Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 22064.02 
• Atom Count: 1075 
• Residue Count: 191 
• Unique protein chains: 1

1NFO

APOLIPOPROTEIN E2 (APOE2, D154A MUTATION)

• DOI: 10.2210/pdb1NFO/pdb

• Classification: LIPID TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 1 


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

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Experimental Data Snapshot

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

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

• PubMed: 8756331 
• 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. 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.

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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
Molecule	Chains	Sequence Length	Organism	Details
APOLIPOPROTEIN E2	A	191	Homo sapiens	Mutation(s): 1  Gene 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 = 40.613	α = 90.00
b = 53.671	β = 90.00
c = 84.795	γ = 90.00

Software Package:

Software Name	Purpose
SHELXL-93	model building
SHELXL-93	phasing
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing
ADSC	data collection
SHELXL-93	refinement

Structure Validation

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