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6th Euro Virology Congress and Expo

Madrid, Spain

Kunihiro Kaihatsu

Kunihiro Kaihatsu

Osaka University, Japan

Title: Sequence Specific Detection Of Rna Viral Gene By Chemically Modified Peptide Nucleic Acid


Biography: Kunihiro Kaihatsu


Molecular tools that can rapidly identify virus in clinical specimen are important for achieving therapeutic success and preventing the spread of infectious diseases. Peptide nucleic acid (PNA) is a DNA/RNA analogue that possesses a neutral amide backbone instead of phosphate backbone and thus efficiently binds to DNA without having electrostatic repulsion. Currently, we synthesized PNAs derivatized with different types of intercalators via an amide linkage at the N-terminus. Their intercalators increased PNA binding affinity to matched DNA; however, most of them also increased the binding efficiency to mismatched DNA. On the other hand, PNA derivatives with tolane selectively improve the binding affinity to the matched sequence, but not to the mismatched sequence. In this paper, we synthesized a series of PNA-tolane conjugates and measured UV melting temperature (Tm) with target ssDNA and ssRNA. Molecular dynamics simulations and thermodynamic studies were also performed to discuss the mode of actions of PNA-tolane derivatives against ssDNA and ssRNA. PNA-tolanes were also used to discriminate a neuraminidase inhibitor-resistant influenza A virus gene on our novel type of nucleic acid chromatography system.