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Updated: May 24, 2026

Protein Misfolding Cyclic Amplification of Prions
Published on: November 7, 2012
Insights into structural properties of denatured human prion 121-230 at melting temperature studied by replica
Jaw-Luen Tang1, Po-Jen Wu, Shing-Chuen Wang
1Department of Physics, National Chung Cheng University, Ming-Hsiung Chia-Yi, Taiwan 62102, ROC.
Abstract:
Misfolding and aggregation of the prion protein (PrP) is responsible for the development of fatal transmissible neurodegenerative diseases. PrP undergoes structural conversion from a natively folded state into a misfolded state, resulting in aggregated amyloid fibrils. Partial unfolding has been recognized as an essential step in fibrillation, especially at the middle point of unfolding. To study the possible aggregation-prone states, we characterized the structure of the C-terminal globular domain of human prion (huPrP) 121-230 near extended conformation at melting temperature by replica exchange molecular dynamics (REMD) simulation, as the REMD method is the most suited generalized-ensemble algorithm that performs random walk in energy space and promotes a system to escape from local energy traps. Our results revealed that denatured huPrP is partially folded with α-helical structure at melting temperature. The simulation results provide further insight into the unfolding of prion, which is essential in pathogenesis of prion diseases.
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