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EC 5.5.1.1 Details
EC number
5.5.1.1
Accepted name
muconate cycloisomerase
Reaction
(+)-muconolactone = cis,cis-muconate
Other name(s)
muconate cycloisomerase I,
cis,cis-muconate-lactonizing enzyme,
cis,cis-muconate cycloisomerase,
muconate lactonizing enzyme,
4-carboxymethyl-4-hydroxyisocrotonolactone lyase (decyclizing),
CatB,
MCI,
2,5-dihydro-5-oxofuran-2-acetate lyase (decyclizing),
2,5-dihydro-5-oxofuran-2-acetate lyase (ring-opening)
Systematic name
(+)-muconolactone lyase (ring-opening)
CAS registry number
9023-72-7
Comment
Requires Mn2+. Also acts (in the reverse reaction) on 3-methyl-cis,cis-muconate and, very slowly, on cis,trans-muconate. Not identical with EC 5.5.1.7 (chloromuconate cycloisomerase) or EC 5.5.1.11 (dichloromuconate cycloisomerase).
History
created 1961
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