Adds a myristoyl group to the N-terminal glycine residue of certain cellular and viral proteins. Also able to mediate N-terminal lysine myristoylation of proteins: catalyzes myristoylation of ARF6 on both 'Gly-2' and 'Lys-3'. Lysine myristoylation is required to maintain ARF6 on membranes during the GTPase cycle.
Subcellular locations: Cytoplasm, Cytoplasm, Cytosol, Membrane
Copurifies with ribosomes.