Function
Polyphenol oxidase active form, chloroplastic: Catalyzes the oxidation of mono- and o-diphenols to o-diquinones. Uses preferentially 4-methylcatechol and chlorogenic acid as substrates, followed by caffeic acid, pyrogallol, and catechol, but barely active toward dopamine and L-dopa. No activity detected with monophenols (e.g. phenol and tyramine).
Sequence
MATAPSPTTMGTYSSLISTNSFSTFLPNKSQLSLSGKSKHYVARRSSISCKATNNNNSNNQNEQQEESSRLLGKLDRRNILIGLGGLYGATTLDRKPFAFADPIAPPDLTTCKPAEITPGGSETVPCCPPVTTKIKTFKPDLSIPLRTSPAAHQVTDEYLAKFKKAQAAMRALPDDDPRSMVQQAKVHCAYCNGAYPQVGFTDNDIQVHFSWLFFPFHRMYLYFYERILGKLIDDPTFALPYWNWDSPVGFPIPDIYTDTSSPLYDQYRNADHQPPVLVDLSYGGKDDDVDEQTRIDENLAIMYRQMVSGAKTPDLFFGHAYRAGNLNTGKYPGTIENMPHNNIHIWVGDPSQTHQEDMGNFYSAGRDPLFYAHHANVDRMWNIWKTLGGKRKDITDTDWLDAEFLFYDENAELVRVKVRDSLEPEKQLRYNYEPVSLPWLFTKPTARKTKNKTKAKVAATQLTSKFPATLVEVTTVEVARPKPRKRSKKEKVDEEELLIIKDIEFEGTEAVKFDVFINDDAESLSRRDKSEFAGSFVHVPQGKTTKAKTKTNLKLGITDLLEDLGAEDDSSVLVTLVPRVSNSPITIGGFKIEYSS