A new fluorescent, non-cytotoxic perylene diimide derivative with two biotins at the peri position, PDI2B, has been synthesized. This molecule is able to interact selectively with G-quadruplexes with scarce or no affinity towards single-or double-stranded DNA. These features have made it possible to design a simple, effective, safe, cheap, and selective method for fishing G-quad-ruplex structures in solution by use of PDI2B and strepta-vidin coated magnetic beads. The new cyclic method reported leads to the recovery of more than 80 % of G-quadruplex structures from solution, even in the presence of an excess of single-stranded or duplex DNA as competitors. Moreover, PDI2B is a G4 ligand that can display higher thermal stabilization and greater affinity for 2-over 3-tetrad quadruplexes, which constitutes a novel type of behavior.
|Numero di pagine||5|
|Rivista||CHEMISTRY-A EUROPEAN JOURNAL|
|Stato di pubblicazione||Published - 2018|
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