. J. Biol. Chem.283, 18678; Baron, R.A., et al. 2007. Biochemistry46, 554; Winter-Vann, A.M., et al. 2005. Proc. Natl. Acad. Sci. USA102, 4336.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable


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