Family members include alpha-(1->3)-arabinofuranosyltransferase (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 [1].

1: AftD, a novel essential arabinofuranosyltransferase from mycobacteria. Skovierova H, Larrouy-Maumus G, Zhang J, Kaur D, Barilone N, Kordulakova J, Gilleron M, Guadagnini S, Belanova M, Prevost MC, Gicquel B, Puzo G, Chatterjee D, Brennan PJ, Nigou J, Jackson M; Glycobiology. 2009;19:1235-1247. PMID:19654261