Penkov, N. V., N. A. Penkova, and V. I. Lobyshev. "Special Role of Mg2+ in the Formation of the Hydration Shell of Adenosine Triphosphate." Physics of Wave Phenomena 30, no. 5 (2022): 344-350.
Abstract
The hydration of adenosine triphosphate (ATP), Mg · ATP, and Ca · ATP in aqueous solutions has been analyzed based on the Terahertz Time-Domain Spectroscopy and Dynamic Light Scattering data. It is shown that the ATP binding with Mg2+ or Ca2+ leads to weakening of water binding in the hydration shell (apparently, due to the screening of the phosphate-group charge). It is also shown that an increased number of hydrogen bonds are formed in the hydration shells of Mg · ATP, which is not the case for ATP and Ca · ATP. The hydrodynamic diameter of Mg · ATP exceeds that of ATP and Ca · ATP, which is in agreement with the conclusion about the larger number of hydrogen bonds in the Mg · ATP hydration shell. The special role of Mg2+ in the ATP hydration may have a deep biological sense, because ATP is involved in most of biologically significant reactions specifically in the form of Mg · ATP complex.
for full paper see https://link.springer.com/article/10.3103/S1541308X22050090
… The spectra in the THz range were recorded on a TPS Spectra3000 (Teraview, UK) spectrometer. The THz-TDS method is known in detail; its description can be found, eg, in [29]. This method makes it possible to record simultaneously the …
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