1CQM

PROTEIN AGGREGATION AND ALZHEIMER'S DISEASE: CRYSTALLOGRAPHIC ANALYSIS OF THE PHENOMENON. ENGINEERED VERSION OF THE RIBOSOMAL PROTEIN S6 USED AS A STABLE SCAFFOLD TO STUDY OLIGOMERIZATION.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Designed protein tetramer zipped together with a hydrophobic Alzheimer homology: a structural clue to amyloid assembly.

Otzen, D.E.Kristensen, O.Oliveberg, M.

(2000) Proc.Natl.Acad.Sci.USA 97: 9907-9912

  • DOI: 10.1073/pnas.160086297
  • Primary Citation of Related Structures:  1CQN, 1QJH

  • PubMed Abstract: 
  • Limited solubility and precipitation of amyloidogenic sequences such as the Alzheimer peptide (beta-AP) are major obstacles to a molecular understanding of protein fibrillation and deposition processes. Here we have circumvented the solubility proble ...

    Limited solubility and precipitation of amyloidogenic sequences such as the Alzheimer peptide (beta-AP) are major obstacles to a molecular understanding of protein fibrillation and deposition processes. Here we have circumvented the solubility problem by stepwise engineering a beta-AP homology into a soluble scaffold, the monomeric protein S6. The S6 construct with the highest beta-AP homology crystallizes as a tetramer that is linked by the beta-AP residues forming intermolecular antiparallel beta-sheets. This construct also shows increased coil aggregation during refolding, and a 14-mer peptide encompassing the engineered sequence forms fibrils. Mutational analysis shows that intermolecular association is linked to the overall hydrophobicity of the sticky sequence and implies the existence of "structural gatekeepers" in the wild-type protein, that is, charged side chains that prevent aggregation by interrupting contiguous stretches of hydrophobic residues in the primary sequence.


    Related Citations: 
    • Crystal structure of the ribosomal protein S6 from Thermus thermophilus
      Lindahl, M.,Svensson, L.A.,Liljas, A.,Sedelnikova, S.E.,Eliseikina, I.A.,Fomenkova, N.P.,Nevskaya, N.,Nikonov, S.V.,Garber, M.B.,Muranova, T.A.,Rykonova, A.I.,Amons, R.
      (1994) Embo J. 13: 1249


    Organizational Affiliation

    Department of Biochemistry, Umeâ University, S-901 87 Umeâ, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RIBOSOMAL PROTEIN S6
A, B
101Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579)Gene Names: rpsF
Find proteins for Q5SLP8 (Thermus thermophilus (strain HB8 / ATCC 27634 / DSM 579))
Go to UniProtKB:  Q5SLP8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.247 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 51.081α = 90.00
b = 105.546β = 90.00
c = 80.838γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
CNSphasing
CCP4data scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-09-08
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-02-01
    Type: Structure summary