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Kamiya Y, Lao S, Ariyoshi J, Sato F, Asanuma H. Unexpectedly stable homopurine parallel triplex of SNA:RNA*SNA and L- aTNA:RNA*L- aTNA. Chem Commun (Camb) 2024; 60:1257-1260. [PMID: 38175608 DOI: 10.1039/d3cc05555h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Homopurine strands are known to form antiparallel triplexes stabilized by G*G and A*A Hoogsteen pairs, which have two hydrogen bonds. But there has been no report on the parallel triplex formation of homopurine involving both adenosine and guanosine to the duplex. In this paper, we first report parallel triplex formation between a homopurine serinol nucleic acid (SNA) strand and an RNA/SNA duplex. Melting profiles revealed that the parallel SNA:RNA*SNA triplex was remarkably stable, even though the A*A pair has a single hydrogen bond. An L-acyclic threoninol nucleic acid (L-aTNA) homopurine strand also formed a stable parallel triplex with an L-aTNA/RNA duplex.
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Affiliation(s)
- Yukiko Kamiya
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
- Laboratory of Bioanalytical Chemistry, Kobe Pharmaceutical University, Higashinada-Ku, Kobe, 658-8558, Japan.
- Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
| | - Siyuan Lao
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
| | - Jumpei Ariyoshi
- Laboratory of Bioanalytical Chemistry, Kobe Pharmaceutical University, Higashinada-Ku, Kobe, 658-8558, Japan.
| | - Fuminori Sato
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
| | - Hiroyuki Asanuma
- Department of Biomolecular Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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