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Title: Differential effects of divalent cations on elk prion protein fibril formation and stability

Journal Article · · Prion
 [1];  [2]
  1. Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States); United States Department of Agriculture, Agricultural Research Service, National Animal Disease Center, Ames, IA (United States)
  2. United States Department of Agriculture, Agricultural Research Service, National Animal Disease Center, Ames, IA (United States)

Misfolding of the normally folded prion protein of mammals (PrPC) into infectious fibrils causes a variety of diseases, from scrapie in sheep to chronic wasting disease (CWD) in cervids. The misfolded form of PrPC, termed PrPSc, or in this case PrPCWD, interacts with PrPC to create more PrPCWD. This process is not clearly defined but is affected by the presence and interactions of biotic and abiotic cofactors. These include nucleic acids, lipids, glycosylation, pH, and ionic character. PrPC has been shown to act as a copper-binding protein in vivo, though it also binds to other divalents as well. The significance of this action has not been conclusively elucidated. Previous reports have shown that metal binding sites occur throughout the N-terminal region of PrPC. Other cations like manganese have also been shown to affect PrPC abundance in a transcript-independent fashion. Here, we examined the ability of different divalent cations to influence the stability and in vitro conversion of two variants of PrP from elk (L/M132, 26–234). We find that copper and zinc destabilize PrP. We also find that PrP M132 exhibits a greater degree of divalent cation induced destabilization than L132. This supports findings that leucine at position 132 confers resistance to CWD, while M132 is susceptible. However, in vitro conversion of PrP is equally suppressed by either copper or zinc, in both L132 and M132 backgrounds. This report demonstrates the complex importance of ionic character on the PrPC folding pathway selection on the route to PrPSc formation.

Research Organization:
Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-06OR23100
OSTI ID:
1494691
Journal Information:
Prion, Vol. 12, Issue 1; ISSN 1933-6896
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

References (46)

Prion protein NMR structures of elk and of mouse/elk hybrids journal January 2005
Dietary magnesium and copper affect survival time and neuroinflammation in chronic wasting disease journal May 2016
Cross-species transmission of CWD prions journal January 2016
Experimental Oral Transmission of Chronic Wasting Disease to Reindeer (Rangifer tarandus tarandus) journal June 2012
First case of chronic wasting disease in Europe in a Norwegian free-ranging reindeer journal September 2016
Methods to Estimate the Conformation of Proteins and Polypeptides from Circular Dichroism Data journal March 1996
Zinc Drives a Tertiary Fold in the Prion Protein with Familial Disease Mutation Sites at the Interface journal February 2013
The Priori Diseases journal July 1998
Spongiform Encephalopathy of Rocky Mountain elk journal October 1982
Thermodynamics of unfolding for turkey ovomucoid third domain: Thermal and chemical denaturation journal December 1993
The Prion Protein is a Combined Zinc and Copper Binding Protein:  Zn 2+ Alters the Distribution of Cu 2+ Coordination Modes journal December 2007
Evidence of a molecular barrier limiting susceptibility of humans, cattle and sheep to chronic wasting disease journal September 2000
Chronic Wasting Disease of Captive mule Deer: a Spongiform Encephalopathy journal January 1980
Copper Binding Extrinsic to the Octarepeat Region in the Prion Protein journal October 2009
Prion Seeding Activities of Mouse Scrapie Strains with Divergent PrPSc Protease Sensitivities and Amyloid Plaque Content Using RT-QuIC and eQuIC journal November 2012
Comparison of Two US Sheep Scrapie Isolates Supports Identification as Separate Strains journal July 2016
Dissociation of pathological and molecular phenotype of variant Creutzfeldt-Jakob disease in transgenic human prion protein 129 heterozygous mice journal June 2006
Novel proteinaceous infectious particles cause scrapie journal April 1982
Copper(II) Inhibits in Vitro Conversion of Prion Protein into Amyloid Fibrils journal May 2005
Spongiform Encephalopathy in Free-Ranging mule deer (Odocoileus Hemionus), White-Tailed deer (Odocoileus Virginianus) and Rocky Mountain elk (Cervus Elaphus Nelsoni) in Northcentral Colorado journal January 1997
Interaction between Prion Protein's Copper-Bound Octarepeat Domain and a Charged C-Terminal Pocket Suggests a Mechanism for N-Terminal Regulation journal July 2016
Resistance to Chronic Wasting Disease in Transgenic Mice Expressing a Naturally Occurring Allelic Variant of Deer Prion Protein journal February 2007
Molecular mechanism of Thioflavin-T binding to amyloid fibrils journal July 2010
Contributions of the Prion Protein Sequence, Strain, and Environment to the Species Barrier journal November 2015
Raman Optical Activity and Circular Dichroism Reveal Dramatic Differences in the Influence of Divalent Copper and Manganese Ions on Prion Protein Folding journal February 2008
Metal binding sites in amyloid oligomers: Complexes and mechanisms journal October 2012
Consequences of manganese replacement of copper for prion protein function and proteinase resistance journal March 2000
Rapid End-Point Quantitation of Prion Seeding Activity with Sensitivity Comparable to Bioassays journal December 2010
Strain Characterization of the Korean CWD Cases in 2001 and 2004 journal January 2013
Prion Protein Selectively Binds Copper(II) Ions journal May 1998
In vitro Conversion of Full-length Mammalian Prion Protein Produces Amyloid Form with Physical Properties of PrPSc journal February 2005
A Comparison of Classical and H-Type Bovine Spongiform Encephalopathy Associated with E211K Prion Protein Polymorphism in Wild-Type and EK211 Cattle Following Intracranial Inoculation journal September 2016
A comparative analysis of rapid methods for purification and refolding of recombinant bovine prion protein journal April 2012
Human Prion Protein with Valine 129 Prevents Expression of Variant CJD Phenotype journal November 2004
Preliminary Observations of Genetic Susceptibility of elk ( Cervus Elaphus Nelsoni ) to Chronic Wasting Disease by Experimental Oral Inoculation journal January 2006
Molecular-Level Examination of Cu 2+ Binding Structure for Amyloid Fibrils of 40-Residue Alzheimer’s β by Solid-State NMR Spectroscopy journal March 2011
Use of bovine recombinant prion protein and real-time quaking-induced conversion to detect cattle transmissible mink encephalopathy prions and discriminate classical and atypical L- and H-Type bovine spongiform encephalopathy journal February 2017
Trans-species amplification of PrPCWD and correlation with rigid loop 170N journal April 2009
Using circular dichroism collected as a function of temperature to determine the thermodynamics of protein unfolding and binding interactions journal December 2006
Determination of the folding of proteins as a function of denaturants, osmolytes or ligands using circular dichroism journal December 2006
Protein secondary structure and circular dichroism: A practical guide journal January 1990
Zinc ions promote Alzheimer A  aggregation via population shift of polymorphic states journal May 2010
Using circular dichroism spectra to estimate protein secondary structure journal January 2007
Prion Protein Interaction with Glycosaminoglycan Occurs with the Formation of Oligomeric Complexes Stabilized by Cu(II) Bridges journal May 2002
Unfolding free energy changes determined by the linear extrapolation method. 1. Unfolding of phenylmethanesulfonyl .alpha.-chymotrypsin using different denaturants journal October 1988
Elk with a long incubation prion disease phenotype have a unique PrPd profile journal January 2007

Cited By (3)

The first report of genetic variations in the chicken prion protein gene journal July 2018
Preparation of lyophilized recombinant prion protein for TSE diagnosis by RT-QuIC journal December 2018
Structural Consequences of Copper Binding to the Prion Protein journal July 2019

Figures / Tables (4)