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Early structural features in mammalian prion conformation conversion

Giuseppe Legname1

  • 1Laboratory of Prion Biology, Neurobiology Sector, Scuola Internazionale Superiore di Studi Avanzati-SISSA, Trieste, Italy. legname@sissa.it

Prion
|March 29, 2012
PubMed

Insights

Researchers investigated familial prion disease mutations using molecular dynamics. Simulations revealed common folding patterns in the prion protein

Area of Science:

  • Neuroscience
  • Biochemistry
  • Structural Biology

Background:

  • Prion diseases involve the conversion of cellular prion protein (PrP(C)) to a disease-associated form (PrP(Sc)).
  • Sporadic prion diseases, accounting for 85% of human cases, involve PrP(C) to PrP(Sc) conversion via an unknown mechanism.
  • Familial prion diseases, approximately 15% of cases, are linked to mutations in the PRNP gene.

Purpose of the Study:

  • To investigate the structural impact of PRNP gene mutations on the cellular prion protein (PrP(C)).
  • To understand early conformational changes in PrP(C) that may lead to the formation of the disease-associated PrP(Sc) conformer.

Main Methods:

  • Molecular dynamics simulations were performed on various PrP(C) mutants associated with familial prion diseases.
  • Structural analysis focused on mutations located within the globular domain of the prion protein.

Main Results:

  • Simulations revealed common folding traits among different point mutations in the globular domain of PrP(C).
  • These findings provide insights into the initial conformational alterations preceding PrP(Sc) formation.

Conclusions:

  • The identified common folding traits offer a potential understanding of early events in prion formation.
  • These results support recent experimental data and suggest novel approaches for identifying initial structural determinants of prion diseases.

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