Polyphenolic disaccharides endow proteins with unusual resistance to aggregation

Biotechnology and Bioengineering
Ali Reza A LadiwalaPeter M Tessier

Abstract

Protein aggregation is a common problem during the purification and formulation of therapeutic proteins. Here we report that polyphenolic disaccharides are unusually effective at preventing protein aggregation. We find that two polyphenolic glycosides-naringin and rutin-endow diverse proteins with the ability to unfold without aggregating when heated, as well as the ability to refold without aggregating when cooled at low glycoside concentrations (<5 mM). This extreme solubilizing activity is a synergistic combination of the glycone and aglycone moieties, as combinations of polyphenols and sugars fail to suppress aggregation. Moreover, the activity of polyphenolic disaccharides is remarkably specific since their monosaccharide counterparts (as well as other common excipients such as arginine, trehalose, and cyclodextrin) fail to prevent aggregation at similar concentrations (<25 mM). We expect that polyphenolic disaccharides will be valuable additives for enhancing the solubility of proteins in applications plagued by protein aggregation.

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Citations

Jul 24, 2014·Protein Engineering, Design & Selection : PEDS·Joseph SwiftDaniel Christ
May 10, 2016·International Journal of Biological Macromolecules·Kinjal A PatelIpsita Roy
Jun 30, 2018·Food & Function·Ali AkbariJianping Wu
Apr 9, 2013·The Korean Journal of Chemical Engineering·Simpson GregoireInchan Kwon

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