Protein-arginine N-acetylglucosaminyltransferase effector that catalyzes the transfer of a single N-acetylglucosamine (GlcNAc) to a conserved arginine residue in the death domain of host proteins such as FADD: arginine GlcNAcylation prevents homotypic/heterotypic death domain interactions. Also acts on host proteins without a death domain: catalyzes arginine GlcNAcylation of host small Rab1 GTPase, thereby preventing GTPase activity and leading to impaired host vesicular protein transport. In contrast to Ssek1, not able to disrupt TNF signaling in infected cells 