ZDHHC15 Inhibitors

Chemical inhibitors of ZDHHC15 include a range of compounds that target various aspects of the palmitoylation process and related cellular pathways. 2-Bromopalmitate is a direct inhibitor, which disrupts the palmitoylation process by binding to ZDHHC15 and blocking the enzyme's access to its substrate. This effectively shuts down the enzyme's ability to attach palmitate groups to target proteins. Palmostatin B, on the other hand, indirectly maintains substrate inhibition for ZDHHC15 by inhibiting depalmitoylating enzymes, which prevents the recycling of palmitoylated proteins and preserves them in their palmitoylated state, reducing the availability of free substrates for ZDHHC15. Cerulenin inhibits fatty acid synthase, leading to a depletion of fatty acid substrates necessary for ZDHHC15's palmitoylation function. Tunicamycin disrupts N-linked glycosylation, which can alter the membrane dynamics or localization of ZDHHC15, thereby hampering its functional activity. Brefeldin A affects ZDHHC15 by disrupting the Golgi structure, which is critical for the proper localization and function of ZDHHC15.

Further chemical inhibitors such as Curcumin and Betulinic Acid interfere with cell signaling pathways and lipid metabolism, respectively, which can reduce the availability of proteins and substrates necessary for ZDHHC15 to exhibit its enzyme activity. Manumycin A and Tipifarnib inhibit enzymes involved in the post-translational modification of proteins, namely Ras farnesyltransferase and farnesyltransferase, which can alter the repertoire of proteins available for ZDHHC15-mediated palmitoylation. ML348 and ML349 are selective inhibitors of acyl protein thioesterase 1 and 2, respectively, which act to increase the pool of palmitoylated proteins, effectively saturating ZDHHC15's substrates and indirectly inhibiting its activity. Lastly, PF-429242 targets S1P protease, which has downstream effects on lipid biosynthetic enzymes and thus on the substrate availability for ZDHHC15.