3S84

Dimeric apoA-IV


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of Dimeric Apolipoprotein A-IV and Its Mechanism of Self-Association.

Deng, X.Morris, J.Dressmen, J.Tubb, M.R.Tso, P.Jerome, W.G.Davidson, W.S.Thompson, T.B.

(2012) Structure 20: 767-779

  • DOI: 10.1016/j.str.2012.02.020

  • PubMed Abstract: 
  • Apolipoproteins are key structural elements of lipoproteins and critical mediators of lipid metabolism. Their detergent-like properties allow them to emulsify lipid or exist in a soluble lipid-free form in various states of self-association. Unfortun ...

    Apolipoproteins are key structural elements of lipoproteins and critical mediators of lipid metabolism. Their detergent-like properties allow them to emulsify lipid or exist in a soluble lipid-free form in various states of self-association. Unfortunately, these traits have hampered high-resolution structural studies needed to understand the biogenesis of cardioprotective high-density lipoproteins (HDLs). We derived a crystal structure of the core domain of human apolipoprotein (apo)A-IV, an HDL component and important mediator of lipid absorption. The structure at 2.4 Å depicts two linearly connected 4-helix bundles participating in a helix swapping arrangement that offers a clear explanation for how the protein self-associates as well as clues to the structure of its monomeric form. This also provides a logical basis for antiparallel arrangements recently described for lipid-containing particles. Furthermore, we propose a "swinging door" model for apoA-IV lipid association.


    Organizational Affiliation

    Department of Molecular Genetics, Biochemistry, and Microbiology, College of Medicine, University of Cincinnati, OH 45267, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Apolipoprotein A-IV
A, B
273Homo sapiensMutation(s): 0 
Gene Names: APOA4
Find proteins for P06727 (Homo sapiens)
Go to Gene View: APOA4
Go to UniProtKB:  P06727
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.200 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 70.825α = 90.00
b = 70.825β = 90.00
c = 512.383γ = 120.00
Software Package:
Software NamePurpose
CRANKphasing
Blu-Icedata collection
BUSTERrefinement
XDSdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-16
    Type: Initial release
  • Version 1.1: 2012-06-20
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Advisory, Refinement description