GGTI 298 (trifluoroacetate salt)

GGTI 298 (trifluoroacetate salt) (CAS No.: 1217457-86-7) is a CAAZ peptidomimetic inhibitor of geranylgeranyltransferase I (GGTase I), a key enzyme responsible for the post-translational geranylgeranylation of small GTP-binding proteins that regulate membrane localization and signaling activity. This compound selectively inhibits the prenylation of Rap1A, a member of the Ras superfamily involved in cell adhesion, proliferation, and intracellular signaling, with inhibitory activity in the low micromolar range (IC50 approximately 3 μM), while exhibiting substantially weaker effects on Ha-Ras prenylation, indicating a degree of target specificity among prenylated proteins. By blocking geranylgeranylation, GGTI 298 disrupts the proper membrane association and function of target GTPases, thereby modulating downstream signaling pathways relevant to cytoskeletal organization, cell cycle progression, and oncogenic transformation. As a result, it is widely utilized as a biochemical tool in studies of protein prenylation, small GTPase-mediated signaling, and tumor biology, as well as in the investigation of therapeutic strategies targeting post-translational modification pathways. Experimental applications typically involve in vitro cell-based assays and mechanistic studies, with concentrations adjusted according to specific cellular contexts and research objectives.