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Agarwal, V.* ; Linser, R.* ; Dasari, M. ; Fink, U.* ; Lopez del Amo, J.M. ; Reif, B.

Hydrogen bonding involving side chain exchangeable groups stabilizes amyloid quarternary structure.

Phys. Chem. Chem. Phys. 15, 12551-12557 (2013)
DOI Verlagsversion bestellen
Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
The amyloid beta-peptide (A beta) is the major structural component of amyloid fibrils in the plaques of brains of Alzheimer's disease patients. Numerous studies have addressed important aspects of secondary and tertiary structure of fibrils. In electron microscopic images, fibrils often bundle together. The mechanisms which drive the association of protofilaments into bundles of fibrils are not known. We show here that amino acid side chain exchangeable groups like e. g. histidines can provide useful restraints to determine the quarternary assembly of an amyloid fibril. Exchangeable protons are only observable if a side chain hydrogen bond is formed and the respective protons are protected from exchange. The method relies on deuteration of the A beta peptide. Exchangeable deuterons are substituted with protons, before fibril formation is initiated.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Solid-state Nmr ; Perdeuterated Proteins ; Alzheimers-disease ; Correlation Spectroscopy ; Experimental Constraints ; Membrane-proteins ; Beta-protein ; Fibrils ; Resolution ; A-beta(1-40)
ISSN (print) / ISBN 0956-5000
e-ISSN 1364-5455
Quellenangaben Band: 15, Heft: 30, Seiten: 12551-12557 Artikelnummer: , Supplement: ,
Verlag Royal Society of Chemistry (RSC)
Begutachtungsstatus Peer reviewed