Mapping hydrophobic molecular regions using dissolved laser-polarized xenon NMR

Lionel Dubois; Patrick Berthault; J.Gaspard Huber; Hervé Desvaux

doi:10.1016/j.crhy.2004.02.003

Mapping hydrophobic molecular regions using dissolved laser-polarized xenon NMR
[Cartographie des régions moléculaires hydrophobes par RMN du xénon polarisé par laser dissous]

Présenté par : Guy Laval

Lionel Dubois ¹ ; Patrick Berthault ¹ ; J.Gaspard Huber ¹ ; Hervé Desvaux ¹

¹ Laboratoire commun de RMN, DSM/DRECAM/service de chimie moléculaire, URA CEA/CNRS 331 Claude Fréjacques, CEA/Saclay, 91191 Gif-sur-Yvette, France

Comptes Rendus. Physique, Volume 5 (2004) no. 3, pp. 305-313.

Résumé
Abstract

Les régions moléculaires hydrophobes peuvent être localisées par l'approche appelée SPINOE qui consiste en la détection des transferts d'aimantation du xénon polarisé par laser dissous vers les protons proches du soluté. Nous rapportons l'étude de la dynamique présente lors de cette expérience et discutons les conséquences sur son implémentation. Nous montrons que la connaissance des propriétés physico-chimiques du système permet de choisir les meilleures conditions expérimentales afin d'être capable d'identifier les transferts d'aimantation via des expériences de RMN à deux dimensions. Nous illustrons ce résultat par le premier spectre de SPIROE-TOCSY.

Molecular hydrophobic cavities can be mapped thanks to the detection of magnetization transfer from laser polarized xenon to nearby protons. This so called SPINOE approach is described. The study of the spin dynamics during this experiment and its consequences on the practical implementation are detailed. We show that thanks to the knowledge of the physical properties of the system, it becomes possible to choose the best experimental conditions in order to be able to assign magnetization transfer through two dimensional NMR methods. As an illustration, the first 2D SPIROE-TOCSY experiment is reported.

Publié le : 2004-04-01

DOI : 10.1016/j.crhy.2004.02.003

Keywords: NMR, Laser polarized xenon, SPINOE, Protein hydrophobic cavity
Mot clés : RMN, Xénon polarisé par laser, SPINOE, Cavité hydrophobe de protéines

Affiliations des auteurs :

Lionel Dubois ¹ ; Patrick Berthault ¹ ; J.Gaspard Huber ¹ ; Hervé Desvaux ¹

¹ Laboratoire commun de RMN, DSM/DRECAM/service de chimie moléculaire, URA CEA/CNRS 331 Claude Fréjacques, CEA/Saclay, 91191 Gif-sur-Yvette, France

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     author = {Lionel Dubois and Patrick Berthault and J.Gaspard Huber and Herv\'e Desvaux},
     title = {Mapping hydrophobic molecular regions using dissolved laser-polarized xenon {NMR}},
     journal = {Comptes Rendus. Physique},
     pages = {305--313},
     publisher = {Elsevier},
     volume = {5},
     number = {3},
     year = {2004},
     doi = {10.1016/j.crhy.2004.02.003},
     language = {en},
}

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Lionel Dubois; Patrick Berthault; J.Gaspard Huber; Hervé Desvaux. Mapping hydrophobic molecular regions using dissolved laser-polarized xenon NMR. Comptes Rendus. Physique, Volume 5 (2004) no. 3, pp. 305-313. doi : 10.1016/j.crhy.2004.02.003. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2004.02.003/

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