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  4. Multivalent Pattern Recognition through Control of Nano-Spacing in Low-Valency Super-Selective Materials
 
research article

Multivalent Pattern Recognition through Control of Nano-Spacing in Low-Valency Super-Selective Materials

Bila, Hale  
•
Paloja, Kaltrina  
•
Caroprese, Vincenzo  
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November 16, 2022
Journal Of The American Chemical Society

Super-selective multivalent ligand-receptor interactions display a signature step-like onset in binding when meeting a characteristic density of target receptors. Materials engineered for super-selective binding generally display a high number of flexible ligands to enhance the systems' avidity. In many biological processes, however, ligands are present in moderate copy numbers and arranged in spatio-temporal patterns. In this low-valency regime, the rigidity of the ligand-presenting architecture plays a critical role in the selectivity of the multivalent complex through decrease of the entropic penalty of binding. Exploiting the precision in spatial design inherent to the DNA nanotechnology, we engineered a library of rigid architectures to explore how valency, affinity, and nano-spacing control the presence of super-selectivity in multivalent binding. A micromolar monovalent affinity was required for super-selective binding to be observed within low-valency systems, and the transition point for stable interactions was measured at hexavalent ligand presentation, setting the limits of the low valency regime. Super-selective binding was observed for all hexavalent architectures, and, more strikingly, the ligand pattern determined the selectivity onset. Hereby, we demonstrate for the first time that nano-control of geometric patterns can be used to discriminate between receptor densities in a super-selective manner. Materials that were indistinguishable in their molecular composition and ligand valency bound with various efficacies on surfaces with constant receptor densities. We define this new phenomenon in super-selective binding as multivalent pattern recognition.

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Type
research article
DOI
10.1021/jacs.2c08529
Web of Science ID

WOS:000886697700001

Author(s)
Bila, Hale  
Paloja, Kaltrina  
Caroprese, Vincenzo  
Kononenko, Artem  
Bastings, Maartje M. C.  
Date Issued

2022-11-16

Publisher

AMER CHEMICAL SOC

Published in
Journal Of The American Chemical Society
Subjects

Chemistry, Multidisciplinary

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Chemistry

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weak-interactions

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folding dna

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receptor

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ligands

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binding

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recombination

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organization

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affinity

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density

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peptide

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

Available on Infoscience
December 5, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/192913
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