Regulation of the Hydrolytic Activity of Mg2+-Dependent Phosphatase Models by Intramolecular NH路路路O Hydrogen Bonds
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- 作者：Taka-aki Okamura ; Ryosuke Furuya ; Kiyotaka Onitsuka
- 刊名：Journal of the American Chemical Society
- 出版年：2014
- 出版时间：October 22, 2014
- 年：2014
- 卷：136
- 期：42
- 页码：14639-14641
- 全文大小：263K
- ISSN：1520-5126
文摘
Magnesium-dependent phosphatase models containing intramolecular NH路路路O hydrogen bonds were synthesized and structurally characterized by X-ray analysis. The Mg鈥揙 bond distances varied with the mode of the hydrogen bonds. 1H NMR spectra in nonpolar solvents revealed that the acidity of the coordinated water molecule was regulated by the hydrogen bonds. Further, stoichiometric hydrolysis of phosphoric ester significantly depended on the hydrogen bonds. Zinc analogues showed similar but smaller dependencies, which suggest the indispensable role of Mg2+ ion in the activation of the enzymes.