Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 93762.23 
• Atom Count: 6588 
• Residue Count: 804 
• Unique protein chains: 1

1AV1

CRYSTAL STRUCTURE OF HUMAN APOLIPOPROTEIN A-I

• DOI: 10.2210/pdb1AV1/pdb

• Classification: LIPID TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 1997-09-23 Released: 1998-02-04 
• Deposition Author(s): Borhani, D.W., Rogers, D.P., Engler, J.A., Brouillette, C.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 4 Å
• R-Value Free: 0.428 
• R-Value Work: 0.382 

Literature

Crystal structure of truncated human apolipoprotein A-I suggests a lipid-bound conformation.

Borhani, D.W., Rogers, D.P., Engler, J.A., Brouillette, C.G.

(1997) Proc.Natl.Acad.Sci.USA 94: 12291-12296

• PubMed: 9356442 


• PubMed Abstract: 
  

The structure of truncated human apolipoprotein A-I (apo A-I), the major protein component of high density lipoprotein, has been determined at 4-A resolution. The crystals comprise residues 44-243 (exon 4) of apo A-I, a fragment that binds to lipid similarly to intact apo A-I and that retains the lipid-bound conformation even in the absence of lipid. The molecule consists almost entirely of a pseudo-continuous, amphipathic alpha-helix that is punctuated by kinks at regularly spaced proline residues; it adopts a shape similar to a horseshoe of dimensions 125 x 80 x 40 A. Four molecules in the asymmetric unit associate via their hydrophobic faces to form an antiparallel four-helix bundle with an elliptical ring shape. Based on this structure, we propose a model for the structure of apo A-I bound to high density lipoprotein.

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Related Citations: 

• Truncation of the Amino Terminus of Human Apolipoprotein A-I Substantially Alters Only the Lipid-Free Conformation
  Rogers, D.P.,Brouillette, C.G.,Engler, J.A.,Tendian, S.W.,Roberts, L.,Mishra, V.K.,Anantharamaiah, G.M.,Lund-Katz, S.,Phillips, M.C.,Ray, M.J.
  (1997) Biochemistry 36: 288
• Structural Models of Human Apolipoprotein A-I
  Brouillette, C.G.,Anantharamaiah, G.M.
  (1995) Biochim.Biophys.Acta 1256: 103
• Structural Analysis of Apolipoprotein A-I: Limited Proteolysis of Methionine-Reduced and-Oxidized Lipid-Free and Lipid-Bound Human Apo A-I
  Roberts, L.M.,Ray, M.J.,Shih, T.W.,Hayden, E.,Reader, M.M.,Brouillette, C.G.
  (1997) Biochemistry 36: 7615




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Organizational Affiliation: 

Department of Organic Chemistry, Southern Research Institute, Birmingham, AL 35205, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
APOLIPOPROTEIN A-I	A, B, C, D	201	Homo sapiens	Mutation(s): 0  Gene Names: APOA1
Find proteins for P02647 (Homo sapiens) Go to Gene View: APOA1 Go to UniProtKB:  P02647

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 4 Å
• R-Value Free: 0.428 
• R-Value Work: 0.382 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 97.470	α = 90.00
b = 113.870	β = 90.00
c = 196.190	γ = 90.00

Software Package:

Software Name	Purpose
HASSP	model building
MOSFLM	data reduction
X-PLOR	model building
CCP4	data scaling
X-PLOR	phasing
HASSP	phasing
ROTAVATA	data scaling
TRUNCATE	data scaling
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-09-23 
• Released Date: 1998-02-04 
• Deposition Author(s): Borhani, D.W., Rogers, D.P., Engler, J.A., Brouillette, C.G.

Revision History 

• Version 1.0: 1998-02-04
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-04-04
  Type: Data collection, Other, Refinement description