Isolation and Characterization of an Esterified Form of Steryl Glucoside.
نویسنده
چکیده
A hitherto unreported esterified form of steryl glucoside has been isolated from potato tuber lipids and soybean phosphatides. It is composed of sterol, glucose, and fatty acid in the molar ratio 1 : 1 : 1. Four components of the sterol moiety have been detected ; they include &sitosterol and stigmasterol (identified by gas-liquid chromatography). Fatty acids are palmitic, stearic, oleic, linoleic, and IinoIenic acids. As demonstrated by infrared analysis and periodate oxidation, the fatty acid is located on C S of the sugar portion.
منابع مشابه
Analysis of Steryl Glucosides in Foods and Dietary Supplements by Solid-phase Extraction and Gas Chromatography
A method to quantify b -sitosterol (BSS) and b -sitosteryl glucoside (BSSG) in dietary supplements containing added BSS and BSSG was developed and also validated for the analysis of naturally occurring free and esterified sterols and steryl glucosides in foods. Steryl glucosides were extracted with hexane-diethyl ether (1 : 1, v/v) after the alkaline saponification of a powdered supplement or o...
متن کاملMetabolism of conjugated sterols in eggplant. Part 2. Phospholipid : steryl glucoside acyltransferase.
A membrane-bound phospholipid : steryl glucoside acyltransferase from Solanum melongena leaves was partially purified and its specificity and molecular as well as kinetic properties were defined. Among the steryl glycosides tested (e.g. typical plant steryl glucosides, steryl galactosides and cholesteryl xyloside) the highest activity was found with cholesteryl glucoside, but some structurally ...
متن کاملEffect of filipin on the permeability of red beet and potato tuber discs.
The discovery of an acylated steryl glucoside in plant tissue in 1964 (13) raised the number of known forms of sterols in plants to four. These are the free sterols, sterol esters, steryl glycosides, and acylated steryl glycosides. Kiribuchi et al. (12) analyzed the sterol content of soybean and found that sterol ester was present in very small amount and that the sterol was mostly in the form ...
متن کاملSteryl Glycoside Formation in Seedlings of Nicotiana tabacum L.
Particulate enzyme preparations from tobacco seedlings (Nicotiana tabacum L.) were used in the synthesis of steryl glycoside. The data obtained by measuring cholesterol-4-(14)C incorporation generally agree with results obtained with UDP-glucose-(14)C. The in vitro reaction was linear for the first 10 minutes and had a pH optimum of 7.0 to 7.4. Addition of ATP activated while UDP-glucose inhibi...
متن کاملAcylated Steryl Glycoside Synthesis in Seedlings of Nicotiana tabacum L.
In tobacco seedlings (Nicotiana tabacum L.), glucose from supplied uridine diphosphate-[U-(14)C]glucose was first incorporated into steryl glycosides and later into acylated steryl glycosides. However, when [(14)C]cholesterol was used as substrate, the acylated steryl glycosides became labeled earlier than the steryl glycosides. With [(14)C]cholesteryl glucoside as substrate, most of the radioa...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of lipid research
دوره 5 شماره
صفحات -
تاریخ انتشار 1964