3 years ago

Cytosine–Cytosine Base-Pair Mismatch and Chirality in Nucleotide Supramolecular Coordination Complexes

Cytosine–Cytosine Base-Pair Mismatch and Chirality in Nucleotide Supramolecular Coordination Complexes
Liang Hao, Hui Li, Qi-ming Qiu, Pei Zhou, Leilei Gu, Minghua Liu
The base-pair sequences are the foundation for the biological processes of DNA or RNA, and base-pair mismatch is very important to reveal genetic diseases and DNA rearrangements. However, the lack of well-defined structural information about base-pair mismatch is obstructing the investigation of this issue. The challenge is to crystallize the materials containing the base-pair mismatch. Engineering the small-molecule mimics or model is an effective strategy to solve this issue. Here, six cytidine-5′-monophosphate (CMP) and 2′-deoxycytidine-5′-monophosphate (dCMP) coordination polymers were reported containing cytosine–cytosine base-pair mismatch (i-motif), and their single-crystal structures and chiralities were studied. The precise control over the formation of the i-motif was demonstrated, in which the regulating of supramolecular interactions was achieved based on molecular design. In addition, the chiralities of these coordination polymers were investigated according to their crystal structures and solution- and solid-state circular dichroism spectroscopy. i-motif: A well-defined crystal structure of the i-motif is constructed in the cytidine-5′-monophosphate (CMP) and 2′-deoxycytidine-5′-monophosphate (dCMP) supramolecular coordination polymers, in which the regulating of supramolecular interactions is achieved based on molecular design, and the relative supramolecular chirality is discussed.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201700930

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