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  • 217708 - Cdc42/Rac1 GTPase Inhibitor, ML141 - Calbiochem

217708 Sigma-Aldrich

Cdc42/Rac1 GTPase Inhibitor, ML141 - Calbiochem

The Cdc42/Rac1 GTPase Inhibitor, ML141 controls the biological activity of Cdc42/Rac1 GTPase. This small molecule/inhibitor is primarily used for Membrane applications.

Synonym: CDC42 GTPase Inhibitor II, CDC42 Inhibitor II, Rac1 Inhibitor V, Rac1 GTPase Inhibitor II, CID2950007, (±)-4-(5-(4-Methoxyphenyl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl))-benzenesulfonamide, (±)-4-(4,5-Dihydro-5-(4-methoxyphenyl)-3-phenyl-1H-pyra, CDC42 GTPase Inhibitor II, CDC42 Inhibitor II, Rac1 Inhibitor V, Rac1 GTPase Inhibitor II, CID2950007, (±)-4-(5-(4-Methoxyphenyl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl))-benzenesulfonamide, (±)-4-(4,5-Dihydro-5-(4-methoxyphenyl)-3-phenyl-1H-pyraz, Cdc42/Rac1 GTPase Inhibitor, ML141 - Calbiochem

  • CAS Number 71203-35-5

  • Empirical Formula (Hill Notation) C22H21N3O3S

  • Molecular Weight 407.49

  •  MDL number MFCD05987165



Quality Level   100
assay   ≥99% (HPLC)
form   solid
mfr. no.   Calbiochem®
storage condition   OK to freeze
  protect from light
storage conditions   -20C
color   yellow-white
solubility   DMSO: 50 mg/mL
shipped in   ambient


General description

A cell-permeable, allosteric, trisubstituted dihydropyrazolyl compound that acts as a potent, selective, reversible and non-competitive inhibitor of Cdc42 GTPases (IC50 = 0.2, 2.6 and 5.4 µM against nucleotide depleted Cdc42-wt, Cdc42-wt and Cdc42 activated mutant, respectively) with excellent selectivity over Rho family GTPases (IC50 > 100 µM for Ras-wt, Ras activated mutant, Rab7-wt, Rab2a-wt, Rac1-wt and Rac1 activated mutant). Shown to efficiently block Cdc42 association with GTPγS and PAK-PBD, and decrease GTP-Cdc42 (> 95%) and GTP-Rac1 (≥40%) contents in EGF-stimulated 3T3 cells, and inhibit Bradykinin (Cat. No. 05-23-0500)-induced filopodia formation in 3T3 cells at 10 µM.


25 mg in Glass bottle

Packaged under inert gas


Toxicity: Standard Handling (A)


Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Hong, L., et al. 2012. J. Biol. Chem.in press.
Probe Reports from the NIH Molecular Libraries Program [Internet]. Bethesda (MD): National Center for Biotechnology Information (US); 2010-.2010 Feb 27. (http://www.ncbi.nlm.nih.gov/books/NBK51965/)

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