Rhosin is an effective and specific RhoA subfamily Rho GTPases inhibitor, which specifically binds to RhoA to inhibit RhoA-GEF interaction (Kd: ~ 0.4 uM). Rhosin does not interact with Cdc42 or Rac1, nor the GEF, LARG. Rhosin causes cell apoptosis.
8-CPT-2Me-cAMP sodium is a sodium salt compound that selectively activates exchange proteins activated by cAMP (Epac). These Epac proteins are cAMP-sensitive guanine nucleotide exchange factors (GEFs) responsible for activating small GTPases Rap1 and Rap2. 8-CPT-2Me-cAMP sodium specifically activates Epac1 with an EC50 value of 2.2 μM, while showing no activation of PKA with an EC50 value greater than 10 μM [1]. Additionally, 8-CPT-2Me-cAMP sodium stimulates the Epac-mediated release of calcium ions (Ca2+) in vitro in pancreatic β-cells [2].
Guanosine 5’-diphosphate (GDP) is a purine nucleotide and biosynthetic precursor of guanosine 5’-triphosphate .1It has been used to study the conformations of GTPases.2GDP (100 μM) activates sulfonylurea receptor 2B (SUR2B) linked to the inward-rectifier potassium channel 6.1 (Kir6.1) in HEK293T cells in a patch-clamp assay.3 1.Berg, J.M., Tymoczko, J.L., and Stryer, L.Biochemistry(2002) 2.Vetter, I.R., and Wittinghofer, A.The guanine nucleotide-binding switch in three dimensionsScience294(5545)1299-1304(2001) 3.Yamada, M., Isomoto, S., Matsumoto, S., et al.Sulphonylurea receptor 2B and Kir6.1 form a sulphonylurea-sensitive but ATP-insensitive K+ channelJ. Physiol.499(Pt 3)715-720(1997)
Dynamin-related GTPase DRP1 partial inhibitor (IC50 = 1.2 μM). Selective for DRP1 over other dynamin-related GTPases, OPA1 and DYN1. Increases mitochondrial DNA levels in mfn1- knockout MEFs deficient in mitochondrial fusion. Mallat et al (2018) Discovery and characterization of selective small molecule inhibitors of the mammalian mitochondrial division dynamin, DRP1. Biochem.Biophys.Res.Commun. 499 556 PMID:29601815
Rac GTPase fragment is a peptide with the sequence H2N-Val-Phe-Asp-Glu-Ala-Ile-Arg-Ala-Val-OH, MW= 1019.15. Rac is a subfamily of the Rho family of GTPases, small signaling G proteins (more specifically a GTPase).