1OEF

PEPTIDE OF HUMAN APOE RESIDUES 263-286, NMR, 5 STRUCTURES AT PH 4.8, 37 DEGREES CELSIUS AND PEPTIDE:SDS MOLE RATIO OF 1:90


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

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Literature

Conformations of human apolipoprotein E(263-286) and E(267-289) in aqueous solutions of sodium dodecyl sulfate by CD and 1H NMR.

Wang, G.Pierens, G.K.Treleaven, W.D.Sparrow, J.T.Cushley, R.J.

(1996) Biochemistry 35: 10358-10366

  • DOI: 10.1021/bi960934t
  • Primary Citation of Related Structures:  
    1OEF, 1OEG

  • PubMed Abstract: 
  • Structures of apoE(263-286) and apoE(267-289) have been determined in aqueous solution containing 90-fold molar excess of perdeuterated sodium dodecyl sulfate by CD and 1H NMR. Conformations were calculated by distance geometry based on 370 and 276 NOE distance restraints, respectively ...

    Structures of apoE(263-286) and apoE(267-289) have been determined in aqueous solution containing 90-fold molar excess of perdeuterated sodium dodecyl sulfate by CD and 1H NMR. Conformations were calculated by distance geometry based on 370 and 276 NOE distance restraints, respectively. RMSD for superimposing the region 265-284 from an ensemble of 41 structures for apoE(263-286) is 0.64 +/- 0.17 A for backbone atoms (N, C alpha, C = O) and 1.51 +/- 0.13 A for all atoms. The backbone RMSD for an ensemble of 37 structures for apoE(267-289) is 0.74 +/- 0.21 A for the region 268-275 and 0.34 +/- 0.10 A for the region 276-286. A two-domain structure was found for apoE(267-289) with the C-terminal half adopting a very well defined helix and the N-terminal segment 268-275 a less well defined helix, suggesting that the N-terminus may weakly bind to SDS. For apoE(263-286), an amphipathic helix-bend-helix structural motif was found with all hydrophobic side chains on the concave face. The existence of a bend around residues Q273 to G278 is consistent with their temperature coefficients of amide protons as well as secondary shifts of alpha-protons. Comparison of the structures of the two peptides revealed that the enhanced binding of apoE(263-286) to lipid could be attributed to the formation of a hydrophobic cluster consisting of residues W264, F265, L268, and V269. Aromatic side chains are proposed to be especially important in anchoring apolipoprotein fragments to micelles.


    Organizational Affiliation

    Institute of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
APOLIPOPROTEIN E A24Homo sapiensMutation(s): 0 
Gene Names: APOE
Find proteins for P02649 (Homo sapiens)
Explore P02649 
Go to UniProtKB:  P02649
NIH Common Fund Data Resources
PHAROS:  P02649
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1OEF Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance