EC Explorer
[browse EC tree] - [search]
EC 1.3.99.5 Details
EC number
1.3.99.5
Accepted name
3-oxo-5α-steroid 4-dehydrogenase (acceptor)
Reaction
a 3-oxo-5α-steroid + acceptor = a 3-oxo-Δ4-steroid + reduced acceptor
Other name(s)
steroid 5α-reductase,
3-oxosteroid Δ4-dehydrogenase,
3-oxo-5α-steroid Δ4-dehydrogenase,
steroid Δ4-5α-reductase,
Δ4-3-keto steroid 5α-reductase,
Δ4-3-oxo steroid reductase,
Δ4-3-ketosteroid5α-oxidoreductase,
Δ4-3-oxosteroid-5α-reductase,
3-keto-Δ4-steroid-5α-reductase,
5α-reductase,
testosterone 5α-reductase,
4-ene-3-ketosteroid-5α-oxidoreductase,
Δ4-5α-dehydrogenase,
3-oxo-5α-steroid:(acceptor) Δ4-oxidoreductase,
tesI (gene name)
Systematic name
3-oxo-5α-steroid:acceptor Δ4-oxidoreductase
CAS registry number
9036-43-5
Comment
A flavoprotein. This bacterial enzyme, characterized from Comamonas testosteroni, is involved in androsterone degradation. cf. EC 1.3.1.22, 3-oxo-5α-steroid 4-dehydrogenase (NADP+).
History
created 1965, modified 2012
EC Tree
1.3.99.9 created 1976, deleted 2002