This domain family is found in bacteria, and is typically between 430 and 441 amino acids in length. This family is the N terminal region of AftA. The enzyme catalyzes the addition of the first key arabinofuranosyl residue from the sugar donor beta-D-arabinofuranosyl-1-monophosphoryldecaprenol to the galactan domain of the cell wall, thus priming the galactan for further elaboration by the arabinofuranosyltransferases. The N terminal region has been predicted to span 11 transmembrane regions.
Jiyao W et al.(2023). "The conserved domain database in 2023.",