This domain is found at the N-terminal end of alpha-(1->3)- arabinofuranosyltransferase from Mycolicibacterium smegmatis (AftD, EC:2.4.2.47), which is involved in the biosynthesis of the arabinogalactan (AG) region of the mycolylarabinogalactan -peptidoglycan (mAGP) complex, an essential component of the mycobacterial cell wall. It catalyzes the addition of an arabinofuranosyl (Araf) residue from the sugar donor decaprenyl-phospho-arabinose (DPA) on the C-3 of an alpha-(1->5)-linked Araf from the arabinan backbone of AG. This domain shows mixed alpha/beta folds homologous to other solved GT-C glycosyltransferase structures.
Jiyao W et al.(2023). "The conserved domain database in 2023.",