Conformational dynamics in the core of human Y145Stop prion protein amyloid probed by relaxation dispersion NMR

M.D. Shannon, T. Theint, D. Mukhopadhyay, K. Surewicz, W.K. Surewicz, D. Marion, P. Schanda, C.P. Jaroniec, ChemPhysChem 20 (2019) 311–317.

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Journal Article | Published | English
Author
Shannon, Matthew D.; Theint, Theint; Mukhopadhyay, Dwaipayan; Surewicz, Krystyna; Surewicz, Witold K.; Marion, Dominique; Schanda, PaulIST Austria ; Jaroniec, Christopher P.
Abstract
Microsecond to millisecond timescale backbone dynamics of the amyloid core residues in Y145Stop human prion protein (PrP) fibrils were investigated by using 15N rotating frame (R1ρ) relaxation dispersion solid‐state nuclear magnetic resonance spectroscopy over a wide range of spin‐lock fields. Numerical simulations enabled the experimental relaxation dispersion profiles for most of the fibril core residues to be modelled by using a two‐state exchange process with a common exchange rate of 1000 s−1, corresponding to protein backbone motion on the timescale of 1 ms, and an excited‐state population of 2 %. We also found that the relaxation dispersion profiles for several amino acids positioned near the edges of the most structured regions of the amyloid core were better modelled by assuming somewhat higher excited‐state populations (∼5–15 %) and faster exchange rate constants, corresponding to protein backbone motions on the timescale of ∼100–300 μs. The slow backbone dynamics of the core residues were evaluated in the context of the structural model of human Y145Stop PrP amyloid.
Publishing Year
Date Published
2019-01-21
Journal Title
ChemPhysChem
Volume
20
Issue
2
Page
311-317
ISSN
IST-REx-ID

Cite this

Shannon MD, Theint T, Mukhopadhyay D, et al. Conformational dynamics in the core of human Y145Stop prion protein amyloid probed by relaxation dispersion NMR. ChemPhysChem. 2019;20(2):311-317. doi:10.1002/cphc.201800779
Shannon, M. D., Theint, T., Mukhopadhyay, D., Surewicz, K., Surewicz, W. K., Marion, D., … Jaroniec, C. P. (2019). Conformational dynamics in the core of human Y145Stop prion protein amyloid probed by relaxation dispersion NMR. ChemPhysChem. Wiley. https://doi.org/10.1002/cphc.201800779
Shannon, Matthew D., Theint Theint, Dwaipayan Mukhopadhyay, Krystyna Surewicz, Witold K. Surewicz, Dominique Marion, Paul Schanda, and Christopher P. Jaroniec. “Conformational Dynamics in the Core of Human Y145Stop Prion Protein Amyloid Probed by Relaxation Dispersion NMR.” ChemPhysChem. Wiley, 2019. https://doi.org/10.1002/cphc.201800779.
M. D. Shannon et al., “Conformational dynamics in the core of human Y145Stop prion protein amyloid probed by relaxation dispersion NMR,” ChemPhysChem, vol. 20, no. 2. Wiley, pp. 311–317, 2019.
Shannon MD, Theint T, Mukhopadhyay D, Surewicz K, Surewicz WK, Marion D, Schanda P, Jaroniec CP. 2019. Conformational dynamics in the core of human Y145Stop prion protein amyloid probed by relaxation dispersion NMR. ChemPhysChem. 20(2), 311–317.
Shannon, Matthew D., et al. “Conformational Dynamics in the Core of Human Y145Stop Prion Protein Amyloid Probed by Relaxation Dispersion NMR.” ChemPhysChem, vol. 20, no. 2, Wiley, 2019, pp. 311–17, doi:10.1002/cphc.201800779.

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PMID: 30276945
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