Catalyzes the reversible formation of acyl-phosphate (acyl-PO(4)) from acyl-[acyl-carrier-protein] (acyl-ACP). This enzyme utilizes acyl-ACP as fatty acyl donor, but not acyl-CoA. It is active with both saturated and unsaturated acyl-ACP. a fatty acyl-[ACP] + phosphate = an acyl phosphate + holo-[ACP] hexadecanoyl-[ACP] + phosphate = hexadecanoyl phosphate + holo-[ACP] Magnesium ions lead to a slight increase in the catalytic activity. Lipid metabolism; phospholipid metabolism. Homodimer. Probably interacts with PlsY. Associated with the membrane possibly through PlsY. Belongs to the PlsX family.