New G-quadruplex-forming oligodeoxynucleotides incorporating a bifunctional Double-Ended Linker (DEL): effects of DEL size and ODNs orientation on the topology, stability and molecularity of DEL-G-quadruplexes
New G-quadruplex-forming oligodeoxynucleotides incorporating a bifunctional Double-Ended Linker (DEL): effects of DEL size and ODNs orientation on the topology, stability and molecularity of DEL-G-quadruplexes(12 visite) Marzano M, Falanga AP, D'Errico S, Pinto B, Roviello GN, Piccialli G, Oliviero G, Borbone N
G-quadruplexes (G4s) are unusual secondary structures of DNA occurring in guanosine-rich oligodeoxynucleotide (ODN) strands that are extensively studied for their relevance to the biological processes in which they are involved. In this study, we report the synthesis of a new kind of G4-forming molecule named double-ended-linker ODN (DEL-ODN), in which two TG4T strands are attached to the two ends of symmetric, non-nucleotide linkers. Four DEL-ODNs differing for the incorporation of either a short or long linker and the directionality of the TG4T strands were synthesized, and their ability to form G4 structures and/or multimeric species was investigated by PAGE, HPLC–size-exclusion chromatography (HPLC–SEC), circular dichroism (CD), and NMR studies in comparison with the previously reported monomeric tetra-ended-linker (TEL) analogues and with the corresponding tetramolecular species (TG4T)4. The structural characterization of DEL-ODNs confirmed the formation of stable, bimolecular DEL-G4s for all DEL-ODNs, as well as of additional DEL-G4 multimers with higher molecular weights, thus suggesting a way towards the obtainment of thermally stable DNA nanostructures based on reticulated DEL-G4s
41 Records (38 escludendo Abstract e Conferenze). Impact factor totale: 187.908 (179.135 escludendo Abstract e Conferenze). Impact factor a 5 anni totale: 191.982 (182.429 escludendo Abstract e Conferenze).