Prosolanapyrone-III cycloisomerase

Prosolanapyrone-III cycloisomerase (, Sol5, SPS, solanapyrone synthase (bifunctional enzyme: prosolanapyrone II oxidase/prosolanapyrone III cyclosiomerase)) is an enzyme with systematic name prosolanapyrone-III:(-)-solanapyrone A isomerase. This enzyme catalyses the following chemical reaction


 * prosolanapyrone III $$\rightleftharpoons$$ (-)-solanapyrone A

The enzyme is involved in the biosynthesis of the phytotoxin solanapyrone in some fungi.