Download MendeleySpatial Matching Selectivity and Solution Structure of Organic-Metal Hybrid to Quadruplex-Duplex Hybrid.
Liu, L.Y., Wang, K.N., Liu, W., Zeng, Y.L., Hou, M.X., Yang, J., Mao, Z.W.(2021) Angew Chem Int Ed Engl 60: 20833-20839
- PubMed: 34288320 Search on PubMed
- DOI: https://doi.org/10.1002/anie.202106256
- Primary Citation Related Structures:
7EL7 - PubMed Abstract:
The sequence-dependent DNA secondary structures possess structure polymorphism. To date, studies on regulated ligands mainly focus on individual DNA secondary topologies, while lack focus on quadruplex-duplex hybrids (QDHs). Here, we design an organic-metal hybrid ligand L 1 Pt(dien), which matches and selectively binds one type of QDHs with lateral duplex stem-loop (QLDH) with high affinity, while shows poor affinity for other QDHs and individual G4 or duplex DNA. The solution structure of QLDH MYT1L-L 1 Pt(dien) complex was determined by NMR. The structure reveals that L 1 Pt(dien) presents a chair-type conformation, whose large aromatic "chair surface" intercalates into the G-quadruplex-duplex interface via π-π stacking and "backrest" platinum unit interacts with duplex region through hydrogen bonding and electrostatic interactions, showing a highly matched lock-key binding mode. Our work provided guidance for spatial matching design of selectively targeting ligands to QDH structures.
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, Guangzhou, 510275, P. R. China.
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