Tags: Enzyme.
Protostadienol synthase (EC 5.4.99.32 PdsA (S)-23-epoxysqualene mutase [cyclizing (17Z)-protosta-17(20)24-dien-3beta-ol-forming]) is an enzyme with system name (3S)-23-epoxy-23-dihydrosqualene mutase (cyclizing (17Z)-protosta-17(20)24-dien-3beta-ol-forming). This enzyme catalyses the following chemical reaction (3S)-23-epoxy-23-dihydrosqualene (17Z)-protosta-17(20)24-dien-3beta-ol(17Z)-Protosta-17(20)24-dien-3beta-ol is a precursor of the steroidal antibiotic helvolic acid.