Origin of Proteolytic Stability of Peptide-Brush Polymers as Globular Proteomimetics
| Autor: | Steven Weigand, Monica Olvera de la Cruz, Nathan C. Gianneschi, Wonmin Choi, Omar M. Ebrahim, Hao Sun, Nicholas Hampu, Julia Oktawiec, Matthew P. Thompson, Baofu Qiao, Naneki C. McCallum |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | ACS Central Science, Vol 7, Iss 12, Pp 2063-2072 (2021) ACS Central Science |
| ISSN: | 2374-7951 |
| Popis: | Peptide-brush polymers (PBPs), wherein every side-chain of the polymers is peptidic, represent a new class of proteomimetic with unusually high proteolytic resistance while maintaining bioactivity. Here, we sought to determine the origin of this behavior and to assess its generality via a combined theory and experimental approach. A series of PBPs with various polymer backbone structures were prepared and examined for their proteolytic stability and bioactivity. We discovered that an increase in the hydrophobicity of the polymer backbones is predictive of an elevation in proteolytic stability of the side-chain peptides. Computer simulations, together with small-angle X-ray scattering (SAXS) analysis, revealed globular morphologies for these polymers, in which pendant peptides condense around hydrophobic synthetic polymer backbones driven by the hydrophobic effect. As the hydrophobicity of the polymer backbones increases, the extent of solvent exposure of peptide cleavage sites decreases, reducing their accessibility to proteolytic enzymes. This study provides insight into the important factors driving PBP aqueous-phase structures to behave as globular, synthetic polymer-based proteomimetics. This study sheds light on the origin of peptide-brush polymers as globular proteomimetics and protein-like polymers by examining them for their structure and stability. |
| Databáze: | OpenAIRE |
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