2K7Y

Solution fold of HIV-1 Virus protein U cytoplasmic domain in the presence of DPC micelles


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

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Literature

NMR structural characterization of HIV-1 virus protein U cytoplasmic domain in the presence of dodecylphosphatidylcholine micelles

Wittlich, M.Koenig, B.W.Stoldt, M.Schmidt, H.Willbold, D.

(2009) FEBS J 276: 6560-6575

  • DOI: 10.1111/j.1742-4658.2009.07363.x
  • Primary Citation of Related Structures:  
    2K7Y

  • PubMed Abstract: 
  • The HIV-1 encoded virus protein U (VpU) is required for efficient viral release from human host cells and for induction of CD4 degradation in the endoplasmic reticulum. The cytoplasmic domain of the membrane protein VpU (VpUcyt) is essential for the latter activity ...

    The HIV-1 encoded virus protein U (VpU) is required for efficient viral release from human host cells and for induction of CD4 degradation in the endoplasmic reticulum. The cytoplasmic domain of the membrane protein VpU (VpUcyt) is essential for the latter activity. The structure and dynamics of VpUcyt were characterized in the presence of membrane simulating dodecylphosphatidylcholine (DPC) micelles by high-resolution liquid state NMR. VpUcyt is unstructured in aqueous buffer. The addition of DPC micelles induces a well-defined membrane proximal alpha-helix (residues I39-E48) and an additional helical segment (residues L64-R70). A tight loop (L73-V78) is observed close to the C-terminus, whereas the interhelical linker (R49-E63) remains highly flexible. A 3D structure of VpUcyt in the presence of DPC micelles was calculated from a large set of proton-proton distance constraints. The topology of micelle-associated VpUcyt was derived from paramagnetic relaxation enhancement of protein nuclear spins after the introduction of paramagnetic probes into the interior of the micelle or the aqueous buffer. Qualitative analysis of secondary chemical shift and paramagnetic relaxation enhancement data in conjunction with dynamic information from heteronuclear NOEs and structural insight from homonuclear NOE-based distance constraints indicated that micelle-associated VpUcyt retains a substantial degree of structural flexibility.


    Organizational Affiliation

    Institut für Strukturbiologie und Biophysik (ISB-3), Forschungszentrum Jülich, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein VpuA45Human immunodeficiency virus type 1 (SF162 ISOLATE)Mutation(s): 0 
Gene Names: vpu
Find proteins for P19554 (Human immunodeficiency virus type 1 group M subtype B (isolate SF162))
Explore P19554 
Go to UniProtKB:  P19554
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 2K7Y Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance