AS1 — Solanum tuberosum

Summary

PGSC0003DMG400022430 (AS1, StPPO) on potato chromosome 2 encodes a polyphenol oxidase with aureusidin synthase and catecholase activities (EC 1.10.3.1), containing a tyrosinase copper-binding domain and a TAT signal peptide. The enzyme is associated with copper and metal binding, and is linked to pigment biosynthesis, (+)-larreatricin metabolism, and (+)-3'-hydroxylarreatricin anabolism. It localises to the vacuolar lumen and chloroplast thylakoid lumen. Related genes in other species connect the family to chlorophyll content, though this association has not been established in potato. The gene is also related to the PPO family.