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EC 1.1.1.105 Details
EC number
1.1.1.105
Accepted name
all-trans-retinol dehydrogenase (NAD+)
Reaction
all-trans-retinol—[cellular-retinol-binding-protein] + NAD+ = all-trans-retinal—[cellular-retinol-binding-protein] + NADH + H+
Other name(s)
retinol (vitamin A1) dehydrogenase, MDR, microsomal retinol dehydrogenase, retinol dehydrogenase (misleading), retinal reductase (ambiguous), retinene reductase, epidermal retinol dehydrogenase 2, SDR16C5 (gene name), RDH16 (gene name)
Systematic name
all-trans retinol:NAD+ oxidoreductase
CAS registry number
9033-53-8
Comment
The enzyme recognizes all-trans-retinol and all-trans-retinal as substrates and exhibits a strong preference for NAD+/NADH as cofactors. Recognizes the substrate both in free form and when bound to cellular-retinol-binding-protein (CRBP1), but has higher affinity for the bound form [2]. No activity with 11-cis-retinol or 11-cis-retinal (cf. EC 1.1.1.315, 11-cis retinol dehydrogenase). Also active with 3α-hydroxysteroids [2].
History
created 1972, modified 2011
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