title: Supramolecular arrangement of guanosine/5-guanosine monophosphate binary mixtures studied by methods of circular dichroism.
abstract: Self-assembly of molecules is one of the fundamental processes in biology and in supramolecular chemistry. Guanosine (Guo) and its derivatives are among the widely studied molecules because of self-assembly abilities. Their tetrameric associates are the nature of telomeric DNA, and furthermore they are fundamental building blocks of supramolecular reversible gels, which may arise in certain physical and chemical conditions. Although poorly soluble in water, Guo forms interesting structures with guanosine 5'-monophosphate salt (GMP) in the TRIS buffer. We used electronic circular dichroism and vibrational circular dichroism to describe the thermal response of gels formed by the Guo/GMP binary mixture. Using these complementary techniques suitable to study conformational changes of chiral compounds, we obtained information about the involvement of functional groups and weak interactions in the guanosine quartet (G(4)) and stacked G(4) structures.
authors.affiliation: Department of Analytical Chemistry, Institute of Chemical Technology, Prague, Prague 6, Czech Republic.
authors.forename: Jana
authors.initials: J
authors.lastname: Novotná
authors.forename: Iryna
authors.initials: I
authors.lastname: Goncharova
authors.forename: Marie
authors.initials: M
authors.lastname: Urbanová
mesh_terms: D002942:Circular Dichroism; D006151:Guanosine / Q000737:chemistry*; D006157:Guanosine Monophosphate / Q000737:chemistry*; D008958:Models, Molecular; D013696:Temperature
chemical_list: D006151:Guanosine; D006157:Guanosine Monophosphate