The Enzyme Database

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Accepted name: protostadienol synthase
Reaction: (3S)-2,3-epoxy-2,3-dihydrosqualene = (17Z)-protosta-17(20),24-dien-3β-ol
For diagram of cucurbitadienol, cycloartenol, lanosterol and prostadienol biosynthesis, click here
Other name(s): PdsA; (S)-2,3-epoxysqualene mutase [cyclizing, (17Z)-protosta-17(20),24-dien-3β-ol-forming]
Systematic name: (3S)-2,3-epoxy-2,3-dihydrosqualene mutase [cyclizing, (17Z)-protosta-17(20),24-dien-3β-ol-forming]
Comments: (17Z)-Protosta-17(20),24-dien-3β-ol is a precursor of the steroidal antibiotic helvolic acid.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Lodeiro, S., Xiong, Q., Wilson, W.K., Ivanova, Y., Smith, M.L., May, G.S. and Matsuda, S.P. Protostadienol biosynthesis and metabolism in the pathogenic fungus Aspergillus fumigatus. Org. Lett. 11 (2009) 1241–1244. [PMID: 19216560]
[EC created 2011]

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