1AV1

CRYSTAL STRUCTURE OF HUMAN APOLIPOPROTEIN A-I


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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 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 s ...

    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.


    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


    Organizational Affiliation

    Department of Organic Chemistry, Southern Research Institute, Birmingham, AL 35205, USA. borhani@sri.org




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
APOLIPOPROTEIN A-I
A, B, C, D
201Homo sapiensGene 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 = 97.470α = 90.00
b = 113.870β = 90.00
c = 196.190γ = 90.00
Software Package:
Software NamePurpose
ROTAVATAdata scaling
X-PLORmodel building
HASSPphasing
CCP4data scaling
X-PLORphasing
MOSFLMdata reduction
X-PLORrefinement
HASSPmodel building
TRUNCATE)data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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