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Updated: Jul 1, 2026
10:26
Monitoring Cell-to-cell Transmission of Prion-like Protein Aggregates in Drosophila Melanogaster
Published on: March 12, 2018
Human cellular prion protein interacts directly with clusterin protein
Fei Xu1, Elena Karnaukhova, Jaroslav G Vostal
1Division of Hematology, Office of Blood Research and Review, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Bethesda, MD, USA.
Biochimica Et Biophysica Acta
|September 13, 2008
Summary
Researchers discovered that clusterin, a chaperone protein, interacts with prion protein, a key factor in neurodegenerative diseases. This interaction involves clusterin's alpha subunit and sheds light on prion protein's function.
Area of Science:
- Neurobiology
- Molecular Biology
- Protein Interactions
Background:
- Prion protein (PrP) is a cell surface glycoprotein implicated in neurodegenerative diseases.
- PrP conformational changes are critical for prion disease propagation.
- Clusterin is a known chaperone glycoprotein with diverse cellular roles.
Purpose of the Study:
- To investigate potential interactions between prion protein and clusterin.
- To elucidate the molecular basis of the PrP-clusterin interaction.
- To understand the physiological relevance of this interaction for PrP function.
Main Methods:
- Yeast two-hybrid assay for initial interaction screening.
- In vivo co-immunoprecipitation in mammalian cells to confirm interaction.
- In vitro circular dichroism analysis.
- Deletion mapping to identify binding domains within clusterin and PrP.
Main Results:
- Identified a direct interaction between prion protein and clusterin.
- Confirmed the interaction in both yeast and mammalian systems.
- Determined that clusterin's alpha subunit, specifically a 62-amino acid segment in the alpha helix region, mediates binding to PrP.
- Showed that both full-length PrP and its N-terminal (aa 23-95) and C-terminal (aa 96-231) regions interact with clusterin.
Conclusions:
- Prion protein and clusterin physically interact.
- The alpha subunit of clusterin is responsible for binding to prion protein.
- This interaction provides novel insights into the molecular mechanisms governing prion protein's physiological roles and potential involvement in disease pathways.
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