Enables acetylglucosaminyltransferase activity. Acts upstream of or within protein N-linked glycosylation. Predicted to be located in Golgi apparatus and membrane. Predicted to be integral component of membrane. Predicted to be active in Golgi stack; endoplasmic reticulum; and endoplasmic reticulum-Golgi intermediate compartment. Is expressed in several structures, including adrenal gland; nervous system; nose; respiratory system; and urinary system. Orthologous to human MGAT4B (alpha-1,3-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase B). [provided by Alliance of Genome Resources, Apr 2022]