Regulates the macrophage function, by enhancing the resolution of inflammation and wound repair functions mediated by M2 macrophages. The regulation of macrophage function is, due at least in part, to its ability to inhibit glycolysis. May also play a role in trafficking of proteins via its interaction with UNC119 and UNC119B cargo adapters: may help the release of UNC119 and UNC119B cargo or the recycling of UNC119 and UNC119B. May play a role in ciliary membrane localization via its interaction with UNC119B and protein transport into photoreceptor cells. Interacts with UNC119 and UNC119B; interaction preferentially takes place when UNC119 and UNC119B are unliganded with myristoylated proteins. Localizes to the transition zone and proximal cilium in addition to being found throughout the cytoplasm. Highly expressed in photoreceptors. Belongs to the UNC119-binding protein family.