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EC 4.2.3.115 Details
EC number
4.2.3.115
Accepted name
α-terpinene synthase
Reaction
geranyl diphosphate = α-terpinene + diphosphate
Systematic name
geranyl-diphosphate diphosphate-lyase (cyclizing, α-terpinene-forming)
Comment
The enzyme has been characterized from Dysphania ambrosioides (American wormseed). Requires Mg2+. Mn2+ is less effective. The enzyme will also use (3R)-linalyl diphosphate. The reaction involves a 1,2-hydride shift. The 1-pro-S hydrogen of geranyl diphosphate is lost.
History
created 2012
EC Tree
1.14.13.45 created 1992, deleted 2003