Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12779/5939
Title: Hydration studies on the archaeal protein Sso7d using NMR measurements and MD simulations.
Authors: Bernini, A
Spiga, Ottavia 
Consonni, R
Arosio, I
Fusi, P
Cirri, S
Guagliardi, A
Niccolai, Neri 
Issue Date: 2011
Project: None 
Journal: BMC STRUCTURAL BIOLOGY
Abstract: 
Abstract Background: How proteins approach surrounding molecules is fundamental to our understanding of the specific interactions that occur at the surface of proteins. The enhanced surface accessibility of small molecules such as organic solvents and paramagnetic probes to protein binding sites has been observed; however, the molecular basis of this finding has not been fully established. Recently, it has been suggested that hydration dynamics play a predominant role in controlling the distribution of hot spots on surface of proteins. Results: In the present study, the hydration of the archaeal multifunctional protein Sso7d from Solfolobus solfataricus was investigated using a combination of computational and experimental data derived from molecular dynamics simulations and ePHOGSY NMR spectroscopy. Conclusions: We obtained a convergent protein hydration landscape that indicated how the shape and stability of the Sso7d hydration shell could modulate the function of the protein. The DNA binding domain overlaps with the protein region involved in chaperon activity and this domain is hydrated only in a very small central region. This localized hydration seems to favor intermolecular approaches from a large variety of ligands. Conversely, high water density was found in surface regions of the protein where the ATP binding site is located, suggesting that surface water molecules play a role in protecting the protein from unspecific interactions.
Description: 
7176
URI: http://hdl.handle.net/20.500.12779/5939
ISSN: 1472-6807
DOI: 10.1186/1472-6807-11-44
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