1QJH

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: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.4 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 U S A 97: 9907-9912

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

  • 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 13:6: 1249

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
30S ribosomal protein S6A101Thermus thermophilusMutation(s): 4 
Gene Names: rpsFrps6
Find proteins for P23370 (Thermus thermophilus)
Explore P23370 
Go to UniProtKB:  P23370
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.701α = 90
b = 49.701β = 90
c = 73.255γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-06-29
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-17
    Changes: Data collection
  • Version 1.4: 2018-12-12
    Changes: Data collection, Database references, Source and taxonomy, Structure summary