1YA9

Crystal Structure of the 22kDa N-Terminal Fragment of Mouse Apolipoprotein E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Engineering conformational destabilization into mouse apolipoprotein E. A model for a unique property of human apolipoprotein E4

Hatters, D.M.Peters-Libeu, C.A.Weisgraber, K.H.

(2005) J.Biol.Chem. 280: 26477-26482

  • DOI: 10.1074/jbc.M503910200

  • PubMed Abstract: 
  • Apolipoprotein (apo) E4 is a major risk factor for Alzheimer and cardiovascular diseases. ApoE4 differs from the two other common isoforms (apoE2 and apoE3) by its lower resistance to denaturation and greater propensity to form partially folded inter ...

    Apolipoprotein (apo) E4 is a major risk factor for Alzheimer and cardiovascular diseases. ApoE4 differs from the two other common isoforms (apoE2 and apoE3) by its lower resistance to denaturation and greater propensity to form partially folded intermediates. As a first step to determine the importance of stability differences in vivo, we reengineered a partially humanized variant of the amino-terminal domain of mouse apoE (T61R mouse apoE) to acquire a destabilized conformation like that of apoE4. For this process, we determined the crystal structure of wild-type mouse apoE, which, like apoE4, forms a four-helix bundle, and identified two structural differences in the turn between helices 2 and 3 and in the middle of helix 3 as potentially destabilizing sites. Introducing mutations G83T and N113G at these sites destabilized the mouse apoE conformation. The mutant mouse apoE more rapidly remodeled phospholipid than T61R mouse apoE, which supports the hypothesis that a destabilized conformation promotes apoE4 lipid binding.


    Organizational Affiliation

    Gladstone Institute of Neurological Disease, San Francisco, California 94158, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Apolipoprotein E
A
181Mus musculusMutation(s): 0 
Gene Names: Apoe
Find proteins for P08226 (Mus musculus)
Go to UniProtKB:  P08226
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 29.034α = 90.00
b = 49.233β = 90.00
c = 112.177γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
CCP4data scaling
EPMRphasing
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance