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Steroid hormone biosynthesis

State Icon Reaction EC-Number Confidence maximal confidence score from EnzymeDetector
17alpha-hydroxyprogesterone + 2 reduced_ferredoxin + O2 + 2 H+ <=> 21-deoxycortisol + 2 oxidized_ferredoxin + H2O 1.14.15.4 steroid 11beta-monooxygenase

testosterone + NADP+ <=> 4-androstene-3,17-dione + NADPH + H+ 1.1.1.146 11beta-hydroxysteroid dehydrogenase
1.1.1.148 estradiol 17alpha-dehydrogenase
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.2 alcohol dehydrogenase (NADP+)
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase
1.1.1.64 testosterone 17beta-dehydrogenase (NADP+)











5alpha-androstane-3alpha,17beta-diol + NADP+ <=> 5alpha-dihydrotestosterone + NADPH + H+ 1.1.1.105 all-trans-retinol dehydrogenase (NAD+)
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.2 alcohol dehydrogenase (NADP+)
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.270 3beta-hydroxysteroid 3-dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase
1.3.1.20 trans-1,2-dihydrobenzene-1,2-diol dehydrogenase










dehydroepiandrosterone + O2 + reduced_flavodoxin <=> 7alpha-hydroxydehydroepiandrosterone + flavin + H2O 1.14.14.23 cholesterol 7alpha-monooxygenase

17alpha,20alpha-dihydroxycholesterol + 2 O2 + 4 H+ + 4 reduced_ferredoxin <=> 17alpha-hydroxypregnenolone + 4-Methylpentanal + 3 H2O + 4 oxidized_ferredoxin 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)

Estrone_3-sulfate + H2O <=> estrone + sulfate + H+ 3.1.6.1 arylsulfatase
3.1.6.2 steryl-sulfatase
3.1.6.8 cerebroside-sulfatase



corticosterone + NAD+ <=> 11-Dehydrocorticosterone + NADH 1.1.1
1.1.1.B40


dehydroepiandrosterone + NAD+ <=> 4-androstene-3,17-dione + NADH + H+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
5.3.3.1 steroid Delta-isomerase



cortisol <=> 11beta-hydroxyandrost-4-ene-3,17-dione not assigned

3alpha,21-dihydroxy-5beta-pregnane-11,20-dione + NADP+ <=> 21-hydroxy-5beta-pregnane-3,11,20-trione + NADPH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

estrone + H+ + O2 + NADH <=> 2-hydroxyestrone + NAD+ + H2O 1.14.14.1 unspecific monooxygenase

testosterone + NAD+ <=> 4-androstene-3,17-dione + NADH + H+ 1.1.1.112 indanol dehydrogenase
1.1.1.210 3beta(or 20alpha)-hydroxysteroid dehydrogenase
1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase
1.1.1.64 testosterone 17beta-dehydrogenase (NADP+)







11beta-hydroxyprogesterone + reduced_flavodoxin + O2 <=> corticosterone + flavin + H2O 1.14.14.16 steroid 21-monooxygenase

progesterone + NADH <=> 20alpha-hydroxyprogesterone + NAD+ 1.1.1.149 20alpha-hydroxysteroid dehydrogenase
1.1.1.210 3beta(or 20alpha)-hydroxysteroid dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase






4-androstene-3,17-dione + reduced_flavodoxin + O2 <=> 7alpha-hydroxy-4-androstene-3,17-dione + flavin + H2O 1.14.14.1 unspecific monooxygenase

19-hydroxyandrost-4-ene-3,17-dione + O2 + reduced_flavodoxin <=> 19-oxoandrost-4-ene-3,17-dione + 2 H2O + flavin 1.14.14.14 aromatase

11-Dehydrocorticosterone + NADPH <=> corticosterone + NADP+ 1.1.1.146 11beta-hydroxysteroid dehydrogenase
1.1.1.B40


androst-4-ene-3,11,17-trione + NADPH <=> 11beta-hydroxyandrost-4-ene-3,17-dione + NADP+ 1.1.1.146 11beta-hydroxysteroid dehydrogenase

2-hydroxyestrone + S-adenosyl-L-methionine <=> 2-methoxyestrone + S-adenosyl-L-homocysteine 2.1.1.6 catechol O-methyltransferase

17alpha,21-Dihydroxypregnenolone + 2 reduced_ferredoxin + O2 + 2 H+ <=> 11beta,17alpha,21-Trihydroxypregnenolone + 2 oxidized_ferredoxin + H2O 1.14.15.4 steroid 11beta-monooxygenase

dehydroepiandrosterone_3-sulfate + H2O <=> dehydroepiandrosterone + sulfate + H+ 3.1.6.1 arylsulfatase
3.1.6.2 steryl-sulfatase
3.1.6.8 cerebroside-sulfatase



pregnenolone + reduced_flavodoxin + O2 <=> 21-hydroxypregnenolone + flavin + H2O 1.14.14.16 steroid 21-monooxygenase

(20R,22R)-20,22-dihydroxy-cholesterol + O2 + reduced_adrenodoxin + H+ <=> pregnenolone + 4-Methylpentanal + oxidized_ferredoxin + H2O 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)

Tetrahydrocorticosterone + NADP+ <=> 5beta-dihydrocorticosterone + NADPH + H+ 1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)


4-androstene-3,17-dione + reduced_ferredoxin + O2 <=> 11beta-hydroxyandrost-4-ene-3,17-dione + oxidized_ferredoxin + H2O 1.14.15.4 steroid 11beta-monooxygenase

17beta-estradiol + H+ + O2 + NADPH <=> 2-hydroxyestradiol + NADP+ + H2O 1.14.14.1 unspecific monooxygenase

17alpha-hydroxypregnenolone + NAD+ <=> 17alpha-hydroxyprogesterone + NADH + H+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
5.3.3.1 steroid Delta-isomerase


3alpha,11beta,21-trihydroxy-20-oxo-5beta-pregnan-18-al + NADP+ <=> 11beta,21-dihydroxy-3,20-oxo-5beta-pregnan-18-al + NADPH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

17alpha,20alpha-dihydroxypregn-4-en-3-one + NADP+ <=> 17alpha-hydroxyprogesterone + NADPH + H+ 1.1.1.149 20alpha-hydroxysteroid dehydrogenase
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase




pregnenolone + NADPH + H+ + O2 <=> 7alpha-hydroxypregnenolone + NADP+ + H2O 1.14.14.29 25/26-hydroxycholesterol 7alpha-hydroxylase

17beta-estradiol + H+ + O2 + NADPH <=> estriol + NADP+ + H2O 1.14.14.1 unspecific monooxygenase

11-Dehydrocorticosterone <=> 21-hydroxy-5beta-pregnane-3,11,20-trione not assigned

17alpha-hydroxypregnenolone + reduced_flavodoxin + O2 <=> dehydroepiandrosterone + acetate + flavin + H2O 1.14.14.32 17alpha-hydroxyprogesterone deacetylase

5beta-Pregnan-3alpha-ol-20-one + NADH + H+ <=> 5beta-pregnane-3alpha,20alpha-diol + NAD+ 1.1.1.112 indanol dehydrogenase
1.1.1.149 20alpha-hydroxysteroid dehydrogenase
1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase



androsterone + NADP+ <=> 5alpha-androstane-3,17-dione + NADPH + H+ 1.1.1.105 all-trans-retinol dehydrogenase (NAD+)
1.1.1.112 indanol dehydrogenase
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.2 alcohol dehydrogenase (NADP+)
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.21 aldose reductase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.3.1.20 trans-1,2-dihydrobenzene-1,2-diol dehydrogenase










2-hydroxyestradiol + S-adenosyl-L-methionine <=> 2-methoxyestradiol-17beta + S-adenosyl-L-homocysteine 2.1.1.6 catechol O-methyltransferase

cortolone + NAD+ <=> 3alpha,17alpha,21-trihydroxy-5beta-pregnan-11,20-dione + NADH + H+ 1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase

5alpha-pregnane-3alpha,20alpha-diol + NADP+ <=> 5alpha-pregnan-20alpha-ol-3-one + NADPH 1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)


5alpha-dihydrotestosterone + NADP+ <=> testosterone + H+ + NADPH 1.3.1.22 3-oxo-5alpha-steroid 4-dehydrogenase (NADP+)
1.3.99.5 3-oxo-5alpha-steroid 4-dehydrogenase (acceptor)


5beta-Pregnan-3alpha-ol-20-one + NAD+ <=> 5beta-pregnane-3,20-dione + NADH 1.1.1.112 indanol dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase





20alpha-hydroxycholesterol + O2 + 2 reduced_ferredoxin + 2 H+ <=> (20R,22R)-20,22-dihydroxy-cholesterol + H2O + 2 oxidized_ferredoxin 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)

progesterone + reduced_flavodoxin + O2 <=> 11-deoxycorticosterone + flavin + H2O 1.14.14.16 steroid 21-monooxygenase

16alpha-hydroxyandrost-4-ene-3,17-dione + H+ + NADH <=> 16alpha-hydroxy-dehydroepiandrosterone + NAD+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
5.3.3.1 steroid Delta-isomerase


11beta-hydroxytestosterone + NADP+ <=> 11beta-hydroxyandrost-4-ene-3,17-dione + NADPH + H+ 1.1.1.62 17beta-estradiol 17-dehydrogenase

cortol + NAD+ <=> tetrahydrocortisol + NADH + H+ 1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase

dehydroepiandrosterone + H+ + O2 + NADPH <=> 16alpha-hydroxy-dehydroepiandrosterone + NADP+ + H2O 1.14.13
1.14.14.1 unspecific monooxygenase


11beta-hydroxytestosterone + NAD+ <=> 11beta-hydroxyandrost-4-ene-3,17-dione + NADH 1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.62 17beta-estradiol 17-dehydrogenase


19-oxotestosterone + O2 + reduced_flavodoxin <=> 17beta-estradiol + formate + H2O + flavin 1.14.14.14 aromatase

cortisol + H+ + NADH <=> 11beta,17alpha,21-Trihydroxypregnenolone + NAD+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
5.3.3.1 steroid Delta-isomerase


pregnenolone + reduced_flavodoxin + O2 <=> 17alpha-hydroxypregnenolone + flavin + H2O 1.14.14.19 steroid 17alpha-monooxygenase
1.14.14.32 17alpha-hydroxyprogesterone deacetylase


17alpha-hydroxypregnenolone + reduced_flavodoxin + O2 <=> 17alpha,21-Dihydroxypregnenolone + flavin + H2O 1.14.14.16 steroid 21-monooxygenase

11-deoxycortisol + H+ + NADH <=> 17alpha,21-Dihydroxypregnenolone + NAD+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
5.3.3.1 steroid Delta-isomerase


3''-phosphoadenylyl-sulfate + pregnenolone <=> adenosine_3,5''-bisphosphate + pregnenolone_sulfate + H+ 2.8.2.14 bile-salt sulfotransferase
2.8.2.15 steroid sulfotransferase
2.8.2.2 alcohol sulfotransferase
2.8.2.4 estrone sulfotransferase




17beta-estradiol + NAD+ <=> estrone + NADH + H+ 1.1.1.210 3beta(or 20alpha)-hydroxysteroid dehydrogenase
1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.300 NADP-retinol dehydrogenase
1.1.1.35 3-hydroxyacyl-CoA dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase








17beta-estradiol + NADP+ <=> estrone + NADPH + H+ 1.1.1.184 carbonyl reductase (NADPH)
1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase
1.1.1.64 testosterone 17beta-dehydrogenase (NADP+)







4-androstene-3,17-dione + O2 + reduced_acceptor <=> testololactone + H2O + acceptor 1.14.99.12 androst-4-ene-3,17-dione monooxygenase

testosterone + O2 + reduced_flavodoxin <=> 19-hydroxytestosterone + H2O + flavin 1.14.14.14 aromatase

UDP-glucuronate + 2-methoxyestrone <=> UDP + 2-methoxyestrone_beta-D-glucuronide 2.4.1.17 glucuronosyltransferase

19-oxoandrost-4-ene-3,17-dione + O2 + reduced_flavodoxin <=> estrone + formate + H2O + flavin 1.14.14.14 aromatase

11-deoxycortisol + 2 reduced_ferredoxin + O2 + 2 H+ <=> cortisol + 2 oxidized_ferredoxin + H2O 1.14.15.4 steroid 11beta-monooxygenase

3alpha,17alpha,21-trihydroxy-5beta-pregnan-11,20-dione + NADP+ <=> 17alpha,21-dihydroxy-5beta-pregnane-3,11,20-trione + NADPH 1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)



21-deoxycortisol + flavin + H2O <=> 11beta-hydroxyprogesterone + reduced_flavodoxin + O2 1.14.14.19 steroid 17alpha-monooxygenase

5beta-pregnane-3,20-dione + NADP+ <=> progesterone + NADPH + H+ 1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.3.1.3 Delta4-3-oxosteroid 5beta-reductase
1.3.1.M16
1.3.99.6 3-oxo-5beta-steroid 4-dehydrogenase





7alpha,17beta-dihydroxyandrost-4-en-3-one + acceptor <=> 7alpha-hydroxy-4-androstene-3,17-dione + reduced_acceptor not assigned

pregnenolone + NAD+ <=> progesterone + NADH + H+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
5.3.3.1 steroid Delta-isomerase



cholesterol + O2 + reduced_adrenodoxin + H+ <=> (22R)-22-hydroxycholesterol + H2O + oxidized_ferredoxin 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)

5beta-Pregnan-3alpha-ol-20-one + NADP+ <=> 5beta-pregnane-3,20-dione + NADPH 1.1.1.112 indanol dehydrogenase
1.1.1.149 20alpha-hydroxysteroid dehydrogenase
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.3.1.20 trans-1,2-dihydrobenzene-1,2-diol dehydrogenase







progesterone + NADPH <=> 20alpha-hydroxyprogesterone + NADP+ 1.1.1.149 20alpha-hydroxysteroid dehydrogenase
1.1.1.189 prostaglandin-E2 9-reductase
1.1.1.210 3beta(or 20alpha)-hydroxysteroid dehydrogenase
1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.270 3beta-hydroxysteroid 3-dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase









11beta,21-dihydroxy-3,20-oxo-5beta-pregnan-18-al + NADP+ <=> aldosterone + NADPH + H+ 1.3.1.3 Delta4-3-oxosteroid 5beta-reductase

UDP-glucuronate + testosterone <=> UDP + epitestosterone_O-glucuronide 2.4.1.17 glucuronosyltransferase

5beta-androstane-3alpha-ol-17-one + UDP-glucuronate <=> UDP + etiocholanone_O-glucuronide 2.4.1.17 glucuronosyltransferase

estrone + H+ + O2 + NADPH <=> 16alpha-hydroxyestrone + NADP+ + H2O 1.14.13
1.14.14.1 unspecific monooxygenase


3''-phosphoadenylyl-sulfate + cholesterol <=> adenosine_3,5''-bisphosphate + Cholesterol_sulfate + H+ 2.8.2.14 bile-salt sulfotransferase
2.8.2.15 steroid sulfotransferase
2.8.2.2 alcohol sulfotransferase



aldosterone <=> aldosterone not assigned

cortisol + NAD+ <=> cortisone + NADH 1.1.1
1.1.1.146 11beta-hydroxysteroid dehydrogenase
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.B40




5beta-androstane-3alpha-ol-17-one + NAD+ <=> H+ + 5beta-androstane-3,17-dione + NADH 1.1.1.112 indanol dehydrogenase
1.1.1.152 3alpha-hydroxy-5beta-androstane-17-one 3alpha-dehydrogenase
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.210 3beta(or 20alpha)-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase








androsterone + UDP-glucuronate <=> Androsterone_glucuronide + UDP 2.4.1.17 glucuronosyltransferase

21-hydroxypregnenolone + NAD+ <=> 11-deoxycorticosterone + NADH + H+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
5.3.3.1 steroid Delta-isomerase


estriol + UDP-glucuronate <=> UDP + estriol-16_alpha-glucuronide 2.4.1.17 glucuronosyltransferase

3alpha,21-dihydroxy-5beta-pregnane-11,20-dione + NAD+ <=> 21-hydroxy-5beta-pregnane-3,11,20-trione + NADH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

17beta-estradiol + H+ + O2 + NADH <=> 2-hydroxyestradiol + NAD+ + H2O 1.14.14.1 unspecific monooxygenase

Tetrahydrocorticosterone + NADP+ <=> 3alpha,21-dihydroxy-5beta-pregnane-11,20-dione + NADPH + H+ 1.1.1.146 11beta-hydroxysteroid dehydrogenase

3''-Phosphoadenylyl_sulfate + 2-methoxyestrone <=> Adenosine_3'',5''-bisphosphate + 2-Methoxyestrone_3-sulfate 2.8.2.15 steroid sulfotransferase

3''-phosphoadenylyl-sulfate + dehydroepiandrosterone <=> adenosine_3,5''-bisphosphate + dehydroepiandrosterone_3-sulfate + H+ 2.8.2.1 aryl sulfotransferase
2.8.2.14 bile-salt sulfotransferase
2.8.2.15 steroid sulfotransferase
2.8.2.2 alcohol sulfotransferase
2.8.2.34 glycochenodeoxycholate sulfotransferase
2.8.2.4 estrone sulfotransferase






estriol + NADP+ <=> 16alpha-hydroxyestrone + NADPH + H+ 1.1.1.62 17beta-estradiol 17-dehydrogenase

3alpha,20alpha,21-trihydroxy-5beta-pregnan-11-one + NAD+ <=> 3alpha,21-dihydroxy-5beta-pregnane-11,20-dione + NADH + H+ 1.1.1.53 3alpha(or 20beta)-hydroxysteroid dehydrogenase

estriol + NAD+ <=> 16alpha-hydroxyestrone + NADH + H+ 1.1.1.62 17beta-estradiol 17-dehydrogenase

tetrahydrocortisol + NAD+ <=> 11beta,17alpha,21-trihydroxy-5beta-pregnane-3,20-dione + NADH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

androsterone + NAD+ <=> 5alpha-androstane-3,17-dione + NADH + H+ 1.1.1.105 all-trans-retinol dehydrogenase (NAD+)
1.1.1.112 indanol dehydrogenase
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.210 3beta(or 20alpha)-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.35 3-hydroxyacyl-CoA dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase










11-deoxycorticosterone + 2 reduced_ferredoxin + O2 + 2 H+ <=> corticosterone + 2 oxidized_ferredoxin + H2O 1.14.15.4 steroid 11beta-monooxygenase

5beta-androstane-3,17-dione + NADP+ <=> 4-androstene-3,17-dione + NADPH + H+ 1.3.1
1.3.1.3 Delta4-3-oxosteroid 5beta-reductase


3alpha,17alpha,21-trihydroxy-5beta-pregnan-11,20-dione + NAD+ <=> 17alpha,21-dihydroxy-5beta-pregnane-3,11,20-trione + NADH + H+ 1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)


2-methoxyestradiol-17beta + UDP-glucuronate <=> 2-Methoxy-estradiol-17beta_3-glucuronide + UDP 2.4.1.17 glucuronosyltransferase

5alpha-Pregnan-3alpha,21-diol-20-one + NADP+ <=> 5alpha-pregnane-21-ol-3,20-dione + NADPH 1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)


17beta-estradiol + UDP-glucuronate <=> beta-estradiol-3-glucuronide + UDP 2.4.1.17 glucuronosyltransferase

tetrahydrocortisol + NADP+ <=> 11beta,17alpha,21-trihydroxy-5beta-pregnane-3,20-dione + NADPH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

androstenediol + NAD+ <=> testosterone + NADH + H+ 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
5.3.3.1 steroid Delta-isomerase


Cholesterol_sulfate + H2O <=> cholesterol + sulfate 3.1.6.2 steryl-sulfatase

NADP+ + 17alpha-estradiol <=> NADPH + estrone + H+ 1.1.1.148 estradiol 17alpha-dehydrogenase
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase



5alpha-pregnane-3beta-ol-20-one + NADP+ <=> H+ + 5alpha-dihydroprogesterone + NADPH 1.1.1.145 3beta-hydroxy-Delta5-steroid dehydrogenase
1.1.1.148 estradiol 17alpha-dehydrogenase
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.270 3beta-hydroxysteroid 3-dehydrogenase
1.1.1.278 3beta-hydroxy-5alpha-steroid dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase









3''-Phosphoadenylyl_sulfate + 2-methoxyestradiol-17beta <=> Adenosine_3'',5''-bisphosphate + 2-Methoxyestradiol-17beta_3-sulfate 2.8.2.15 steroid sulfotransferase

(22R)-22-hydroxycholesterol + O2 + reduced_adrenodoxin + H+ <=> (20R,22R)-20,22-dihydroxy-cholesterol + H2O + oxidized_ferredoxin 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)

androstenediol + NADP+ <=> dehydroepiandrosterone + NADPH 1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase
1.1.1.64 testosterone 17beta-dehydrogenase (NADP+)



17alpha-hydroxyprogesterone + reduced_flavodoxin + O2 <=> 11-deoxycortisol + flavin + H2O 1.14.14.16 steroid 21-monooxygenase

cholesterol + O2 + 2 H+ + 2 reduced_ferredoxin <=> 20alpha-hydroxycholesterol + H2O + 2 oxidized_ferredoxin 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)

17alpha,21-dihydroxy-5beta-pregnane-3,11,20-trione + NADP+ <=> H+ + cortisone + NADPH 1.3.1.3 Delta4-3-oxosteroid 5beta-reductase

cortisol + NADP+ <=> cortisone + NADPH + H+ 1.1.1
1.1.1.146 11beta-hydroxysteroid dehydrogenase
1.1.1.B40



3''-phosphoadenylyl-sulfate + estrone <=> adenosine_3,5''-bisphosphate + Estrone_3-sulfate + H+ 2.8.2.14 bile-salt sulfotransferase
2.8.2.15 steroid sulfotransferase
2.8.2.2 alcohol sulfotransferase
2.8.2.4 estrone sulfotransferase




19-hydroxytestosterone + O2 + reduced_flavodoxin <=> 19-oxotestosterone + 2 H2O + flavin 1.14.14.14 aromatase

progesterone + O2 + reduced_acceptor <=> 11alpha-hydroxyprogesterone + H2O + acceptor 1.14.99.14 progesterone 11alpha-monooxygenase

5beta-pregnane-3,20-dione + acceptor <=> progesterone + reduced_acceptor 1.3.99.6 3-oxo-5beta-steroid 4-dehydrogenase

androstenediol + NAD+ <=> dehydroepiandrosterone + NADH 1.1.1.239 3alpha(17beta)-hydroxysteroid dehydrogenase (NAD+)
1.1.1.51 3(or 17)beta-hydroxysteroid dehydrogenase
1.1.1.62 17beta-estradiol 17-dehydrogenase



NAD+ + 17alpha-estradiol <=> NADH + estrone + H+ 1.1.1.148 estradiol 17alpha-dehydrogenase
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase


cortisol + NADPH <=> 11beta,17alpha,21-trihydroxy-5beta-pregnane-3,20-dione + NADP+ 1.3.1.3 Delta4-3-oxosteroid 5beta-reductase

corticosterone + O2 + reduced_adrenodoxin + H+ <=> 18-hydroxycorticosterone + H2O + oxidized_ferredoxin 1.14.15.4 steroid 11beta-monooxygenase
1.14.15.5 corticosterone 18-monooxygenase


17alpha-hydroxyprogesterone + reduced_flavodoxin + O2 <=> 4-androstene-3,17-dione + acetate + flavin + H2O 1.14.14.32 17alpha-hydroxyprogesterone deacetylase

18-hydroxycorticosterone + reduced_adrenodoxin + H+ + O2 <=> H2O + aldosterone + oxidized_ferredoxin 1.14.15.4 steroid 11beta-monooxygenase
1.14.15.5 corticosterone 18-monooxygenase


Tetrahydrocorticosterone + NAD+ <=> 5beta-dihydrocorticosterone + NADH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

allopregnanolone + NADPH <=> 5alpha-pregnane-3alpha,20alpha-diol + NADP+ 1.1.1.149 20alpha-hydroxysteroid dehydrogenase

progesterone + 2 reduced_ferredoxin + O2 + 2 H+ <=> 11beta-hydroxyprogesterone + 2 oxidized_ferredoxin + H2O 1.14.15.4 steroid 11beta-monooxygenase

3alpha,11beta,21-trihydroxy-20-oxo-5beta-pregnan-18-al + NAD+ <=> 11beta,21-dihydroxy-3,20-oxo-5beta-pregnan-18-al + NADH + H+ 1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)

estrone + H+ + O2 + NADPH <=> 2-hydroxyestrone + NADP+ + H2O 1.14.14.1 unspecific monooxygenase

11-deoxycorticosterone + NADPH <=> 5alpha-pregnane-21-ol-3,20-dione + NADP+ 1.3.1.22 3-oxo-5alpha-steroid 4-dehydrogenase (NADP+)

estrone + UDP-glucuronate <=> UDP + estrone_3-glucuronide 2.4.1.17 glucuronosyltransferase

5alpha-androstane-3,17-dione + NADP+ <=> 4-androstene-3,17-dione + NADPH + H+ 1.3.1.22 3-oxo-5alpha-steroid 4-dehydrogenase (NADP+)

5alpha-dihydroprogesterone + NADP+ <=> progesterone + NADPH + H+ 1.3.1.22 3-oxo-5alpha-steroid 4-dehydrogenase (NADP+)
1.3.99.5 3-oxo-5alpha-steroid 4-dehydrogenase (acceptor)


21-deoxycortisol + reduced_flavodoxin + O2 <=> cortisol + flavin + H2O 1.14.14.16 steroid 21-monooxygenase

20alpha-hydroxycholesterol + reduced_flavodoxin + O2 <=> 17alpha,20alpha-dihydroxycholesterol + flavin + H2O 1.14.14.19 steroid 17alpha-monooxygenase

3''-phosphoadenylylsulfate + 17beta-estradiol <=> adenosine_3'',5''-bisphosphate + estradiol_3-sulfate 2.8.2.1 aryl sulfotransferase
2.8.2.14 bile-salt sulfotransferase
2.8.2.15 steroid sulfotransferase
2.8.2.2 alcohol sulfotransferase
2.8.2.3 amine sulfotransferase
2.8.2.4 estrone sulfotransferase






5alpha-pregnan-20alpha-ol-3-one + NADP+ <=> 5alpha-dihydroprogesterone + NADPH 1.1.1.149 20alpha-hydroxysteroid dehydrogenase
1.1.1.357 3alpha-hydroxysteroid 3-dehydrogenase


4-androstene-3,17-dione + O2 + reduced_flavodoxin <=> 19-hydroxyandrost-4-ene-3,17-dione + H2O + flavin 1.14.14.14 aromatase

progesterone + reduced_flavodoxin + O2 <=> 17alpha-hydroxyprogesterone + flavin + H2O 1.14.14.19 steroid 17alpha-monooxygenase
1.14.14.32 17alpha-hydroxyprogesterone deacetylase


O2 + reduced_acceptor + 17beta-estradiol <=> H2O + acceptor + 6beta-Hydroxyestradiol-17beta 1.14.99.11 estradiol 6beta-monooxygenase

pregnenolone_sulfate + H2O <=> pregnenolone + sulfate 3.1.6.2 steryl-sulfatase

testosterone + reduced_flavodoxin + O2 <=> 7alpha,17beta-dihydroxyandrost-4-en-3-one + flavin + H2O 1.14.14.1 unspecific monooxygenase

5beta-androstane-3,17-dione + NADPH <=> 5beta-androstane-3alpha-ol-17-one + NADP+ 1.1.1.112 indanol dehydrogenase
1.1.1.184 carbonyl reductase (NADPH)
1.1.1.209 3(or 17)alpha-hydroxysteroid dehydrogenase
1.1.1.213 3alpha-hydroxysteroid 3-dehydrogenase (Re-specific)
1.1.1.50 3alpha-hydroxysteroid 3-dehydrogenase (Si-specific)





testosterone + NADPH + H+ <=> 5beta-dihydrotestosterone + NADP+ 1.3.1.3 Delta4-3-oxosteroid 5beta-reductase

Visualization of the pathway