Cycloeucalenol cycloisomerase

{{infobox enzyme

| Name = cycloeucalenol cycloisomerase

| EC_number = 5.5.1.9

| CAS_number = 60496-19-7

| GO_code = 0047793

| image =

| width =

| caption =

}}

In enzymology, a cycloeucalenol cycloisomerase ({{EnzExplorer|5.5.1.9}}) is an enzyme that catalyzes the chemical reaction

:cycloeucalenol $\rightleftharpoons$ obtusifoliol

Hence, this enzyme has one substrate, cycloeucalenol, and one product, obtusifoliol.

This enzyme belongs to the family of isomerases, specifically the class of intramolecular lyases. The systematic name of this enzyme class is cycloeucalenol lyase (cyclopropane-decyclizing). This enzyme is also called cycloeucalenol---obtusifoliol isomerase. This enzyme participates in biosynthesis of steroids.

References

{{cite journal | vauthors = Heintz R, Benveniste P | date = 1974 | title = Plant sterol metabolism. Enzymatic cleavage of the 9beta, 19beta-cyclopropane ring of cyclopropyl sterols in bramble tissue cultures | journal = J. Biol. Chem. | volume = 249 | pages = 4267–74 | pmid = 4369016 | issue = 13 }}
{{cite journal | vauthors = Rahier A, Schmitt P, Benveniste P | date = 1982 | title = 7-oxo-24ξ(28)-dihydrocycloeucalenol, a potent inhibitor of plant sterol biosynthesis | journal = Phytochemistry | volume = 21 | pages = 1969–1974 | doi = 10.1016/0031-9422(82)83024-0 | issue = 8 }}

Category:EC 5.5.1

Category:Enzymes of unknown structure