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Publication Abstract from PubMed

Metallo-base pairs have been extensively studied for applications in nucleic acid-based nanodevices and genetic code expansion. Metallo-base pairs composed of natural nucleobases are attractive because nanodevices containing natural metallo-base pairs can be easily prepared from commercially available sources. Previously, we have reported a crystal structure of a DNA duplex containing THgII T base pairs. Herein, we have determined a high-resolution crystal structure of the second natural metallo-base pair between pyrimidine bases CAgI C formed in an RNA duplex. One AgI occupies the center between two cytosines and forms a CAgI C base pair through N3AgI N3 linear coordination. The CAgI C base pair formation does not disturb the standard A-form conformation of RNA. Since the CAgI C base pair is structurally similar to the canonical Watson-Crick base pairs, it can be a useful building block for structure-based design and fabrication of nucleic acid-based nanodevices.

High-Resolution Crystal Structure of Silver(I)-RNA Hybrid Duplex Containing Watson-Crick-like CSilver(I)C Metallo-Base Pairs.,Kondo J, Tada Y, Dairaku T, Saneyoshi H, Okamoto I, Tanaka Y, Ono A Angew Chem Int Ed Engl. 2015 Oct 8. doi: 10.1002/anie.201507894. PMID:26448329^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.