4U5W

Crystal Structure of HIV-1 Nef-SF2 Core Domain in Complex with the Src Family Kinase Hck SH3-SH2 Tandem Regulatory Domains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 

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This is version 1.4 of the entry. See complete history


Literature

Interaction with the Src Homology (SH3-SH2) Region of the Src-family Kinase Hck Structures the HIV-1 Nef Dimer for Kinase Activation and Effector Recruitment.

Alvarado, J.J.Tarafdar, S.Yeh, J.I.Smithgall, T.E.

(2014) J Biol Chem 289: 28539-28553

  • DOI: 10.1074/jbc.M114.600031
  • Primary Citation of Related Structures:  
    4U5W

  • PubMed Abstract: 
  • HIV-1 Nef supports high titer viral replication in vivo and is essential for AIDS progression. Nef function depends on interactions with multiple host cell effectors, including Hck and other Src-family kinases. Here we describe the x-ray crystal structure of Nef in complex with the Hck SH3-SH2 regulatory region to a resolution of 1 ...

    HIV-1 Nef supports high titer viral replication in vivo and is essential for AIDS progression. Nef function depends on interactions with multiple host cell effectors, including Hck and other Src-family kinases. Here we describe the x-ray crystal structure of Nef in complex with the Hck SH3-SH2 regulatory region to a resolution of 1.86 Å. The complex crystallized as a dimer of complexes, with the conserved Nef PXXPXR motif engaging the Hck SH3 domain. A new intercomplex contact was found between SH3 Glu-93, and Nef Arg-105. Mutagenesis of Hck SH3 Glu-93 interfered with Nef·Hck complex formation and kinase activation in cells. The Hck SH2 domains impinge on the N-terminal region of Nef to stabilize a dimer conformation that exposes Asp-123, a residue critical for Nef function. Our results suggest that in addition to serving as a kinase effector for Nef, Hck binding may reorganize the Nef dimer for functional interaction with other signaling partners.


    Organizational Affiliation

    From the Departments of Microbiology and Molecular Genetics and tsmithga@pitt.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein Nef AC149HIV-1 M:B_ARV2/SF2Mutation(s): 0 
Gene Names: nef
Find proteins for P03407 (Human immunodeficiency virus type 1 group M subtype B (isolate ARV2/SF2))
Explore P03407 
Go to UniProtKB:  P03407
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase HCK BD180Homo sapiensMutation(s): 0 
Gene Names: HCK
EC: 2.7.10.2
Find proteins for P08631 (Homo sapiens)
Explore P08631 
Go to UniProtKB:  P08631
NIH Common Fund Data Resources
PHAROS:  P08631
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.170 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.489α = 112.28
b = 57.265β = 96.09
c = 72.111γ = 106
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI057083
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI102724
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM082251

Revision History  (Full details and data files)

  • Version 1.0: 2014-08-20
    Type: Initial release
  • Version 1.1: 2014-08-27
    Changes: Database references
  • Version 1.2: 2014-10-22
    Changes: Database references
  • Version 1.3: 2017-09-13
    Changes: Advisory, Author supporting evidence, Database references, Derived calculations, Other, Source and taxonomy
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence