Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 38.92 kDa 
• Atom Count: 2736 
• Residue Count: 334 
• Unique protein chains: 1

2N5E

The 3D solution structure of discoidal high-density lipoprotein particles

• DOI: 10.2210/pdb2N5E/pdb
• BMRB: 25710

• Classification: LIPID BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-07-15 Released: 2016-12-21 
• Deposition Author(s): Bibow, S., Polyhach, Y., Eichmann, C., Chi, C.N., Kowal, J., Stahlberg, H., Jeschke, G., Guentert, P., Riek, R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: target function 

Literature

Solution structure of discoidal high-density lipoprotein particles with a shortened apolipoprotein A-I.

Bibow, S., Polyhach, Y., Eichmann, C., Chi, C.N., Kowal, J., Albiez, S., McLeod, R.A., Stahlberg, H., Jeschke, G., Guntert, P., Riek, R.

(2017) Nat Struct Mol Biol 24: 187-193

• PubMed: 28024148 
• DOI: 10.1038/nsmb.3345
• Primary Citation of Related Structures:  
  2N5E


• PubMed Abstract: 
  

High-density lipoprotein (HDL) particles are cholesterol and lipid transport containers. Mature HDL particles destined for the liver develop through the formation of intermediate discoidal HDL particles, which are the primary acceptors for cholesterol. Here we present the three-dimensional structure of reconstituted discoidal HDL (rdHDL) particles, using a shortened construct of human apolipoprotein A-I, determined from a combination of nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR) and transmission electron microscopy (TEM) data. The rdHDL particles feature a protein double belt surrounding a lipid bilayer patch in an antiparallel fashion. The integrity of this structure is maintained by up to 28 salt bridges and a zipper-like pattern of cation-π interactions between helices 4 and 6. To accommodate a hydrophobic interior, a gross 'right-to-right' rotation of the helices after lipidation is necessary. The structure reflects the complexity required for a shuttling container to hold a fluid lipid or cholesterol interior at a protein:lipid ratio of 1:50.

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Organizational Affiliation: 

Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Apolipoprotein A-I	A, B	167	Homo sapiens	Mutation(s): 0  Gene Names: APOA1
Find proteins for P02647 (Homo sapiens) Explore P02647  Go to UniProtKB:  P02647
NIH Common Fund Data Resources
PHAROS:  P02647 GTEx:  ENSG00000118137

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: target function 
• OLDERADO: 2N5E Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-07-15 
• Released Date: 2016-12-21 
Deposition Author(s): Bibow, S., Polyhach, Y., Eichmann, C., Chi, C.N., Kowal, J., Stahlberg, H., Jeschke, G., Guentert, P., Riek, R.

Revision History 

• Version 1.0: 2016-12-21
  Type: Initial release
  
• Version 1.1: 2017-01-11
  Changes: Database references
• Version 1.2: 2017-02-22
  Changes: Database references