O-acyltransferase that catalyzes D-alanylation of both teichoic acid and lipoteichoic acid (LTA) (PubMed:30283133). D-alanylation of LTA plays an important role in modulating the properties of the cell wall in Gram-positive bacteria, influencing the net charge of the cell wall (PubMed:30283133). Catalyzes D-alanylation from DltC carrier protein (PubMed:30283133). Cell wall biogenesis; lipoteichoic acid biosynthesis. Consists of a ring of transmembrane domains, which shield a highly conserved extracellular structural funnel extending into the middle of the lipid bilayer (PubMed:30283133). The conserved catalytic His residue is located at the bottom of this funnel and is connected to the intracellular DltC through a narrow tunnel (PubMed:30283133). Belongs to the membrane-bound acyltransferase family.