NMR paper Towards structure determination of neurotoxin II bound to nicotinic acetylcholine rec

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[NMR paper] Towards structure determination of neurotoxin II bound to nicotinic acetylcholine rec

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11-24-2010, 09:51 PM

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Towards structure determination of neurotoxin II bound to nicotinic acetylcholine rec

Towards structure determination of neurotoxin II bound to nicotinic acetylcholine receptor: a solid-state NMR approach.

Related Articles Towards structure determination of neurotoxin II bound to nicotinic acetylcholine receptor: a solid-state NMR approach.

FEBS Lett. 2004 Apr 30;564(3):319-24

Authors: Krabben L, van Rossum BJ, Castellani F, Bocharov E, Schulga AA, Arseniev AS, Weise C, Hucho F, Oschkinat H

Solid-state magic-angle spinning nuclear magnetic resonance (NMR) has sufficient resolving power for full assignment of resonances and structure determination of immobilised biological samples as was recently shown for a small microcrystalline protein. In this work, we show that highly resolved spectra may be obtained from a system composed of a receptor-toxin complex. The NMR sample used for our studies consists of a membrane preparation of the nicotinic acetylcholine receptor from the electric organ of Torpedo californica which was incubated with uniformly 13C-,15N-labelled neurotoxin II. Despite the large size of the ligand-receptor complex ( > 290 kDa) and the high lipid content of the sample, we were able to detect and identify residues from the ligand. The comparison with solution NMR data of the free toxin indicates that its overall structure is very similar when bound to the receptor, but significant changes were observed for one isoleucine.

PMID: 15111116 [PubMed - indexed for MEDLINE]

Source: PubMed

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