Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.259 
  • R-Value Observed: 0.209 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


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 Biol 3: 718-722

  • DOI: https://doi.org/10.1038/nsb0896-718
  • Primary Citation of Related Structures:  
    1NFN, 1NFO

  • 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. 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
APOLIPOPROTEIN E3191Homo sapiensMutation(s): 0 
Gene Names: E2
UniProt & NIH Common Fund Data Resources
Find proteins for P02649 (Homo sapiens)
Explore P02649 
Go to UniProtKB:  P02649
GTEx:  ENSG00000130203 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02649
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.259 
  • R-Value Observed: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.701α = 90
b = 53.355β = 90
c = 84.509γ = 90
Software Package:
Software NamePurpose
SHELXL-93model building
X-PLORmodel building
ADSCdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-01-27
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-09
    Changes: Database references, Refinement description
  • Version 1.4: 2024-05-22
    Changes: Data collection