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EC 1.1.3.8 Details
EC number
1.1.3.8
Accepted name
L-gulonolactone oxidase
Reaction
L-gulono-1,4-lactone + O2 = L-ascorbate + H2O2 (overall reaction);;(1a) L-gulono-1,4-lactone + O2 = L-xylo-hex-2-ulono-1,4-lactone + H2O2;;(1b) L-xylo-hex-2-ulono-1,4-lactone = L-ascorbate (spontaneous)
Other name(s)
L-gulono-γ-lactone: O2 oxidoreductase, L-gulono-γ-lactone oxidase, L-gulono-γ-lactone:oxidoreductase, GLO
Systematic name
L-gulono-1,4-lactone:oxygen 3-oxidoreductase
CAS registry number
9028-78-8
Comment
A microsomal flavoprotein (FAD). The product spontaneously isomerizes to L-ascorbate. While most higher animals can synthesize asborbic acid, primates and guinea pigs cannot [3].
History
created 1965, modified 2001, modified 2006
EC Tree
1.1.3.1 created 1961, deleted 1984
1.1.3.22 created 1961 as EC 1.2.3.2, transferred 1984 to EC 1.1.3.22, modified 1989, deleted 2004
1.1.3.25 created 1986, deleted 2005
1.1.3.26 created 1989, deleted 2002
1.1.3.31 created 1992, deleted 2003
1.1.3.32 created 1999, deleted 2002
1.1.3.33 created 1999, deleted 2002
1.1.3.34 created 1999, deleted 2002
1.1.3.35 created 1999, deleted 2002
1.1.3.36 created 1999, deleted 2002