EC |
5.5.1.9 |
Accepted name: |
cycloeucalenol cycloisomerase |
Reaction: |
cycloeucalenol = obtusifoliol |
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For diagram of plant sterol biosynthesis, click here |
Other name(s): |
cycloeucalenol—obtusifoliol isomerase; cycloeucalenol lyase (cyclopropane-decyclizing) |
Systematic name: |
cycloeucalenol lyase (cyclopropane-ring opening) |
Comments: |
Opens the cyclopropane ring of a number of related 4α-methyl-9β-19-cyclosterols, but not those with a 4β-methyl group, with formation of an 8(9) double bond. Involved in the synthesis of plant sterols. |
Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 60496-19-7 |
References: |
1. |
Heintz, R. and Benveniste, P. Plant sterol metabolism. Enzymatic cleavage of the 9β,19β-cyclopropane ring of cyclopropyl sterols in bramble tissue cultures. J. Biol. Chem. 249 (1974) 4267–4274. [PMID: 4369016] |
2. |
Rahier, A., Schmitt, P. and Benveniste, P. 7-oxo-24ξ(28)-dihydrocycloeucalenol, a potent inhibitor of plant sterol biosynthesis. Phytochemistry 21 (1982) 1969–1974. |
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[EC 5.5.1.9 created 1986] |
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