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Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides

Affibody molecules are small affinity proteins that have excellent properties for many different applications, ranging from biotechnology to diagnostics and therapy. The relatively flat binding surface is typically resulting in high affinity and specificity when developing binding reagents for globu...

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Detalles Bibliográficos
Autores principales: Hjelm, Linnea Charlotta, Lindberg, Hanna, Ståhl, Stefan, Löfblom, John
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9821733/
https://www.ncbi.nlm.nih.gov/pubmed/36614273
http://dx.doi.org/10.3390/ijms24010836
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author Hjelm, Linnea Charlotta
Lindberg, Hanna
Ståhl, Stefan
Löfblom, John
author_facet Hjelm, Linnea Charlotta
Lindberg, Hanna
Ståhl, Stefan
Löfblom, John
author_sort Hjelm, Linnea Charlotta
collection PubMed
description Affibody molecules are small affinity proteins that have excellent properties for many different applications, ranging from biotechnology to diagnostics and therapy. The relatively flat binding surface is typically resulting in high affinity and specificity when developing binding reagents for globular target proteins. For smaller unstructured peptides, the paratope of affibody molecules makes it more challenging to achieve a sufficiently large binding surface for high-affinity interactions. Here, we describe the development of a new type of protein scaffold based on a dimeric form of affibodies with a secondary structure content and mode of binding that is distinct from conventional affibody molecules. The interaction is characterized by encapsulation of the target peptide in a tunnel-like cavity upon binding. The new scaffold was used for construction of a high-complexity phage-displayed library and selections from the library against the amyloid beta peptide resulted in identification of high-affinity binders that effectively inhibited amyloid aggregation.
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spelling pubmed-98217332023-01-07 Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides Hjelm, Linnea Charlotta Lindberg, Hanna Ståhl, Stefan Löfblom, John Int J Mol Sci Article Affibody molecules are small affinity proteins that have excellent properties for many different applications, ranging from biotechnology to diagnostics and therapy. The relatively flat binding surface is typically resulting in high affinity and specificity when developing binding reagents for globular target proteins. For smaller unstructured peptides, the paratope of affibody molecules makes it more challenging to achieve a sufficiently large binding surface for high-affinity interactions. Here, we describe the development of a new type of protein scaffold based on a dimeric form of affibodies with a secondary structure content and mode of binding that is distinct from conventional affibody molecules. The interaction is characterized by encapsulation of the target peptide in a tunnel-like cavity upon binding. The new scaffold was used for construction of a high-complexity phage-displayed library and selections from the library against the amyloid beta peptide resulted in identification of high-affinity binders that effectively inhibited amyloid aggregation. MDPI 2023-01-03 /pmc/articles/PMC9821733/ /pubmed/36614273 http://dx.doi.org/10.3390/ijms24010836 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hjelm, Linnea Charlotta
Lindberg, Hanna
Ståhl, Stefan
Löfblom, John
Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides
title Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides
title_full Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides
title_fullStr Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides
title_full_unstemmed Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides
title_short Construction and Validation of a New Naïve Sequestrin Library for Directed Evolution of Binders against Aggregation-Prone Peptides
title_sort construction and validation of a new naïve sequestrin library for directed evolution of binders against aggregation-prone peptides
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9821733/
https://www.ncbi.nlm.nih.gov/pubmed/36614273
http://dx.doi.org/10.3390/ijms24010836
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