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- W4361762023 abstract "In order to overcome the pH limitations of triplex-forming peptide nucleic acid (PNA) in binding to double-stranded RNA (dsRNA), we have recently proposed a new design of triplex-forming PNA-based fluorogenic probes that work at neutral pH for sensing the panhandle structure of the influenza A virus (IAV) RNA promoter region. Our strategy is based on the conjugation of a small molecule (DPQ) capable of selectively binding to the internal loop structure with the triplex-forming forced intercalation of thiazole orange (tFIT) probe with natural PNA nucleobases. In this work, the triplex formation of tFIT-DPQ conjugate probes with IAV target RNA at neutral pH was examined by means of a stopped-flow technique UV melting and fluorescence titration experiments. The obtained results revealed that (i) the conjugation strategy is responsible for the observed strong binding affinity due to a very fast association rate constant and a slow dissociation rate constant; (ii) the binding follows a pattern of the DPQ unit binding first to the internal loop region, followed by the tFIT unit binding to the complementary dsRNA region. Our results emphasize the importance of both the tFIT and the DPQ components of the conjugate probe design and revealed an association mechanism for the tFIT-DPQ probe-dsRNA triplex formation towards the IAV RNA at neutral pH." @default.
- W4361762023 created "2023-04-04" @default.
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- W4361762023 date "2023-01-01" @default.
- W4361762023 modified "2023-09-26" @default.
- W4361762023 title "Kinetic analysis of highly effective triplex formation between a small molecule–peptide nucleic acid conjugate probe and the influenza A virus RNA promoter region at neutral pH" @default.
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- W4361762023 doi "https://doi.org/10.1039/d3ob00262d" @default.
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