期刊
BIOMOLECULAR NMR ASSIGNMENTS
卷 15, 期 1, 页码 45-51出版社
SPRINGER
DOI: 10.1007/s12104-020-09981-4
关键词
Prion protein; Amyloid; Gerstmann– Straü ssler– Scheinker disease; Magic-angle spinning; Solid-state NMR
资金
- NIH [R01GM094357, S10OD012303, P01AI106705, R01NS083687, RF1AG061797]
- NSF [MCB-1715174]
Solid-state NMR was used to establish the chemical shift assignments for amyloid fibrils formed by the A117V and M129V mutants of human PrP23-144, providing insights into the amyloid core regions and secondary protein structures. These mutants are associated with the development of Gerstmann-Straussler-Scheinker disease in the context of full-length PrP in vivo.
The C-terminally truncated Y145Stop variant of prion protein (PrP23-144) has been linked to a heritable prionopathy in humans and is also capable of triggering a transmissible prion disease in mice. PrP23-144 can be converted from soluble monomeric form to amyloid under physiological conditions, providing an in vitro model for investigating the molecular basis of amyloid strains and cross-seeding barriers. Here, we use magic-angle spinning solid-state NMR to establish the sequential backbone and sidechain C-13 and N-15 chemical shift assignments for amyloid fibrils formed by the A117V and M129V mutants of human PrP23-144, which in the context of full length PrP in vivo are among the specific residues associated with development of Gerstmann-Straussler-Scheinker disease. The chemical shift data are utilized to identify amino acids comprising the rigid amyloid core regions and to predict the protein secondary structures for human PrP23-144 A117V and M129V fibrils.
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