%0 Journal Article %J Solid State Nuclear Magnetic Resonance %D 2006 %T Solid-state NMR structural studies of the fibril form of a mutant mouse prion peptide PrP89-143(P101L) %A Lim, K. H. %A Nguyen, T. N. %A Damo, S. M. %A Mazur, T. %A Ball, H. L. %A Prusiner, S. B. %A Pines, A. %A Wemmer, D. E. %K identification %X

The peptide fragment 89-143 of the prion protein (carrying a P101L mutation) is biologically active in transgenic mice when in a fibrillar form. Injection of these fibrils into transgenic mice (expressing full length PrP with the P101L mutation) induces a neurodegenerative prion disease (Kaneko et al., J. Mol. Biol. 295 (2000) 997). Here we present solid-state NMR studies of PrP89-143(P101L) fibrils, probing the conformation of residues in the hydrophobic segment 112-124 with chemical shifts. The conformations of glycine residues were analyzed using doubly C-13 = 0 labeled peptides by two-dimensional (2D) double-quantum correlation, and double-quantum filtered dephasing distance measurements. MQ-NMR experiments were carried out to probe the relative alignment of the individual peptides fibrils. These NMR studies indicate that the 112-124 segment adopts an extended beta-sheet conformation, though not in a parallel, in register alignment. There is evidence for conformational variability at Gly 113. DQ correlation experiments provide useful information in regions with conformational heterogeneity. (c) 2005 Elsevier Inc. All rights reserved.

%B Solid State Nuclear Magnetic Resonance %V 29 %P 183-190 %8 Feb %@ 0926-2040 %G English %U ://WOS:000234417500020 %N 1-3 %M WOS:000234417500020 %! Solid-state NMR structural studies of the fibril form of a mutant mouse prion peptide PrP89-143(P101L) %R Doi 10.1016/J.Ssnmr.2005.09.017