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EC 1.1.1.304 Details
EC number
1.1.1.304
Accepted name
diacetyl reductase [(S)-acetoin forming]
Reaction
(S)-acetoin + NAD+ = diacetyl + NADH + H+
Other name(s)
(S)-acetoin dehydrogenase
Systematic name
(S)-acetoin:NAD+ oxidoreductase
Comment
The reaction is catalysed in the reverse direction. This activity is usually associated with butanediol dehydrogenase activity (EC 1.1.1.4 or EC 1.1.1.76). While the butanediol dehydrogenase activity is reversible, diacetyl reductase activity is irreversible. This enzyme has been reported in the bacteria Geobacillus stearothermophilus, Enterobacter aerogenes and Klebsiella pneumoniae [1-3]. Different from EC 1.1.1.303, diacetyl reductase [(R)-acetoin forming].
History
created 2010 (EC 1.1.1.5 created 1961, modified 1976, part incorporated 2010)
EC Tree
3.1.1.9 created 1961, deleted 1972
3.1.1.12 created 1961, deleted 1972
3.1.1.16 created 1961, deleted 1972
3.1.1.18 created 1961, deleted 1982
3.1.1.62 created 1989, deleted 1992
3.1.1.69 created 1992, deleted 2002