title: Patchy supramolecules as versatile tools to probe hydrophobicity in nanoglobular systems.
abstract: We describe precise supramolecules that enable the evaluation of the effective hydrophobicity of amphiphilic or "patchy" nanoglobular systems. These supramolecules exhibit the lower critical solution temperature phenomenon, which provides a quantitative measure of their effective hydrophobicity. Specifically, two isomeric 8-aryl-2'-deoxyguanosine derivatives with a transposed pair of methylene groups self-assemble into hexadecameric nanoglobular supramolecular G-quadruplexes (SGQs) that show large differences in their transition temperatures as determined by turbidity and differential scanning calorimetry studies. Molecular modeling studies suggested that differential clustering of the hydrophobic patches on the surface is responsible for the striking differences between the two isomeric supramolecules.
authors: Department of Chemistry, University of Puerto Rico, Río Piedras Campus, Río Piedras, Puerto Rico 00931.
authors: Luis M
authors: LM
authors: Negrón
authors: Yazmary
authors: Y
authors: Meléndez-Contés
authors: José M
authors: JM
authors: Rivera
mesh_terms: D003849:Deoxyguanosine / Q000031:analogs & derivatives / Q000737:chemistry; D054856:G-Quadruplexes; D057927:Hydrophobic and Hydrophilic Interactions; D046911:Macromolecular Substances / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D013499:Surface Properties; D044366:Transition Temperature
chemical_list: D046911:Macromolecular Substances; D003849:Deoxyguanosine