OSC

Catalysis of the reaction: (S)-2,3-epoxysqualene = lanosterol. This is a cyclization reaction that forms the sterol nucleus.

(S)-2,3-epoxysqualene mutase (cyclizing, lanosterol-forming), 2,3-epoxysqualene lanosterol cyclase activity, 2,3-epoxysqualene--lanosterol cyclase activity, 2,3-epoxysqualene-lanosterol cyclase activity, 2,3-oxidosqualene sterol cyclase activity, 2,3-oxidosqualene-lanosterol cyclase activity, OSC, lanosterol 2,3-oxidosqualene cyclase activity, lanosterol synthase activity, oxidosqualene--lanosterol cyclase activity, oxidosqualene-lanosterol cyclase activity, oxidosqualene:lanosterol cyclase activity, squalene 2,3-epoxide:lanosterol cyclase activity, squalene epoxidase-cyclase activity, squalene-2,3-oxide-lanosterol cyclase activity