Transesterification of RNA model induced by novel dinuclear copper (II) complexes with bis-tridentate imidazole derivatives

Two novel bis-tridentate imidazole derivatives were conveniently synthesized using a ‘one-pot’ method. Their dinuclear (Cu 2 L 1 Cl 4 , Cu 2 L 2 Cl 4 ) and mononuclear (CuL 1 Cl 2 , CuL 2 Cl 2 ∙H 2 O) copper (II) complexes were synthesized to comparably evaluate their reactivities in the hydrolytic...

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Bibliographic Details
Published in:Journal of biological inorganic chemistry 2023-08, Vol.28 (5), p.473-483
Main Authors: Wang, Xiuyang, Shu, Jun, Ni, Tong, Xu, Chengxu, Xu, Bin, Liu, Xiaoqiang, Zhang, Kaiming, Jiang, Weidong
Format: Article
Language:English
Subjects:
Biochemistry
Biomedical and Life Sciences
Copper
Crystals
Imidazole
Inorganic chemistry
Life Sciences
Microbiology
Original Paper
p-Nitrophenylphosphate
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Summary:Two novel bis-tridentate imidazole derivatives were conveniently synthesized using a ‘one-pot’ method. Their dinuclear (Cu 2 L 1 Cl 4 , Cu 2 L 2 Cl 4 ) and mononuclear (CuL 1 Cl 2 , CuL 2 Cl 2 ∙H 2 O) copper (II) complexes were synthesized to comparably evaluate their reactivities in the hydrolytic cleavage of 2-hydroxypropyl p-nitrophenyl phosphate (HPNP) as a classic RNA model. Single crystals of Cu 2 L 1 Cl 4 and Cu 2 L 2 Cl 4 indicate that both of them are centrosymmetric, and each central copper ion is penta-coordinated. Regarding the transesterification of HPNP, both of dinuclear ones exhibited excess one order of magnitude rate enhancement in contrast with auto-hydrolysis reaction. Under comparable conditions, dinuclear complexes displayed no more than twofold increase in activity over their mononuclear analogues, which verifies the lack of binuclear cooperation effect due to long Cu-to-Cu space. Graphical Abstract
ISSN:1432-1327
0949-8257
1432-1327
DOI:10.1007/s00775-023-02000-6