1NFO

APOLIPOPROTEIN E2 (APOE2, D154A MUTATION)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.270 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.3 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 Biol 3: 718-722

  • DOI: 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 ...

    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
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
APOLIPOPROTEIN E2A191Homo sapiensMutation(s): 1 
Gene Names: E2, APOE
UniProt & NIH Common Fund Data Resources
Find proteins for P02649 (Homo sapiens)
Explore P02649 
Go to UniProtKB:  P02649
PHAROS:  P02649
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02649
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.270 
  • R-Value Observed: 0.206 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.613α = 90
b = 53.671β = 90
c = 84.795γ = 90
Software Package:
Software NamePurpose
SHELXL-93model building
X-PLORmodel building
SHELXL-93refinement
X-PLORrefinement
ADSCdata collection
SHELXL-93phasing
X-PLORphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

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

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: 2021-11-03
    Changes: Database references