PAP — Asparagus officinalis

Summary

A4U43_C03F19980, designated PAP, encodes a purple acid phosphatase on asparagus chromosome 3. The product belongs to the PPA-like and calcineurin-like phosphoesterase families and exhibits phosphoenolpyruvate phosphatase, acid phosphatase, and protein phosphatase activities, along with ferric iron, manganese, and zinc binding. The protein is associated with cellular response to phosphate starvation and protein synthesis, and localizes to the vacuolar lumen, plant-type cell wall, and extracellular space. Studies of related genes in other species link the family to broader hydrolase functions, though these associations are not yet established in asparagus.