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TitleStructural and Computational Study of the GroEL-Prion Protein Complex.
Journal, issue, pagesBiomedicines, Vol. 9, Issue 11, Year 2021
Publish dateNov 9, 2021
AuthorsAleksandra A Mamchur / Andrei V Moiseenko / Irina S Panina / Igor A Yaroshevich / Sofia S Kudryavtseva / Evgeny B Pichkur / Olga S Sokolova / Vladimir I Muronetz / Tatiana B Stanishneva-Konovalova /
PubMed AbstractThe molecular chaperone GroEL is designed to promote protein folding and prevent aggregation. However, the interaction between GroEL and the prion protein, PrP, could lead to pathogenic ...The molecular chaperone GroEL is designed to promote protein folding and prevent aggregation. However, the interaction between GroEL and the prion protein, PrP, could lead to pathogenic transformation of the latter to the aggregation-prone PrP form. Here, the molecular basis of the interactions in the GroEL-PrP complex is studied with cryo-EM and molecular dynamics approaches. The obtained cryo-EM structure shows PrP to be bound to several subunits of GroEL at the level of their apical domains. According to MD simulations, the disordered N-domain of PrP forms much more intermolecular contacts with GroEL. Upon binding to the GroEL, the N-domain of PrP begins to form short helices, while the C-domain of PrP exhibits a tendency to unfold its α2-helix. In the absence of the nucleotides in the system, these processes are manifested at the hundred nanoseconds to microsecond timescale.
External linksBiomedicines / PubMed:34829878 / PubMed Central
MethodsEM (single particle)
Resolution4.0 Å
Structure data

EMDB-13762:
GroEL - PrP complex
Method: EM (single particle) / Resolution: 4.0 Å

Source
  • Escherichia coli K-12 (bacteria)
  • Ovis aries (sheep)

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