KEGG Orthology (KO) [BR:ko00001]
09100 Metabolism
09103 Lipid metabolism
00120 Primary bile acid biosynthesis
K07430 CYP7B; 25/26-hydroxycholesterol 7alpha-hydroxylase
00140 Steroid hormone biosynthesis
K07430 CYP7B; 25/26-hydroxycholesterol 7alpha-hydroxylase
09180 Brite Hierarchies
09181 Protein families: metabolism
00199 Cytochrome P450
K07430 CYP7B; 25/26-hydroxycholesterol 7alpha-hydroxylase
Enzymes [BR:ko01000]
1. Oxidoreductases
1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
1.14.14 With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen into the other donor
1.14.14.29 25/26-hydroxycholesterol 7alpha-hydroxylase
K07430 CYP7B; 25/26-hydroxycholesterol 7alpha-hydroxylase
Cytochrome P450 [BR:ko00199]
Cytochrome P450, animal type
CYP7 family
K07430 CYP7B; 25/26-hydroxycholesterol 7alpha-hydroxylase
Oxidoreductases;
Acting on paired donors, with incorporation or reduction of molecular oxygen;
With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen into the other donor
A P-450 (heme-thiolate) protein. Unlike EC 1.14.14.26, 24-hydroxycholesterol 7alpha-monooxygenase, which is specific for its oxysterol substrate, this enzyme can also metabolize the oxysterols 24,25-epoxycholesterol, 22-hydroxycholesterol and 24-hydroxycholesterol, but to a lesser extent [2]. The direct electron donor to the enzyme is EC 1.6.2.4, NADPH---hemoprotein reductase.
History
EC 1.14.14.29 created 2005 as EC 1.14.13.100, modified 2013 (EC 1.14.13.60 created 1999, incorporated 2013), transferred 2016 to EC 1.14.14.29
Toll A, Wikvall K, Sudjana-Sugiaman E, Kondo KH, Bjorkhem I.
Title
7 alpha hydroxylation of 25-hydroxycholesterol in liver microsomes. Evidence that the enzyme involved is different from cholesterol 7 alpha-hydroxylase.
Enzymatic reactions [BR:br08201]
1. Oxidoreductase reactions
1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
1.14.14 With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen into the other donor
1.14.14.29
R08943 Pregnenolone + NADPH + H+ + Oxygen <=> 7alpha-Hydroxypregnenolone + NADP+ + H2O