  4.2.3.B19 | (2Z,6E)-farnesyl diphosphate |
formation of seven bisabolyl-derived sesquiterpenes through the intermediacy of a common (7R)-beta-bisabolyl cation, (+)-2-epiprezizaene (44%) is the major product, (-)-alpha-cedrene (21.5%), (R)-(-)-beta-curcumene (15.5%), alpha-acoradiene (3.9%), 4-epi-alpha-acoradiene (1.3%), and equal amounts of alpha-bisabolol (1.8%) and epi-alpha-bisabolol (1.8%). The enzyme may be able to exploit the low natural levels (3-14%) of (2Z,6E)-farnesyl diphosphate generated by farnesyl diphosphate synthases to produce a different array of sesquiterpenes in vivo. If the concentration of (2E,2E)-farnesyl diphosphate is depleted by its diversion into biosynthesis of phytosterols, farnesylated proteins, or diterpenes, the enzyme would be capable of utilizing (2Z,6E)-farnesyl diphosphate in its place |
Nicotiana tabacum |
(-)-beta-curcumene + diphosphate |
- |
? |
| 4.2.3.B19 | (2Z,6E)-farnesyl diphosphate |
formation of seven bisabolyl-derived sesquiterpenes through the intermediacy of a common (7R)-beta-bisabolyl cation, (+)-2-epiprezizaene (44%) is the major product, (-)-alpha-cedrene (21.5%), (R)-(-)-beta-curcumene (15.5%), alpha-acoradiene (3.9%), 4-epi-alpha-acoradiene (1.3%), and equal amounts of alpha-bisabolol (1.8%) and epi-alpha-bisabolol (1.8%) |
Nicotiana tabacum |
(-)-beta-curcumene + diphosphate |
- |
? |
