Enables several functions, including identical protein binding activity; monosaccharide binding activity; and protein N-acetylglucosaminyltransferase activity. Involved in several processes, including intracellular distribution of mitochondria; negative regulation of protein targeting to membrane; and regulation of protein phosphorylation. Located in several cellular components, including euchromatin; neuronal cell body; and zymogen granule. Part of protein N-acetylglucosaminyltransferase complex. Biomarker of congestive heart failure. Human ortholog(s) of this gene implicated in non-syndromic X-linked intellectual disability 106. Orthologous to human OGT (O-linked N-acetylglucosamine (GlcNAc) transferase). [provided by Alliance of Genome Resources, Apr 2022]