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Inhibition of protein N-myristoylation: a therapeutic protocol in developing anticancer agents.

N-myristoyltransferase (NMT) is an essential eukaryotic enzyme which catalyzes the transfer of the myristoyl group to the terminal glycine residue of a number of proteins including those involved in signal transduction and apoptotic pathways. Myristoylation is crucial for the cellular proliferation process and is required for the growth and development in a number of organisms including many human pathogens and viruses. Targeting the myristoylation process thus has emerged as a novel therapeutic strategy for anticancer drug design. The expression/activity of NMT is considerably elevated in a number of cancers originating in the colon, stomach, gallbladder, brain and breast and attenuation of NMT levels has been shown to induce apoptosis in cancerous cell lines and reduce tumor volume in murine xenograft models for cancer. A focus of current therapeutic interventions in novel cancer treatments is therefore directed at developing specific NMT inhibitors. The inhibition of the myristoyl lipidation process with respect to cancer drug development lies in the fact that many proteins involved in oncogenesis such as src and various kinases require myristoylation to perform their cellular functions. Inhibiting NMT functions to control malignancy is a novel approach in the area of anticancer drug design and there are rapidly expanding discoveries of synthetic NMT inhibitors as potential chemotherapeutic agents to be employed in the warfare against cancer. The current review focuses on developments of various chemical NMT inhibitors with potential roles as anticancer agents.