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Old 11-19-2010, 08:29 PM
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Default Protein hydration and location of water molecules in oxidized horse heart cytochrome

Protein hydration and location of water molecules in oxidized horse heart cytochrome c by (1)H NMR.

Related Articles Protein hydration and location of water molecules in oxidized horse heart cytochrome c by (1)H NMR.

J Magn Reson. 2000 Nov;147(1):1-8

Authors: Bertini I, Huber JG, Luchinat C, Piccioli M

The hydration properties of the oxidized form of horse heart cytochrome c have been studied by (1)H NMR spectroscopy. Two-dimensional, homonuclear ePHOGSY-NOESY experiments are used to map water-protein interactions. The detected NOEs reveal interactions between nonexchangeable protein protons and both water protons and labile protein protons which exchange with water protons. Among the many water molecules apparent in the X-ray structure, three have been identified with a residence time longer than 300 ps. One of them is located inside the distal heme cavity, in the deepest part of a hydration pathway extending toward the surface. The identification of hydrophilic regions and detection of three long-lived water molecules settles some ambiguities and provides a better representation of the water-protein interactions in oxidized cytochrome c.

PMID: 11042041 [PubMed - indexed for MEDLINE]



Source: PubMed
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