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Design and Hybridization Properties of Acyclic Xeno Nucleic Acid Oligomers
Keiji Murayama1, Hiroyuki Asanuma1
1Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
Abstract:
Xeno nucleic acids (XNAs) are analogues of DNA and RNA that have a non-ribose artificial scaffold. XNAs are possible prebiotic genetic carriers as well as alternative genetic systems in artificial life. In addition, XNA oligomers can be used as biological tools. Acyclic XNAs, which do not have cyclic scaffolds, are attractive due to facile their synthesis and remarkably high nuclease resistance. To maximize the performance of XNAs, a negatively charged backbone is preferable to provide sufficient water solubility; however, acyclic XNAs containing polyanionic backbones suffer from high entropy cost upon duplex formation, because of the high flexibility of the acyclic nature. Herein, we review the relationships between the structure and duplex hybridization properties of various acyclic XNA oligomers with polyanion backbones.
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