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.
Heart, gut, kidney, liver and placenta.