Multivalent Weak Interactions Enhance Selectivity of Interparticle Binding
Overview
Affiliations
Targeted drug delivery critically depends on the binding selectivity of cargo-transporting colloidal particles. Extensive theoretical work has shown that two factors are necessary to achieve high selectivity for a threshold receptor density: multivalency and weak interactions. Here, we study a model system of DNA-coated particles with multivalent and weak interactions that mimics ligand-receptor interactions between particles and cells. Using an optomagnetic cluster experiment, particle aggregation rates are measured as a function of ligand and receptor densities. The measured aggregation rates show that the binding becomes more selective for shorter DNA ligand-receptor pairs, proving that multivalent weak interactions lead to enhanced selectivity in interparticle binding. Simulations confirm the experimental findings and show the role of ligand-receptor dissociation in the selectivity of the weak multivalent binding.
In situ enzymatic control of colloidal phoresis and catalysis through hydrolysis of ATP.
Shandilya E, Rallabandi B, Maiti S Nat Commun. 2024; 15(1):3603.
PMID: 38684662 PMC: 11059368. DOI: 10.1038/s41467-024-47912-2.
Modulating the folding and binding of peptides using a stimuli-responsive molecular tweezer.
Ko S, Kim J, Yeon Park J, Jung Y, Choi M, Jin K Chem Sci. 2023; 14(35):9600-9607.
PMID: 37712040 PMC: 10498507. DOI: 10.1039/d3sc03758d.
Whole-genome detection using multivalent DNA-coated colloids.
Xu P, Cao T, Fan Q, Wang X, Ye F, Eiser E Proc Natl Acad Sci U S A. 2023; 120(37):e2305995120.
PMID: 37669392 PMC: 10500262. DOI: 10.1073/pnas.2305995120.
Flexible Colloidal Molecules with Directional Bonds and Controlled Flexibility.
Shelke Y, Camerin F, Marin-Aguilar S, Verweij R, Dijkstra M, Kraft D ACS Nano. 2023; 17(13):12234-12246.
PMID: 37363931 PMC: 10339793. DOI: 10.1021/acsnano.3c00751.
The Role of Receptor Uniformity in Multivalent Binding.
Xia X, Zhang G, Pica Ciamarra M, Jiao Y, Ni R JACS Au. 2023; 3(5):1385-1391.
PMID: 37234107 PMC: 10207130. DOI: 10.1021/jacsau.3c00052.