Accurate measurements of 13C-13C J-couplings in the rhodopsin chromophore by double-quantum solid-state NMR spectroscopy.
J Am Chem Soc
; 128(12): 3878-9, 2006 Mar 29.
Article
em En
| MEDLINE
| ID: mdl-16551073
A new double-quantum solid-state NMR pulse sequence is presented and used to measure one-bond 13C-13C J-couplings in a set of 13C2-labeled rhodopsin isotopomers. The measured J-couplings reveal a perturbation of the electronic structure at the terminus of the conjugated chain but show no evidence for protein-induced electronic perturbation near the C11-C12 isomerization site. This work establishes NMR methodology for measuring accurate 1JCC values in noncrystalline macromolecules and shows that the measured J-couplings may reveal local electronic perturbations of mechanistic significance.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Rodopsina
/
Ressonância Magnética Nuclear Biomolecular
Idioma:
En
Revista:
J Am Chem Soc
Ano de publicação:
2006
Tipo de documento:
Article
País de publicação:
Estados Unidos