منابع مشابه
Biosynthesis of monoterpenes. Stereochemistry of the enzymatic cyclization of geranyl pyrophosphate to (-)-endo-fenchol.
The conversion of geranyl pyrophosphate to (-)-endo-fenchol is considered to proceed by the initial isomerization of the substrate to (-)-(3R)-linalyl pyrophosphate and the subsequent cyclization of this bound intermediate. Incubation of (1R)-[2-14C,1-3H]- and (1S)-[2-14C,1-3H]geranyl pyrophosphate with a preparation of (-)-endo-fenchol cyclase (synthase) from common fennel (Foeniculum vulgare)...
متن کاملBiosynthesis of monoterpenes. Enantioselectivity in the enzymatic cyclization of (+)- and (-)-linalyl pyrophosphate to (+)- and (-)-bornyl pyrophosphate.
Enzymes from Salvia officinalis and Tanacetum vulgare leaf epidermis catalyze the conversion of the acyclic precursor geranyl pyrophosphate to the cyclic monoterpenes (+)- and (-)-bornyl pyrophosphate, respectively. The antipodal cyclizations are considered to proceed by the initial isomerization of the substrate to the respective bound tertiary allylic intermediates (-)-(3R)- and (+)-(3S)-lina...
متن کاملBiosynthesis of monoterpenes. Enantioselectivity in the enzymatic cyclization of linalyl pyrophosphate to (-)-endo-fenchol.
The conversion of geranyl pyrophosphate to (-)-endo-fenchol is considered to proceed by the initial isomerization of the substrate to (-)-(3R)-linalyl pyrophosphate and the subsequent cyclization of this bound intermediate. To test this stereochemical scheme, phosphatase-free preparations of (-)-endo-fenchol cyclase from fennel (Foeniculum vulgare M.) fruit were repeatedly incubated with a samp...
متن کاملHost-Tree Monoterpenes and Biosynthesis of Aggregation Pheromones in the Bark Beetle Ips paraconfusus
A paradigm developed in the 1970s that Ips bark beetles biosynthesize their aggregation pheromone components ipsenol and ipsdienol by hydroxylating myrcene, a host tree monoterpene. Similarly, host α-pinene was hydroxylated to a third pheromone component cis-verbenol. In 1990, however, we reported that amounts of ipsenol and ipsdienol produced by male Ips paraconfusus (Coleoptera: Scolytinae) f...
متن کاملMonoterpenes of Salvia leucophylla
The " Salvia phenomenon" is one of the most famous examples of allelopathic interaction between higher plants. The Salvia thickets are surrounded by zones of bare soil ("bare zone", 1-3 m in width), which merge into areas of inhibited grassland ("zone of inhibition") and finally undisturbed grassland at a distance of 3-9 m. This characteristic vegetation pattern was attributed to monoterpenes, ...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1989
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)84827-5