title: Biosynthesis of friedelane and quinonemethide triterpenoids is compartmentalized in Maytenus aquifolium and Salacia campestris.
abstract: Maytenus aquifolium (Celastraceae) and Salacia campestris (Hippocrateaceae) species accumulate friedelane and quinonemethide triterpenoids in their leaves and root bark, respectively. Enzymatic extracts obtained from leaves displayed cyclase activity with conversion of the substrate oxidosqualene to the triterpenes, 3beta-friedelanol and friedelin. In addition, administration of (+/-)5-(3)H mevalonolactone in leaves of M. aquifolium seedlings produced radio labelled friedelin in the leaves, twigs and stems, while the root bark accumulated labelled maytenin and pristimerin. These experiments indicated that the triterpenes once biosynthesized in the leaves are translocated to the root bark and further transformed to the antitumoral quinonemethide triterpenoids.
authors.affiliation: Instituto de Química, Universidade Estadual Paulista, Araraquara, SP, Brazil.
authors.forename: J
authors.initials: J
authors.lastname: Corsino
authors.forename: P R
authors.initials: PR
authors.lastname: de Carvalho
authors.forename: M J
authors.initials: MJ
authors.lastname: Kato
authors.forename: L R
authors.initials: LR
authors.lastname: Latorre
authors.forename: O M
authors.initials: OM
authors.lastname: Oliveira
authors.forename: A R
authors.initials: AR
authors.lastname: Araújo
authors.forename: V D
authors.initials: VD
authors.lastname: Bolzani
authors.forename: S C
authors.initials: SC
authors.lastname: França
authors.forename: A M
authors.initials: AM
authors.lastname: Pereira
authors.forename: M
authors.initials: M
authors.lastname: Furlan
mesh_terms: D002851:Chromatography, High Pressure Liquid; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D019685:Rosales / Q000378:metabolism*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C421804:3-friedelanol; D014315:Triterpenes; C421805:friedelane