Predicted to enable alpha-N-acetylneuraminate alpha-2,8-sialyltransferase activity and identical protein binding activity. Predicted to be involved in several processes, including ganglioside biosynthetic process; glycoprotein metabolic process; and protein sialylation. Predicted to be located in Golgi apparatus. Predicted to be integral component of membrane. Orthologous to human ST8SIA3 (ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 3). [provided by Alliance of Genome Resources, Apr 2022]