Lipidated Stapled Peptides Targeting the Acyl Binding Protein UNC119.

The acyl-binding UNC119 proteins mediate the activation and transport of various N-myristoylated proteins. In particular, UNC119a plays a crucial role in the completion of cytokinesis. Herein, we report the use of a lipidated peptide originating from the UNC119 binding partner Gnat1 as the basis for the design of lipidated, stabilized α-helical peptides that target UNC119a. By using the hydrocarbon peptide-stapling approach, cell-permeable binders of UNC119a were generated that induced the accumulation of cytokinetic and binucleated cells; this suggests UNC119a as a potential target for the inhibition of cytokinesis.