7-Hydroxylation of 3-oxygenated C27-, C28-, and C29-steroids in rat liver 18,000 g supernate.
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چکیده
منابع مشابه
Sex differences in cytochrome P-450-dependent 25-hydroxylation of C27-steroids and vitamin D3 in rat liver microsomes.
Monoclonal antibodies directed against the cytochrome P-450 catalyzing 25-hydroxylation of C27-steroids and vitamin D3 (Andersson, S., Holmberg, I., and Wikvall, K. (1983) J. Biol. Chem. 258, 6777-6781) have been prepared by immunization of mice in hind footpads. Lymph node cells from the mice were fused with the Sp 2/0-Ag 14 line of mouse myeloma cells. A monoclonal antibody, designated MAb-25...
متن کامل25-hydroxylation of C27-steroids and vitamin D3 by a constitutive cytochrome P-450 from rat liver microsomes.
A constitutive cytochrome P-450 catalyzing 25-hydroxylation of C27-steroids and vitamin D3 was purified from rat liver microsomes. The enzyme fraction contained 16 nmol of cytochrome P-450/mg of protein and showed only one protein band with a minimum molecular weight of 51,000 upon sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The purified cytochrome P-450 catalyzed 25-hydroxylatio...
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The metabolism of 4-[4-Wlandrostene-3,17-dione, 4-[4r4C]pregnene-3,20-dione, 5&-[4-r4C]androstane-3cr,l7P-diol, 4,16-[70+~H]androstadien-3-one, [4-W]cholesterol, and 7~ hydroxy-4-[6P-3H]cholesten-3-one was studied in the microsomal fraction of livers from adult male and female rats which had been castrated neonatally or postpubertally. The effect of testosterone propionate treatment on postpube...
متن کاملEffect of the side-chain structure on the specificity of beta-oxidation in bile acid biosynthesis in rat liver homogenates.
3Alpha, 7alpha, 12alpha-trihydroxy-5beta-cholestan-26-oic acid (C27-5beta-cholestanoic acid) derivatives with different carbon-number side chains were incubated with rat liver 800 g supernatant to study the effect of the side-chain length on the beta-oxidation system in bile acid biosynthesis. The intermediate alpha, beta-unsaturated and beta-hydroxylated bile acids, and the corresponding degra...
متن کاملDemonstration of 26-hydroxylation of C27-steroids in human skin fibroblasts, and a deficiency of this activity in cerebrotendinous xanthomatosis.
26-Hydroxylation of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol and other C27-steroids was demonstrated in cultured skin fibroblasts from healthy individuals. Activities in skin fibroblasts were approximately 5-10% of those previously found in human liver homogenates, and were inhibited by CO. The apparent Km was lowest for 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol (1.3 mumol/li...
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ژورنال
عنوان ژورنال: Journal of Lipid Research
سال: 1978
ISSN: 0022-2275
DOI: 10.1016/s0022-2275(20)40676-5