Purification and characterization of 5 beta-cholestane-3 alpha,7 alpha,12 alpha-triol 27-hydroxylase from female rat liver mitochondria.
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Purification and characterization of vitamin D 25-hydroxylase from rat liver mitochondria.
Vitamin D 25-hydroxylase was purified from female rat liver mitochondria based on the catalytic enzyme activity. The final preparation of cytochrome P-450 was homogeneous judging from sodium dodecyl sulfate-polyacrylamide gel electrophoresis (Mr = 52,500). The specific content of the purified enzyme was 12 nmol/mg of protein. The absorption spectrum of the purified enzyme showed a peak at 417 n...
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Glycerophosphate acyltransferase (GAT) catalyzes the conversion of sn-glycerol 3-phosphate to lysophosphatidic acid (LPA), the first and committed step of triacylglycerol and phospholipid synthesis. In spite of the important regulatory roles GAT may play in this biosynthetic pathway, little information is available on the structure, biochemical properties, and regulation of GAT from eukaryotic ...
متن کاملCerebrotendinous xanthomatosis: a defect in mitochondrial 26-hydroxylation required for normal biosynthesis of cholic acid.
Oxidation of side chain of 5 beta-cholestane-3 alpha,7 alpha,12 alpha-triol was studied in a patient with cerebrotendinous xanthomatosis (CTX) and in control subjects, using various subcellular fractions of liver homogenate and a method based on isotope dilution-mass spectrometry. In the control, 5 beta-cholestane-3 alpha,7 alpha,12 alpha-triol was converted into 5 beta-cholestane-3 alpha,7 alp...
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IN Part 1 [Haslewood, 1939], the isolation from ox liver of oc-7-hydroxycholesterol was reported. Since that time, a '/3-7-hydroxycholesterol' has been mentioned as isolated from hog liver [MacPhillamy, 1940], and /3-7-hydroxycholesterol has been obtained from pregnant mares' serum [Wintersteiner & Ritzmann, 1940]. Wintersteiner & Bergstrom [1941] report further that cholesterol can be converte...
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In vitro hydroxylation of aspartic acid has recently been demonstrated in a synthetic peptide based on the structure of the first epidermal growth factor domain in human factor IX (Gronke, R. S., VanDusen, W. J., Garsky, V. M., Jacobs, J. W., Sardana, M. K., Stern, A. M., and Friedman, P. A. (1989) Proc. Natl. Acad. Sci. U.S.A. 86, 3609-3613). The putative enzyme responsible for the posttransla...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1988
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(19)81335-2