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Updated: Aug 6, 2026
12:57
Investigating the Spreading and Toxicity of Prion-like Proteins Using the Metazoan Model Organism C. elegans
Published on: January 8, 2015
Structural insights into the interaction between prion protein and nucleic acid
Luis Maurício T R Lima1, Yraima Cordeiro, Luzineide W Tinoco
1Faculdade de Farmacia, Universidade Federal do Rio de Janeiro, 21941-590 Rio de Janeiro, RJ Brazil.
Biochemistry
|July 27, 2006
Summary
Researchers visualized the prion protein (PrP) complexed with DNA, revealing how these molecules interact. This finding advances understanding of prion diseases and potential therapeutic strategies.
Area of Science:
- Biochemistry
- Structural Biology
- Neuroscience
Background:
- Transmissible spongiform encephalopathies (TSEs) are linked to the prion protein (PrP).
- Factors modulating normal PrP (PrP(C)) to pathological PrP (PrP(Sc)) conversion are not fully understood.
- PrP exhibits high-affinity binding to nucleic acids.
Purpose of the Study:
- To elucidate the structural basis of the interaction between the prion protein and DNA.
- To characterize the binding affinity and identify key interacting regions within PrP.
Main Methods:
- Small-angle X-ray scattering (SAXS) to determine overall complex structure.
- Nuclear magnetic resonance (NMR) spectroscopy to map interaction sites.
Main Results:
- A tight, nanomolar-affinity complex formed between full-length recombinant mouse PrP and an 18 bp double-stranded DNA (E2DBS).
- SAXS revealed increased dimensions of the PrP-DNA complex, with the globular domain playing a significant role.
- NMR identified interaction sites in both the disordered and globular domains of PrP.
Conclusions:
- The prion protein interacts with DNA primarily through its globular domain, but also involves the unstructured region.
- Structural insights into PrP-oligonucleotide binding offer new strategies for developing therapeutics against prion diseases.
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