1NFO

APOLIPOPROTEIN E2 (APOE2, D154A MUTATION)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.270 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Novel mechanism for defective receptor binding of apolipoprotein E2 in type III hyperlipoproteinemia.

Dong, L.M.Parkin, S.Trakhanov, S.D.Rupp, B.Simmons, T.Arnold, K.S.Newhouse, Y.M.Innerarity, T.L.Weisgraber, K.H.

(1996) Nat.Struct.Mol.Biol. 3: 718-722

  • Primary Citation of Related Structures:  1NFN

  • PubMed Abstract: 
  • The defective binding of apolipoprotein (apo) E2 to lipoprotein receptors, an underlying cause of type III hyperlipoproteinemia, results from replacement of Arg 158 with Cys, disrupting the naturally occurring salt bridge between Asp 154 and Arg 158. ...

    The defective binding of apolipoprotein (apo) E2 to lipoprotein receptors, an underlying cause of type III hyperlipoproteinemia, results from replacement of Arg 158 with Cys, disrupting the naturally occurring salt bridge between Asp 154 and Arg 158. A new bond between Asp 154 and Arg 150 is formed, shifting Arg 150 out of the receptor binding region. Elimination of the 154-150 salt bridge by site-directed mutagenesis of Asp 154 to Ala restored the receptor binding activity to near normal levels. The X-ray crystal structure of apoE2 Ala 154 demonstrated that Arg 150 was relocated within the receptor binding region. Our results demonstrate that defective binding of apoE2 occurs by a novel mechanism of the replacement of one salt bridge with another.


    Organizational Affiliation

    Gladstone Institute of Cardiovascular Disease, University of California, San Francisco 94141-9100, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
APOLIPOPROTEIN E2
A
191Homo sapiensGene Names: APOE
Find proteins for P02649 (Homo sapiens)
Go to Gene View: APOE
Go to UniProtKB:  P02649
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.270 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 40.613α = 90.00
b = 53.671β = 90.00
c = 84.795γ = 90.00
Software Package:
Software NamePurpose
SHELXL-93model building
SHELXL-93phasing
X-PLORmodel building
X-PLORrefinement
X-PLORphasing
ADSCdata collection
SHELXL-93refinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1996-07-17 
  • Released Date: 1997-01-27 
  • Deposition Author(s): Rupp, B., Parkin, S.

Revision History 

  • Version 1.0: 1997-01-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance