3R2P

2.2 Angstrom Crystal Structure of C Terminal Truncated Human Apolipoprotein A-I Reveals the Assembly of HDL by Dimerization.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.236 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of C-terminal Truncated Apolipoprotein A-I Reveals the Assembly of High Density Lipoprotein (HDL) by Dimerization.

Mei, X.Atkinson, D.

(2011) J Biol Chem 286: 38570-38582

  • DOI: 10.1074/jbc.M111.260422
  • Primary Citation of Related Structures:  
    3R2P

  • PubMed Abstract: 
  • Apolipoprotein A-I (apoA-I) plays important structural and functional roles in plasma high density lipoprotein (HDL) that is responsible for reverse cholesterol transport. However, a molecular understanding of HDL assembly and function remains enigmatic. ...

    Apolipoprotein A-I (apoA-I) plays important structural and functional roles in plasma high density lipoprotein (HDL) that is responsible for reverse cholesterol transport. However, a molecular understanding of HDL assembly and function remains enigmatic. The 2.2-Å crystal structure of Δ(185-243)apoA-I reported here shows that it forms a half-circle dimer. The backbone of the dimer consists of two elongated antiparallel proline-kinked helices (five AB tandem repeats). The N-terminal domain of each molecule forms a four-helix bundle with the helical C-terminal region of the symmetry-related partner. The central region forms a flexible domain with two antiparallel helices connecting the bundles at each end. The two-domain dimer structure based on helical repeats suggests the role of apoA-I in the formation of discoidal HDL particles. Furthermore, the structure suggests the possible interaction with lecithin-cholesterol acyltransferase and may shed light on the molecular details of the effect of the Milano, Paris, and Fin mutations.


    Organizational Affiliation

    Department of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Apolipoprotein A-I A185Homo sapiensMutation(s): 0 
Gene Names: APOA1
Find proteins for P02647 (Homo sapiens)
Explore P02647 
Go to UniProtKB:  P02647
NIH Common Fund Data Resources
PHAROS:  P02647
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.236 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.333α = 90
b = 30.178β = 90
c = 69.576γ = 90
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2011-03-14 
  • Released Date: 2011-09-21 
  • Deposition Author(s): Mei, X., Atkinson, D.

Revision History 

  • Version 1.0: 2011-09-21
    Type: Initial release
  • Version 1.1: 2011-09-28
    Changes: Database references, Structure summary
  • Version 1.2: 2011-11-16
    Changes: Database references