Structure Determination of the Pb2+-specific GT Aptamer Using SAXS and Molecular Modeling Methods

Aptamer GT conjugated with gold nanoparticles is specific for heavy metal ions and can
\nbe used for water quality control and environmental monitoring. Circular dichroism (CD) and small-
\nangle X-ray scattering (SAXS) measurements were performed to determine the structure of the aptamer
\ncomplex with lead (II) ions. Comparison of the measurement results with different options of the spatial
\nstructure of the complexes obtained using molecular modeling allowed us to determine how the aptamer
\nchanges its conformation due to interacting with the target