| EC |
1.14.15.22 |
| Accepted name: |
vitamin D 1,25-hydroxylase |
| Reaction: |
(1) calciol + O2 + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ = calcidiol + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O
(2) calcidiol + 2 reduced ferredoxin [iron-sulfur] cluster + 2 H+ + O2 = calcitriol + 2 oxidized ferredoxin [iron-sulfur] cluster + H2O
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| Glossary: |
calciol = cholecalciferol = vitamin D3 = (3S,5Z,7E)-9,10-seco-5,7,10(19)-cholestatriene-3-ol
calcidiol = 25-hydroxyvitamin D3 = (3S,5Z,7E)-9,10-seco-5,7,10(19)-cholestatriene-3,25-diol
calcitriol = 1α,25-dihydroxyvitamin D3 = (1S,3R,5Z,7E)-9,10-seco-5,7,10(19)-cholestatriene-1,3,25-triol |
| Other name(s): |
CYP105A1; Streptomyces griseolus cytochrome P450SU-1 |
| Systematic name: |
calciol,ferredoxin:oxygen oxidoreductase (1,25-hydroxylating) |
| Comments: |
A P-450 (heme-thiolate) enzyme found in the bacterium Streptomyces griseolus. cf. EC 1.14.14.24, vitamin D 25-hydroxylase and EC 1.14.15.18, calcidiol 1-monooxygenase. |
| References: |
| 1. |
Sawada, N., Sakaki, T., Yoneda, S., Kusudo, T., Shinkyo, R., Ohta, M. and Inouye, K. Conversion of vitamin D3 to 1α,25-dihydroxyvitamin D3 by Streptomyces griseolus cytochrome P450SU-1. Biochem. Biophys. Res. Commun. 320 (2004) 156–164. [PMID: 15207715] |
| 2. |
Sugimoto, H., Shinkyo, R., Hayashi, K., Yoneda, S., Yamada, M., Kamakura, M., Ikushiro, S., Shiro, Y. and Sakaki, T. Crystal structure of CYP105A1 (P450SU-1) in complex with 1α,25-dihydroxyvitamin D3. Biochemistry 47 (2008) 4017–4027. [PMID: 18314962] |
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| [EC 1.14.15.22 created 2016] |
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