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Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces

Multivalent ligand–protein interactions are a commonly employed approach by nature in many biological processes. Single glycan–protein interactions are often weak, but their affinity and specificity can be drastically enhanced by engaging multiple binding sites. Microarray technology allows for quic...

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Autores principales: Tsouka, Alexandra, Hoetzel, Kassandra, Mende, Marco, Heidepriem, Jasmin, Paris, Grigori, Eickelmann, Stephan, Seeberger, Peter H., Lepenies, Bernd, Loeffler, Felix F.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8589469/
https://www.ncbi.nlm.nih.gov/pubmed/34778215
http://dx.doi.org/10.3389/fchem.2021.766932
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author Tsouka, Alexandra
Hoetzel, Kassandra
Mende, Marco
Heidepriem, Jasmin
Paris, Grigori
Eickelmann, Stephan
Seeberger, Peter H.
Lepenies, Bernd
Loeffler, Felix F.
author_facet Tsouka, Alexandra
Hoetzel, Kassandra
Mende, Marco
Heidepriem, Jasmin
Paris, Grigori
Eickelmann, Stephan
Seeberger, Peter H.
Lepenies, Bernd
Loeffler, Felix F.
author_sort Tsouka, Alexandra
collection PubMed
description Multivalent ligand–protein interactions are a commonly employed approach by nature in many biological processes. Single glycan–protein interactions are often weak, but their affinity and specificity can be drastically enhanced by engaging multiple binding sites. Microarray technology allows for quick, parallel screening of such interactions. Yet, current glycan microarray methodologies usually neglect defined multivalent presentation. Our laser-based array technology allows for a flexible, cost-efficient, and rapid in situ chemical synthesis of peptide scaffolds directly on functionalized glass slides. Using copper(I)-catalyzed azide–alkyne cycloaddition, different monomer sugar azides were attached to the scaffolds, resulting in spatially defined multivalent glycopeptides on the solid support. Studying their interaction with several different lectins showed that not only the spatially defined sugar presentation, but also the surface functionalization and wettability, as well as accessibility and flexibility, play an essential role in such interactions. Therefore, different commercially available functionalized glass slides were equipped with a polyethylene glycol (PEG) linker to demonstrate its effect on glycan–lectin interactions. Moreover, different monomer sugar azides with and without an additional PEG-spacer were attached to the peptide scaffold to increase flexibility and thereby improve binding affinity. A variety of fluorescently labeled lectins were probed, indicating that different lectin–glycan pairs require different surface functionalization and spacers for enhanced binding. This approach allows for rapid screening and evaluation of spacing-, density-, ligand and surface-dependent parameters, to find optimal lectin binders.
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spelling pubmed-85894692021-11-13 Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces Tsouka, Alexandra Hoetzel, Kassandra Mende, Marco Heidepriem, Jasmin Paris, Grigori Eickelmann, Stephan Seeberger, Peter H. Lepenies, Bernd Loeffler, Felix F. Front Chem Chemistry Multivalent ligand–protein interactions are a commonly employed approach by nature in many biological processes. Single glycan–protein interactions are often weak, but their affinity and specificity can be drastically enhanced by engaging multiple binding sites. Microarray technology allows for quick, parallel screening of such interactions. Yet, current glycan microarray methodologies usually neglect defined multivalent presentation. Our laser-based array technology allows for a flexible, cost-efficient, and rapid in situ chemical synthesis of peptide scaffolds directly on functionalized glass slides. Using copper(I)-catalyzed azide–alkyne cycloaddition, different monomer sugar azides were attached to the scaffolds, resulting in spatially defined multivalent glycopeptides on the solid support. Studying their interaction with several different lectins showed that not only the spatially defined sugar presentation, but also the surface functionalization and wettability, as well as accessibility and flexibility, play an essential role in such interactions. Therefore, different commercially available functionalized glass slides were equipped with a polyethylene glycol (PEG) linker to demonstrate its effect on glycan–lectin interactions. Moreover, different monomer sugar azides with and without an additional PEG-spacer were attached to the peptide scaffold to increase flexibility and thereby improve binding affinity. A variety of fluorescently labeled lectins were probed, indicating that different lectin–glycan pairs require different surface functionalization and spacers for enhanced binding. This approach allows for rapid screening and evaluation of spacing-, density-, ligand and surface-dependent parameters, to find optimal lectin binders. Frontiers Media S.A. 2021-10-26 /pmc/articles/PMC8589469/ /pubmed/34778215 http://dx.doi.org/10.3389/fchem.2021.766932 Text en Copyright © 2021 Tsouka, Hoetzel, Mende, Heidepriem, Paris, Eickelmann, Seeberger, Lepenies and Loeffler. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Tsouka, Alexandra
Hoetzel, Kassandra
Mende, Marco
Heidepriem, Jasmin
Paris, Grigori
Eickelmann, Stephan
Seeberger, Peter H.
Lepenies, Bernd
Loeffler, Felix F.
Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces
title Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces
title_full Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces
title_fullStr Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces
title_full_unstemmed Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces
title_short Probing Multivalent Carbohydrate-Protein Interactions With On-Chip Synthesized Glycopeptides Using Different Functionalized Surfaces
title_sort probing multivalent carbohydrate-protein interactions with on-chip synthesized glycopeptides using different functionalized surfaces
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8589469/
https://www.ncbi.nlm.nih.gov/pubmed/34778215
http://dx.doi.org/10.3389/fchem.2021.766932
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