HYDROXYCINNAMIC ACID-ESTERS ENHANCE PEROXIDASE-DEPENDENT OXIDATION OF3,4-DIHYDROXYPHENYLALANINE - DIFFERENCES IN THE ENHANCEMENT AMONG THEESTERS

Authors
TAKAHAMA U YOSHITAMA K
Citation
U. Takahama et K. Yoshitama, HYDROXYCINNAMIC ACID-ESTERS ENHANCE PEROXIDASE-DEPENDENT OXIDATION OF3,4-DIHYDROXYPHENYLALANINE - DIFFERENCES IN THE ENHANCEMENT AMONG THEESTERS, Journal of plant research, 111(1101), 1998, pp. 97-100
Citations number
15
Categorie Soggetti
Plant Sciences
Journal title
Journal of plant research → ACNP
ISSN journal
09189440
Volume
111
Issue
1101
Year of publication
1998
Pages
97 - 100
Database
ISI
SICI code
0918-9440(1998)111:1101<97:HAEPOO>2.0.ZU;2-S
Abstract
Horseradish peroxidase (HRP)-dependent oxidation of 3, 4-dihydroxyphen ylalanine (dopa) was studied to elucidate the mechanism of its oxidati on. The oxidation of dopa was enhanced by hydroxycinnamic acid esters and dopa suppressed HRP-dependent oxidation of the esters. These resul ts indicate that phenoxyl radicals of hydroxycinnamic acid esters that are formed at first, can oxidize dopa. Among hydroxycinnamic acid est ers used, affinity of the phenoxyl radicals for dopa was in order 4-co umaric > caffeic > ferulic acid ester radicals.