期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 144, 期 7, 页码 2867-2872出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c12799
关键词
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资金
- U.S. National Science Foundation [CHE-1904560]
- Sloan Foundation
- U.S. Department of Energy [DE-SC0018020]
- Ohio State University Department of Chemistry and Biochemistry
- U.S. Department of Energy (DOE) [DE-SC0018020] Funding Source: U.S. Department of Energy (DOE)
The interconversion between metal-S-nitrosothiol adduct and metal nitrosyl thiolate complex can regulate the direction of reversible S-(de)nitrosation. This process is sensitive to temperature, solvent coordination ability, and counterions, and copper centers can modulate the bond formation and cleavage through minor perturbations of the local environment.
Iron and copper enzymes are known to promote reversible S-nitrosation/denitrosation in biology. However, it is unclear how the direction of S-N bond formation/scission is controlled. Herein, we demonstrate the interconversion of metal-S-nitrosothiol adduct M(RSNO) and metal nitrosyl thiolate complex M(NO)(SR), which may regulate the direction of reversible S-(de)nitrosation. Treatment of a dicopper(I,I) complex with RSNO leads to a mixture of two structural isomers: dicopper(I,I) Snitrosothiol [(CuCuI)-Cu-I(RSNO)](2+) and dicopper(II,II) nitrosyl thiolate [(CuCuII)-Cu-II(NO)(SR)](2+). The K-eq between these two structural isomers is sensitive to temperature, the solvent coordination ability, and counterions. Our study illustrates how copper centers can modulate the direction of RS-NO bond formation and cleavage through a minor perturbation of the local environment.
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