1HJM

HUMAN PRION PROTEIN AT PH 7.0


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: LOWER TARGET FUNCTION 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Influence of Ph on NMR Structure and Stability of the Human Prion Protein Globular Domain

Calzolai, L.Zahn, R.

(2003) J.Biol.Chem. 278: 35592

  • DOI: 10.1074/jbc.M303005200
  • Primary Citation of Related Structures:  1HJN

  • PubMed Abstract: 
  • The NMR structure of the globular domain of the human prion protein (hPrP) with residues 121-230 at pH 7.0 shows the same global fold as the previously published structure determined at pH 4.5. It contains three alpha-helices, comprising residues 144 ...

    The NMR structure of the globular domain of the human prion protein (hPrP) with residues 121-230 at pH 7.0 shows the same global fold as the previously published structure determined at pH 4.5. It contains three alpha-helices, comprising residues 144-156, 174-194, and 200-228, and a short anti-parallel beta-sheet, comprising residues 128-131 and 161-164. There are slight, strictly localized, conformational changes at neutral pH when compared with acidic solution conditions: helix alpha1 is elongated at the C-terminal end with residues 153-156 forming a 310-helix, and the population of helical structure in the C-terminal two turns of helix alpha 2 is increased. The protonation of His155 and His187 presumably contributes to these structural changes. Thermal unfolding monitored by far UV CD indicates that hPrP-(121-230) is significantly more stable at neutral pH. Measurements of amide proton protection factors map local differences in protein stability within residues 154-157 at the C-terminal end of helix alpha 1 and residues 161-164 of beta-strand 2. These two segments appear to form a separate domain that at acidic pH has a larger tendency to unfold than the overall protein structure. This domain could provide a "starting point" for pH-induced unfolding and thus may be implicated in endosomic PrPC to PrPSc conformational transition resulting in transmissible spongiform encephalopathies.


    Organizational Affiliation

    Institut für Molekularbiologie und Biophysik, Eidgenössische Technische Hochschule Hönggerberg, CH-8093 Zürich, Switzerland. luigi@mol.biol.ethz.ch




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MAJOR PRION PROTEIN PRECURSOR
A
104Homo sapiensGene Names: PRNP (ALTPRP, PRIP, PRP)
Find proteins for P04156 (Homo sapiens)
Go to Gene View: PRNP
Go to UniProtKB:  P04156
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: LOWER TARGET FUNCTION 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2003-02-27 
  • Released Date: 2003-07-03 
  • Deposition Author(s): Calzolai, L., Zahn, R.

Revision History 

  • Version 1.0: 2003-07-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance