Biosilica-Entrapped Enzymes Studied by Using Dynamic Nuclear-Polarization-Enhanced High-Field NMR Spectroscopy.
Chemphyschem. 2015 Aug 12;
Authors: Ravera E, Michaelis VK, Ong TC, Keeler EG, Martelli T, Fragai M, Griffin RG, Luchinat C
Abstract
Enzymes are used as environmentally friendly catalysts in many industrial applications, and are frequently immobilized in a matrix to improve their chemical stability for long-term storage and reusability. Recently, it was shown that an atomic-level description of proteins immobilized in a biosilica matrix can be attained by examining their magic-angle spinning (MAS) NMR spectra. However, even though MAS NMR is an excellent tool for determining structure, it is severely hampered by sensitivity. In this work we provide the proof of principle that NMR characterization of biosilica-entrapped enzymes could be assisted by high-field dynamic nuclear polarization (DNP).
PMID: 26266832 [PubMed - as supplied by publisher]
[NMR paper] NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field.
NMR-based structural biology enhanced by dynamic nuclear polarization at high magnetic field.
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Abstract
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Abstract
Dynamic nuclear polarization (DNP) has become a powerful method to enhance spectroscopic sensitivity in the context of magnetic resonance imaging and nuclear magnetic resonance spectroscopy. We show that, compared to DNP at lower field (400Â*MHz/263Â*GHz), high field DNP (800Â*MHz/527Â*GHz) can significantly enhance spectral resolution and allows exploitation of the paramagnetic relaxation properties of DNP polarizing agents as direct structural...
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Anne Lesage, Moreno Lelli, David Gajan, Marc A. Caporini, Veronika Vitzthum, Pascal Mie?ville, Johan Alauzun, Arthur Roussey, Chloe? Thieuleux, Ahmad Medhi, Geoffrey Bodenhausen, Christophe Cope?ret and Lyndon Emsley
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/0/jacsat.ahead-of-print/ja104771z/aop/images/medium/ja-2010-04771z_0004.gif
Journal of the American Chemical Society
DOI: 10.1021/ja104771z
http://feeds.feedburner.com/~ff/acs/jacsat?d=yIl2AUoC8zA...