Glycosyltransferase involved in the maintenance of the outermost surface of the fungal cell wall (PubMed:29020037). Likely functions in the synthesis of a currently unknown, potentially minor but widespread, extracellular or outer cell wall polysaccharide which plays a key role in facilitating many interactions between plants and fungi by enabling hyphal growth on solid matrices (PubMed:29020037). Severely impairs hyphal growth with filaments both shorter and growing in a sinusoidal manner (PubMed:29020037). Results in a dramatic loss of disease causing ability on wheat leaves (PubMed:29020037). Belongs to the GT2 glycosyltransferase family.