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ENZYME entry: EC

Accepted Name
(-)-alpha-pinene synthase.
Alternative Name(s)
(-)-alpha-pinene cyclase.
(-)-alpha-pinene/(-)-camphene synthase.
Reaction catalysed
Geranyl-diphosphate <=> (-)-alpha-pinene + diphosphate
  • Cyclase II of Salvia officinalis (sage) gives about equal parts (-)- alpha-pinene, (-)-beta-pinene and (-)-camphene, plus traces of other monoterpenoids.
  • (3S)-Linalyl diphosphate can also be used by the enzyme in preference to (3R)-linalyl diphosphate.
  • The 4-pro-S-hydrogen of geranyl diphosphate is lost.
  • The enzyme from Abies grandis (grand fir) gives roughly equal parts (-)-alpha-pinene and (-)-beta-pinene.
  • However the clone ag11 gave 35% (-)-limonene, 24% (-)-alpha-pinene and 20% (-)-beta-phellandrene.
  • Synthase I from Pinus taeda (loblolly pine) produces (-)-alpha-pinene with traces of (-)-beta-pinene.
  • The enzyme from Picea sitchensis (Sika spruce) forms 70% (-)-alpha- pinene and 30% (-)-beta-pinene.
  • The recombinant PmeTPS1 enzyme from Pseudotsuga menziesii (Douglas fir) gave roughly equal proportions of (-)-alpha-pinene and (-)- camphene plus traces of other monoterpenoids.
  • See also EC, EC, EC and EC
  • Formerly EC, EC and EC 4.2.3.n7.
PRIAM enzyme-specific profiles4.2.3.119
KEGG Ligand Database for Enzyme Nomenclature4.2.3.119
IUBMB Enzyme Nomenclature4.2.3.119
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All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.2.3.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.2.-.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 4.-.-.-