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Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III)
Published on: August 31, 2018
NATIVE AND REGENERATED BOVINE ALBUMIN : II. IMMUNOLOGICAL PROPERTIES.
D S Martin1, J O Erickson, F W Putnam
1Departments of Bacteriology and Biochemistry, Duke University, School of Medicine and Duke Hospital, Durham.
The Journal of General Physiology
|October 30, 2009
Summary
Regenerating bovine albumin using urea or guanidine hydrochloride affects its antigenic activity. Native albumin showed the highest activity, while guanidine hydrochloride-regenerated albumin was significantly less antigenic.
Area of Science:
- Immunology
- Protein Chemistry
- Biochemistry
Background:
- Native bovine albumin serves as a benchmark for studying protein structure-antigenicity relationships.
- Protein denaturation and regeneration can alter immunological properties.
- Carbohydrate content may influence the antigenic activity of proteins.
Purpose of the Study:
- To investigate the impact of regeneration from urea and guanidine hydrochloride on the antigenic activity and serological specificity of bovine albumin.
- To compare the antigenicity of native albumin, urea-regenerated albumin, and guanidine hydrochloride-regenerated albumin.
- To assess the antigenicity of native, crystalline, carbohydrate-free albumin (crystalbumin) relative to native whole albumin.
Main Methods:
- Precipitin measurements were employed using rabbit antisera raised against native whole albumin, urea-regenerated albumin, and guanidine hydrochloride-regenerated albumin.
- Statistical analysis was performed to determine the significance of differences in antigenic activity.
- Immunological equivalence of different albumin forms was assessed.
Main Results:
- The mean antibody response decreased in the order: native albumin > urea-regenerated albumin > guanidine hydrochloride-regenerated albumin.
- The reduction in antigenic activity between native and guanidine hydrochloride-regenerated albumin was statistically significant.
- Native, crystalline, carbohydrate-free albumin (crystalbumin) exhibited significantly lower antigenicity compared to native whole bovine albumin.
Conclusions:
- Protein structure and carbohydrate content are critical factors influencing the antigenic activity of bovine albumin.
- Regeneration from 8 M guanidine hydrochloride significantly diminishes the antigenic potential of bovine albumin.
- While structural changes occur upon regeneration, the tested albumin variants remained immunologically equivalent.
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