Electrophoretic behavior of normal human serum albumin at pH4.0. II. Interpretation of electrophoretic patterns in terms of a reversible protein interaction.
نویسندگان
چکیده
In the preceding paper on the behavior of pooled normal human serum albumin in various buffers at pH 4.0 (1)) it was demonstrated that the electrophoretic pattern of albumin shows a single moving boundary in the presence of the lower fatty acids, excepting formic and acetic acid, and of certain diand tribasic organic acids. This phenomenon is probably a consequence of the interaction between this protein and the monobasic organic acids mentioned, due to forces between the nonpolar portions of the interactants. The introduction of a hydroxyl or an amino group into the fatty acids with more than two carbon atoms caused significant diminution of the binding and, thus, produced marked changes in the electrophoretic bchavior of the protein. In these media, the electrophoretic patterns showed several moving boundaries. The interaction between albumin and certain other diand tribasic organic acids, such as malonic, ma&c, and citric acid, appeared to be primarily due to electrostatic forces. However, similar organic acids with truns configuration (fumaric acid) did not change the electrophoretic patterns; this points to a steric requirement for this reaction (1). The aim of this paper is to present evidence for the reversibility of the interaction between albumin and organic acids as judged by free electrophoresis at pH 4.0 in r/2 0.1 buffer solutions. Moreover, studies on the effect of biand trivalent metallic ions upon serum albumin, leading to similar observations, are also described.
منابع مشابه
Electrophoretic Behavior of Normal Human Serum Albumin at pH 4.0
In the preceding paper on the behavior of pooled normal human serum albumin in various buffers at pH 4.0 (1)) it was demonstrated that the electrophoretic pattern of albumin shows a single moving boundary in the presence of the lower fatty acids, excepting formic and acetic acid, and of certain diand tribasic organic acids. This phenomenon is probably a consequence of the interaction between th...
متن کاملCharacteristic Electrophoretic Patterns of serum protein of Several species of snakes of Iran
متن کامل
Effect of binding of ions and other small molecules on protein structure. VII. The role of aliphatic acid binding and of convection in the electrophoresis of serum albumin at low pH.
Bovine serum albumin undergoes two electrophoretically distinguishable types of interaction in acidic media (1). The first (l-6), which is also shown by ovalbumin, bovine y-pseudoglobulin and oxidized ribonuclease, is observed only in media containing acetate buffer (NaAc-HAc) or other carboxylic acid buffers. The various peaks shown by the electrophoretic patterns obtained in these media corre...
متن کاملElectrophoretic mobility-ionic strength studies of proteins. IV. The effect of lipids on the electrophoretic patterns of human serum albumin at acid pH.
In previous publications from this laboratory, we have investigated the anomalous behavior of human serum albumin (l), various animal albumins (2) and human -y-globulin (3) in the Tiselius electrophoresis apparatus at acid pH. Because of increasing interest in the behavior of proteins in the acid region below their isoelectric point, this phenomenon has been receiving increasing attention from ...
متن کاملبررسی ترکیبات گلیکوزیله نهایی آلبومین سرم (AGE) در افراد دیابتی به روش ایزوالکتریک فوکوسینگ (IEF) و فلورسانس جهت ارزیابی پیشرفت بیماری دیابت
Background: The non-enzymatic glycosylation (NEG) of proteins in diabetes damages both the structure and function of these proteins. In vivo and in vitro studies have shown that NEG of proteins and advanced glycosylation end-products (AGE) contribute to the pathogenesis of both macrovascular, such as atherosclerosis, and microvascular complications, such as retinopathy and nephropathy, in diabe...
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:
- The Journal of biological chemistry
دوره 235 شماره
صفحات -
تاریخ انتشار 1960