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Investigation of the Stereochemical-Dependent DNA and RNA Binding of Arginine-Based Nucleopeptides
oleh: Stefano Tomassi, Francisco Franco Montalban, Rosita Russo, Ettore Novellino, Anna Messere, Salvatore Di Maro
Format: | Article |
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Diterbitkan: | MDPI AG 2019-04-01 |
Deskripsi
Nucleopeptides represent an intriguing class of nucleic acid analogues, in which nucleobases are placed in a peptide structure. The incorporation of D- and/or L-amino acids in nucleopeptide molecules allows the investigation of the role of backbone stereochemistry in determining the formation of DNA and RNA hybrids. Circular Dichroism (CD) spectroscopic studies indicated the nucleopeptide as having fully <span style="font-variant: small-caps;">l</span>-backbone configuration-formed stable hybrid complexes with RNA molecules. Molecular Dynamics (MD) simulations suggested a potential structure of the complex resulting from the interaction between the <span style="font-variant: small-caps;">l</span>-nucleopeptide and RNA strand. From this study, both the backbone (ionics and H-bonds) and nucleobases (pairing and π-stacking) of the chiral nucleopeptide appeared to be involved in the hybrid complex formation, highlighting the key role of the backbone stereochemistry in the formation of the nucleopeptide/RNA complexes.