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EC 1.1.1.391 Details
EC number
1.1.1.391
Accepted name
3β-hydroxycholanate 3-dehydrogenase (NAD+)
Reaction
isolithocholate + NAD+ = 3-oxo-5β-cholan-24-oate + NADH + H+
Other name(s)
3β-hydroxysteroid dehydrogenase
Systematic name
isolithocholate:NAD+ 3-oxidoreductase
Comment
This bacterial enzyme is involved, along with EC 1.1.1.52, 3α-hydroxycholanate dehydrogenase (NAD+), or EC 1.1.1.392, 3α-hydroxycholanate dehydrogenase (NADP+), in the modification of secondary bile acids to form 3β-bile acids (also known as iso-bile acids). The enzyme catalyses the reaction in the reduction direction in vivo. Also acts on related 3-oxo bile acids. cf. EC 1.1.1.393, 3β-hydroxycholanate 3-dehydrogenase (NADP+).
History
created 2016
EC Tree
1.1.1.68 created 1965, deleted 1978 [transferred to EC 1.1.99.15, deleted 1980]
1.1.1.70 created 1965, deleted 1978
1.1.1.74 created 1972, deleted 1976
1.1.1.89 created 1972, deleted 1976
1.1.1.109 created 1972, deleted 1976
1.1.1.139 created 1972, deleted 1978
1.1.1.155 created 1976, deleted 2004
1.1.1.171 created 1978, deleted 1984
1.1.1.180 created 1983, deleted 1984
1.1.1.182 created 1983, deleted 1990
1.1.1.204 created 1972 as EC 1.2.1.37, transferred 1984 to EC 1.1.1.204, modified 1989, deleted 2004
1.1.1.242 created 1992, deleted 2001
1.1.1.249 provisional version created 1999, deleted 1999 (reinstated 2001 as EC 2.5.1.46)
1.1.1.253 created 1999, deleted 2003