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EC 5.3.3.1 Details
EC number
5.3.3.1
Accepted name
steroid Δ-isomerase
Reaction
a 3-oxo-Δ5-steroid = a 3-oxo-Δ4-steroid
Other name(s)
hydroxysteroid isomerase,
steroid isomerase,
Δ5-ketosteroid isomerase,
Δ5(or Δ4)-3-keto steroid isomerase,
Δ5-steroid isomerase,
3-oxosteroid isomerase,
Δ5-3-keto steroid isomerase,
Δ5-3-oxosteroid isomerase
Systematic name
3-oxosteroid Δ5-Δ4-isomerase
CAS registry number
9031-36-1
Comment
This activity is catalysed by several distinct enzymes (cf. EC 1.1.3.6, cholesterol oxidase and EC 1.1.1.145, 3-hydroxy-5-steroid dehydrogenase).
History
created 1961
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