Aggregation in Aqueous Solutions of Bovine Lens y-Crystallins: Special Role of ys

نویسندگان

  • Canwen Liu
  • Jayanti Pande
  • Aleksey Lomakin
  • Olutayo Ogun
  • George B. Benedek
چکیده

RESULTS. All of the y-crystallins studied formed large aggregates (or "megamers") in aqueous solutions. However, each protein differed in the relative rates of formation of megamers. ysCrystallin formed megamers much more slowly than y,,and yIVa-crystallin. In solutions containing mixtures of y,, and ys, and y,Va and ys, ys-crystallin significantly suppressed the aggregation of y,,and yIV:i-crystallin. Megamerization seemed to be associated with thiol oxidation in these proteins.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Phase separation in aqueous solutions of lens y - crystallins : Special role of ys ( ternary mixture / cataract )

We have studied liquid-liquid phase separation in aqueous ternary solutions of calf lens 'y-crystallin proteins. Specifically, we have examined two ternary systems containing ys-namely, yIVa with ys in water and yll with ys in water. For each system, the phase-separation temperatures (Tph(4)))a as a function of the overall protein volume fraction ¢b at various fixed compositions a (the "cloud-p...

متن کامل

Comparison of ultraviolet induced photo-kinetics for lens-derived and recombinant beta-crystallins.

PURPOSE The photobiology of purified recombinant crystallins has not been studied. Here we examine photo-induced aggregation of purified recombinant mouse betaA3-crystallin (rbetaA3) and compare it with that of betaL-crystallins isolated from bovine lenses. METHODS rbetaA3-Crystallin was expressed in baculovirus-infected Sf9 cells and purified by ion-exchange and gel-filtration chromatography...

متن کامل

P 223 The glycation of bovine lens βL-, βS- and γ-crystallins demonstrated by frozen-sectioning and isoelectric focusing

Purtx~se: We like to demonstrate glycation of S,-, R,and y-crystallins in the microsectioned bovine lens, by isoelectric focusing using three staining methods. Methods: Pour bovine lenses of 1.185+0.131 years were frozen-sectioned into equa'cor and 11 layers. Watersoluble crvstallins were seuarated bv isoelectric focusing an8 stained: 1. with ?oomassie brilliant Blue (CBB); 2. with the lectin (...

متن کامل

Aggregation of α-crystallins in kynurenic acid-sensitized UVA photolysis under anaerobic conditions.

The reactions of photoexcited kynurenic acid (KNA) with bovine α-crystallins under anaerobic conditions proceed via the electron transfer from tryptophan (Trp) and tyrosine (Tyr) residues to the triplet KNA molecules. The subsequent radical reactions lead to the protein aggregation and insolubilization. The absorption of the photolyzed proteins at 335 nm as well as their total fluorescence sign...

متن کامل

Calcium-induced aggregation of bovine lens alpha crystallins.

The theory of light scattering indicates that aggregation of the crystalline lens proteins can produce opacity. Furthermore, it is known that calcium increase? in the cataractous lens. We have, therefore, investigated the effectiveness of calcium ion in producmg aggregates of the soluble proteins of the bovine lens. The experimental restdts show: (1) CaCU produce's aggregates of the soluble pro...

متن کامل

ذخیره 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 نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2005