Involved in the biosynthesis of decaprenylphosphoryl arabinose (DPA) a precursor for arabinan synthesis in mycobacterial cell wall biosynthesis. Could be involved in the dephosphorylation of decaprenylphosphoryl-5-phosphoribose (DPPR) to decaprenyl-phospho-ribose (DPR). Cell wall biogenesis; cell wall polysaccharide biosynthesis. Cells laking this gene show a reduced growth rate and deformation on the side. Cytoplasm is detached from the cell wall and possesses a discrepancy density compared to wild-type. The content of D-arabinofuran residues (Araf) is reduced significantly. Belongs to the PA-phosphatase related phosphoesterase family.