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Related Concept Videos

Amyloid Fibrils03:03

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
The...
Molecular Chaperones and Protein Folding03:00

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Channel Rhodopsins01:11

Channel Rhodopsins

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Updated: Jul 10, 2026

Purification and Refolding to Amyloid Fibrils of (His)6-tagged Recombinant Shadoo Protein Expressed as Inclusion Bodies in E. coli
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Purification and Refolding to Amyloid Fibrils of (His)6-tagged Recombinant Shadoo Protein Expressed as Inclusion Bodies in E. coli

Published on: December 19, 2015

Prion: the chameleon protein.

W Q Zou1, P Gambetti

  • 1Department of Pathology and National Prion Disease Pathology Surveillance Center, Case Western Reserve University, Cleveland, OH 44106, USA. wenquan.zou@case.edu

Cellular and Molecular Life Sciences : CMLS
|October 30, 2007
PubMed
Summary
This summary is machine-generated.

Human prion diseases, including Creutzfeldt-Jakob disease (CJD) and kuru, present a spectrum of illnesses. Their diverse manifestations stem from the prion protein's adaptable structure.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pathology

Background:

  • Human prion diseases encompass a range of fatal neurodegenerative disorders, including Creutzfeldt-Jakob disease (CJD), variant CJD, Gerstmann-Sträussler-Scheinker syndrome, kuru, and fatal familial insomnia.
  • The historical understanding of these diseases has evolved through significant discoveries and challenges.

Purpose of the Study:

  • To provide an overview of the spectrum of human prion diseases.
  • To highlight the role of prion protein conformational changes in disease diversity.
  • To discuss recent advancements in modeling and characterizing prion diseases.

Main Methods:

  • Review of historical data and scientific literature on human prion diseases.
  • Analysis of recent progress in prion disease modeling.
  • Characterization of diverse prion protein (PrP) conformers.

Main Results:

  • The spectrum of human prion diseases, from CJD to kuru, is characterized by distinct clinical and pathological features.
  • Prion protein (PrP) exhibits remarkable conformational plasticity, described as 'chameleon-like'.
  • This conformational variability is directly linked to the wide array of prion disease presentations.

Conclusions:

  • The diverse clinical presentations of human prion diseases are fundamentally linked to the conformational polymorphism of the infectious prion protein.
  • Ongoing research in prion disease modeling and PrP characterization continues to unravel the complexities of these disorders.