Binding of 7-dehydrocholesterol to sterol carrier protein and vitamin D3 effect.
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منابع مشابه
Binding of 7-dehydrocholesterol to sterol carrier protein and vitamin D3 effect.
It was confirmed that delta 5,7-sterol delta 7-reductase activity was suppressed by cholecalciferol (vitamin D3) in the enzyme system consisted of microsomes and sterol carrier protein (SCP). The enzyme activity was significantly decreased in the combination with microsomes obtained from either vitamin D-deficient or vitamin D3-treated rat liver and with SCP obtained from vitamin D3-treated rat...
متن کاملProvitamin D3 in tissues and the conversion of cholesterol to 7-dehydrocholesterol in vivo.
The discovery that the absorption bands at 293, 281-5 and 271 m,u. (Heilbron, Kamm & Morton, 1926, 1927) present in fractions obtained in the recrystallization of cholesterol were shown very strongly by ergosterol (Rosenheim & Webster, 1927) focused interest on the latter and culminated in the isolation ofcalciferol (vitamin D2). Some time later it was recognized that 7-dehydrocholesterol was a...
متن کاملSpecific binding protein for active metabolites of vitamin D3.
FIG. 1 Separation of the specific protein binding with vitamin D3 and its metabolites in rat intes tinal cytoplasm by gel filtration on Sephadex G 200 after the administration of vitamin D3-3H in vivo. 1,000I.U. (3•~105cpm) of randomly labeled vitamin D3 (sp. act. 1.2•~104cpm/ug) was injected intracar dially to vitamin D deficient rat 16 hours before decapitation. 2.0 ml of rat intestinal cytop...
متن کاملSterol metabolism. 6. The interconversion of cholesterol, 7-dehydrocholesterol and lathosterol in the rat.
The three closely related sterols, cholesterol, 7-dehydrocholesterol and lathosterol, occur in animal tissues in different proportions. From their structures they would appear to be interconvertible by simple dehydrogenation or reduction steps as shown in Fig. 1, but unequivocal evidence for such a mechanism has not yet been obtained. It has generally been assumed that 7-dehydrocholesterol (pro...
متن کاملFibroblast membrane sterol kinetic domains: modulation by sterol carrier protein-2 and liver fatty acid binding protein.
The mechanism(s) of intracellular sterol trafficking among subcellular organelle membranes is not well understood. Relative contributions of vesicular, sterol carrier protein, and membrane sterol domain pathways are not resolved. A sterol kinetic assay was used to resolve multiple sterol domains in microsome (MICRO), mitochondria (MITO), and plasma (PM) membrane: exchangeable, 20-40% of total; ...
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ژورنال
عنوان ژورنال: Journal of Nutritional Science and Vitaminology
سال: 1975
ISSN: 0301-4800,1881-7742
DOI: 10.3177/jnsv.21.387