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Default Water-protein hydrogen exchange in the micro-crystalline protein crh as observed by solid state NMR spectroscopy.

Water-protein hydrogen exchange in the micro-crystalline protein crh as observed by solid state NMR spectroscopy.

Related Articles Water-protein hydrogen exchange in the micro-crystalline protein crh as observed by solid state NMR spectroscopy.

J Biomol NMR. 2005 Jul;32(3):195-207

Authors: Böckmann A, Juy M, Bettler E, Emsley L, Galinier A, Penin F, Lesage A

We report site-resolved observation of hydrogen exchange in the micro-crystalline protein Crh. Our approach is based on the use of proton T2' -selective 1H-13C-13C correlation spectra for site-specific assignments of carbons nearby labile protein protons. We compare the proton T2' selective scheme to frequency selective water observation in deuterated proteins, and discuss the impacts of deuteration on 13C linewidths in Crh. We observe that in micro-crystalline proteins, solvent accessible hydroxyl and amino protons show comparable exchange rates with water protons as for proteins in solution, and that structural constraints, such as hydrogen bonding or solvent accessibility, more significantly reduce exchange rates.

PMID: 16132820 [PubMed - indexed for MEDLINE]



Source: PubMed
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