Amado Torres, Diego and Garzoni, Matteo and Subrahmanyam, Ayyagari V and Pavan, Giovanni Maria and Thayumanavan, S (2014) Protein-triggered supramolecular disassembly: insights based on variations in ligand location in amphiphilic dendrons. Journal of the American Chemical Society, 136 (14). pp. 5385-5399. ISSN 0002-7863
Full text not available from this repository.Abstract
We use monodisperse dendrons that allow control over functional group presentation to investigate the influence of the location of a ligand on protein-induced disassembly and release of encapsulated small molecules. Based on both experiments and molecular dynamics simulations, we demonstrate that ligand location greatly influences release of guest molecules from the dendron-based supramolecular assembly. We show that a ligand moiety grafted to the dendron periphery is more accessible for the target protein in aqueous solution. On the other hand, the ligand moiety placed at the focal point or at the intermediate layer within the dendritic scaffold is less accessible, since it is surrounded by an environment rich in PEG chains, which hinders binding and even influences nonspecific interactions. We also demonstrate that the specific binding between one ligand and the target protein can destabilize the dendritic assembly. Furthermore, if more ligands are available, multivalent interactions are also possible with extravidin, which speed up disassembly and trigger the release of hydrophobic guests.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Subjects: | Physical sciences > Chemistry |
| Depositing User: | Giovanni Maria Pavan |
| Date Deposited: | 23 Aug 2016 06:11 |
| Last Modified: | 23 Aug 2016 06:11 |
| URI: | http://repository.supsi.ch/id/eprint/7647 |
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