title: Prenylation and methylation reactions in phylloquinone (vitamin K1) synthesis in Capsicum annuum plastids.
abstract: The biosynthesis of phylloquinone (vitamin K1) was examined using Capsicum fruit chloroplasts and chromoplasts (apparently phylloquinone free). In both cases, the synthesis of phylloquinone from α-naphthoquinone, dihydro-α-naphthoquinone, 1,4-dihydroxy-2-naphthoic acid (as precursors of the ring moiety) and (S)-adenosyl-L-methionine was achieved. In the presence of phytylpyrophosphate, the biosynthesis of phylloquinone in both organelles is particularly enhanced when 1,4-dihydroxy-2-naphthoic acid is used.
authors.affiliation: Laboratoire de Régulations Métaboliques et Différenciation des Plastes, Tour 53, 2ème étage, Université Pierre et Marie Curie (Paris 6), 4 place Jussieu, F-75230, Paris Cédex 05, France.
authors.forename: J P
authors.initials: JP
authors.lastname: Gaudillière
authors.forename: A
authors.initials: A
authors.lastname: d'Harlingue
authors.forename: B
authors.initials: B
authors.lastname: Camara
authors.forename: R
authors.initials: R
authors.lastname: Monéger