Cycloeucalenol cycloisomerase explained

cycloeucalenol cycloisomerase
Ec Number:	5.5.1.9
Cas Number:	60496-19-7
Go Code:	0047793

In enzymology, a cycloeucalenol cycloisomerase 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

• Heintz R, Benveniste P . 1974 . Plant sterol metabolism. Enzymatic cleavage of the 9beta, 19beta-cyclopropane ring of cyclopropyl sterols in bramble tissue cultures . J. Biol. Chem. . 249 . 4267 - 74 . 4369016 . 13 .
• Rahier A, Schmitt P, Benveniste P . 1982 . 7-oxo-24ξ(28)-dihydrocycloeucalenol, a potent inhibitor of plant sterol biosynthesis . . 21 . 1969 - 1974 . 10.1016/0031-9422(82)83024-0 . 8 .