Beta-phellandrene synthase (neryl-diphosphate-cyclizing)

{{Short description|Enzyme}}

{{Infobox enzyme

| Name = β-phellandrene synthase (neryl-diphosphate-cyclizing)

| EC_number = 4.2.3.51

| CAS_number =

| GO_code =

| image =

| width =

| caption =

}}

β-Phellandrene synthase (neryl-diphosphate-cyclizing) (EC 4.2.3.51, phellandrene synthase 1, PHS1, monoterpene synthase PHS1) is an enzyme with systematic name neryl-diphosphate diphosphate-lyase (cyclizing; beta-phellandrene-forming).{{cite journal | vauthors = Schilmiller AL, Schauvinhold I, Larson M, Xu R, Charbonneau AL, Schmidt A, Wilkerson C, Last RL, Pichersky E | title = Monoterpenes in the glandular trichomes of tomato are synthesized from a neryl diphosphate precursor rather than geranyl diphosphate | journal = Proceedings of the National Academy of Sciences of the United States of America | volume = 106 | issue = 26 | pages = 10865–70 | date = June 2009 | pmid = 19487664 | pmc = 2705607 | doi = 10.1073/pnas.0904113106 | doi-access = free }} This enzyme catalyses the following chemical reaction

: neryl diphosphate $\backslash rightleftharpoons$ β-phellandrene + diphosphate

The enzyme from Solanum lycopersicum has very poor affinity with geranyl diphosphate.