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Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein
BACKGROUND: The conformational conversion of the host-derived cellular prion protein (PrP(C)) into the disease-associated scrapie isoform (PrP(Sc)) is responsible for the pathogenesis of transmissible spongiform encephalopathies (TSEs). Various single-point mutations in PrP(C)s could cause structura...
Autores principales: | , , , , , , |
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Formato: | Texto |
Lenguaje: | English |
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Public Library of Science
2010
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2951349/ https://www.ncbi.nlm.nih.gov/pubmed/20949107 http://dx.doi.org/10.1371/journal.pone.0013273 |
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author | Wen, Yi Li, Jun Xiong, Minqian Peng, Yu Yao, Wenming Hong, Jing Lin, Donghai |
author_facet | Wen, Yi Li, Jun Xiong, Minqian Peng, Yu Yao, Wenming Hong, Jing Lin, Donghai |
author_sort | Wen, Yi |
collection | PubMed |
description | BACKGROUND: The conformational conversion of the host-derived cellular prion protein (PrP(C)) into the disease-associated scrapie isoform (PrP(Sc)) is responsible for the pathogenesis of transmissible spongiform encephalopathies (TSEs). Various single-point mutations in PrP(C)s could cause structural changes and thereby distinctly influence the conformational conversion. Elucidation of the differences between the wild-type rabbit PrP(C) (RaPrP(C)) and various mutants would be of great help to understand the ability of RaPrP(C) to be resistant to TSE agents. METHODOLOGY/PRINCIPAL FINDINGS: We determined the solution structure of the I214V mutant of RaPrP(C)(91–228) and detected the backbone dynamics of its structured C-terminal domain (121–228). The I214V mutant displays a visible shift of surface charge distribution that may have a potential effect on the binding specificity and affinity with other chaperones. The number of hydrogen bonds declines dramatically. Urea-induced transition experiments reveal an obvious decrease in the conformational stability. Furthermore, the NMR dynamics analysis discloses a significant increase in the backbone flexibility on the pico- to nanosecond time scale, indicative of lower energy barrier for structural rearrangement. CONCLUSIONS/SIGNIFICANCE: Our results suggest that both the surface charge distribution and the intrinsic backbone flexibility greatly contribute to species barriers for the transmission of TSEs, and thereby provide valuable hints for understanding the inability of the conformational conversion for RaPrP(C). |
format | Text |
id | pubmed-2951349 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-29513492010-10-14 Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein Wen, Yi Li, Jun Xiong, Minqian Peng, Yu Yao, Wenming Hong, Jing Lin, Donghai PLoS One Research Article BACKGROUND: The conformational conversion of the host-derived cellular prion protein (PrP(C)) into the disease-associated scrapie isoform (PrP(Sc)) is responsible for the pathogenesis of transmissible spongiform encephalopathies (TSEs). Various single-point mutations in PrP(C)s could cause structural changes and thereby distinctly influence the conformational conversion. Elucidation of the differences between the wild-type rabbit PrP(C) (RaPrP(C)) and various mutants would be of great help to understand the ability of RaPrP(C) to be resistant to TSE agents. METHODOLOGY/PRINCIPAL FINDINGS: We determined the solution structure of the I214V mutant of RaPrP(C)(91–228) and detected the backbone dynamics of its structured C-terminal domain (121–228). The I214V mutant displays a visible shift of surface charge distribution that may have a potential effect on the binding specificity and affinity with other chaperones. The number of hydrogen bonds declines dramatically. Urea-induced transition experiments reveal an obvious decrease in the conformational stability. Furthermore, the NMR dynamics analysis discloses a significant increase in the backbone flexibility on the pico- to nanosecond time scale, indicative of lower energy barrier for structural rearrangement. CONCLUSIONS/SIGNIFICANCE: Our results suggest that both the surface charge distribution and the intrinsic backbone flexibility greatly contribute to species barriers for the transmission of TSEs, and thereby provide valuable hints for understanding the inability of the conformational conversion for RaPrP(C). Public Library of Science 2010-10-07 /pmc/articles/PMC2951349/ /pubmed/20949107 http://dx.doi.org/10.1371/journal.pone.0013273 Text en Wen et al. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Wen, Yi Li, Jun Xiong, Minqian Peng, Yu Yao, Wenming Hong, Jing Lin, Donghai Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein |
title | Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein |
title_full | Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein |
title_fullStr | Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein |
title_full_unstemmed | Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein |
title_short | Solution Structure and Dynamics of the I214V Mutant of the Rabbit Prion Protein |
title_sort | solution structure and dynamics of the i214v mutant of the rabbit prion protein |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2951349/ https://www.ncbi.nlm.nih.gov/pubmed/20949107 http://dx.doi.org/10.1371/journal.pone.0013273 |
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