2RSK: RNA aptamer against prion protein in complex with the partial binding peptide

Prion proteins (PrPs) cause prion diseases, such as bovine spongiform encephalopathy. The conversion of a normal cellular form (PrP(C)) of PrP into an abnormal form (PrP(Sc)) is thought to be associated with the pathogenesis. An RNA aptamer that tightly binds to and stabilizes PrP(C) is expected to block this conversion and to thereby prevent prion diseases. Here, we show that an RNA aptamer comprising only 12 residues, r(GGAGGAGGAGGA) (R12), reduces the PrP(Sc) level in mouse neuronal cells persistently infected with the transmissible spongiform encephalopathy agent. Nuclear magnetic resonance analysis revealed that R12, folded into a unique quadruplex structure, forms a dimer and that each monomer simultaneously binds to two portions of the N-terminal half of PrP(C), resulting in tight binding. Electrostatic and stacking interactions contribute to the affinity of each portion. Our results demonstrate the therapeutic potential of an RNA aptamer as to prion diseases.
PDB ID: 2RSKDownload
MMDB ID: 107484
PDB Deposition Date: 2012/3/8
Updated in MMDB: 2018/05
Experimental Method:
solution nmr
Similar Structures:
Biological Unit for 2RSK: tetrameric; determined by author
Molecular Components in 2RSK
Label Count Molecule
Proteins (2 molecules)
Partial Binding Peptide of Major Prion Protein(Gene symbol: PRNP)
Molecule annotation
Nucleotide(1 molecule)
RNA (5'-r(*gp*gp*ap*gp*gp*ap*gp*gp*ap*gp*gp*a)-3')
Molecule annotation
* Click molecule labels to explore molecular sequence information.

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