Cholesterol Catabolism (rings A, B and C)

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Part of bile acid biosynthesis

© IUBMB 2005


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For details of steroid nomenclature see the Nomenclature of steroids.


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bile acid biosynthesis
EC 1.1.1.52 3α-hydroxycholanate dehydrogenase
EC 1.1.1.145 3β-hydroxy-Δ5-steroid dehydrogenase
EC 1.1.1.181 cholest-5-ene-3β,7α-diol 3β-dehydrogenase
EC 1.1.3.6 cholesterol oxidase
EC 1.3.1.3 Δ4-3-oxosteroid 5β-reductase
EC 1.14.13.96 see EC 1.14.14.139
EC 1.14.14.139 5β-cholestane-3α,7α-diol 12α-hydroxylase
EC 1.14.14.23 cholesterol 7α-monooxygenase
EC 1.14.14.26 24-hydroxycholesterol 7α-monooxygenase
EC 1.14.14.29 25/26-hydroxycholesterol 7α-hydroxylase
EC 1.14.18.8 7α-hydroxycholest-4-en-3-one 12α-hydroxylase
EC 5.3.3.1 steroid Δ-isomerase