1EQ1

NMR STRUCTURE OF AN EXCHANGEABLE APOLIPOPROTEIN-MANDUCA SEXTA APOLIPOPHORIN-III


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with acceptable covalent geometry, structures with favorable non-bond energy, structures with the least restraint violations, structures with the lowest energy, target function 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for the conformational adaptability of apolipophorin III, a helix-bundle exchangeable apolipoprotein

Wang, J.Sykes, B.D.Ryan, R.O.

(2002) Proc Natl Acad Sci U S A 99: 1188-1193

  • DOI: 10.1073/pnas.032565999
  • Primary Citation of Related Structures:  
    1EQ1

  • PubMed Abstract: 
  • The high-resolution NMR structure of apolipophorin III from the sphinx moth, Manduca sexta, has been determined in the lipid-free state. We show that lipid-free apolipophorin III adopts a unique helix-bundle topology that has several characteristic structural features ...

    The high-resolution NMR structure of apolipophorin III from the sphinx moth, Manduca sexta, has been determined in the lipid-free state. We show that lipid-free apolipophorin III adopts a unique helix-bundle topology that has several characteristic structural features. These include a marginally stable, up-and-down helix bundle that allows for concerted opening of the bundle about "hinged" loops upon lipid interaction and buried polar/ionizable residues and buried interhelical H-bonds located in the otherwise hydrophobic interior of the bundle that adjust protein stability and facilitate lipid-induced conformational opening. We suggest that these structural features modulate the conformational adaptability of the lipid-free helix bundle upon lipid binding and control return of the open conformation to the original lipid-free helix-bundle state. Taken together, these data provide a structural rationale for the ability of exchangeable apolipoproteins to reversibly interact with circulating lipoprotein particles.


    Related Citations: 
    • Insight into Lipid Surface Recognition and Reversible Conformational Adaptation of an Exchangeable Apolipoprotein by Multidimensional Heteronuclear NMR Techniques
      Wang, J., Gagne, S.M., Sykes, B.D., Ryan, R.O.
      (1997) J Biol Chem 272: 17912

    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, School of Medicine, Southern Illinois University, Carbondale, IL 62901-4413, USA. jwang@siumed.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
APOLIPOPHORIN-IIIA166Manduca sextaMutation(s): 0 
UniProt
Find proteins for P13276 (Manduca sexta)
Explore P13276 
Go to UniProtKB:  P13276
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13276
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with acceptable covalent geometry, structures with favorable non-bond energy, structures with the least restraint violations, structures with the lowest energy, target function 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-02-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-16
    Changes: Database references, Derived calculations