Artículo
Orientational Pathways during Protein Translocation through Polymer-Modified Nanopores
Gonzalez Solveyra, Estefania
; Pérez Sirkin, Yamila Anahí
; Tagliazucchi, Mario Eugenio
; Szleifer, Igal
Fecha de publicación:
04/2024
Editorial:
American Chemical Society
Revista:
ACS Nano
ISSN:
1936-0851
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Protein translocation through nanopores holds significant promise for applications in biotechnology, biomolecular analysis, and medicine. However, the interpretation of signals generated by the translocation of the protein remains challenging. In this way, it is crucial to gain a comprehensive understanding on how macromolecules translocate through a nanopore and to identify what are the critical parameters that govern the process. In this study, we investigate the interplay between protein charge regulation, orientation, and nanopore surface modifications using a theoretical framework that allows us to explicitly take into account the acid–base reactions of the titrable amino acids in the proteins and in the polyelectrolytes grafted to the nanopore surface. Our goal is to thoroughly characterize the translocation process of different proteins (GFP, β-lactoglobulin, lysozyme, and RNase) through nanopores modified with weak polyacids. Our calculations show that the charge regulation mechanism exerts a profound effect on the translocation process. The pH-dependent interactions between proteins and charged polymers within the nanopore lead to diverse free energy landscapes with barriers, wells, and flat regions dictating translocation efficiency. Comparison of different proteins allows us to identify the significance of protein isoelectric point, size, and morphology in the translocation behavior. Taking advantage of these insights, we propose pH-responsive nanopores that can load proteins at one pH and release them at another, offering opportunities for controlled protein delivery, separation, and sensing applications.
Palabras clave:
NANOPORE
,
PROTEIN
,
TRANSLOCATION
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Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Gonzalez Solveyra, Estefania; Pérez Sirkin, Yamila Anahí; Tagliazucchi, Mario Eugenio; Szleifer, Igal; Orientational Pathways during Protein Translocation through Polymer-Modified Nanopores; American Chemical Society; ACS Nano; 18; 15; 4-2024; 10427-10438
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