6OWT

Structure of SIVsmm Nef and SMM tetherin bound to the clathrin adaptor AP-2 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Basis for Tetherin Antagonism as a Barrier to Zoonotic Lentiviral Transmission.

Buffalo, C.Z.Sturzel, C.M.Heusinger, E.Kmiec, D.Kirchhoff, F.Hurley, J.H.Ren, X.

(2019) Cell Host Microbe 26: 359-368.e8

  • DOI: 10.1016/j.chom.2019.08.002
  • Primary Citation of Related Structures:  
    6OWT

  • PubMed Abstract: 
  • Tetherin is a host defense factor that physically prevents virion release from the plasma membrane. The Nef accessory protein of simian immunodeficiency virus (SIV) engages the clathrin adaptor AP-2 to downregulate tetherin via its DIWK motif. As hum ...

    Tetherin is a host defense factor that physically prevents virion release from the plasma membrane. The Nef accessory protein of simian immunodeficiency virus (SIV) engages the clathrin adaptor AP-2 to downregulate tetherin via its DIWK motif. As human tetherin lacks DIWK, antagonism of tetherin by Nef is a barrier to simian-human transmission of non-human primate lentiviruses. To determine the molecular basis for tetherin counteraction, we reconstituted the AP-2 complex with a simian tetherin and SIV Nef and determined its structure by cryoelectron microscopy (cryo-EM). Nef refolds the first α-helix of the β2 subunit of AP-2 to a β hairpin, creating a binding site for the DIWK sequence. The tetherin binding site in Nef is distinct from those of most other Nef substrates, including MHC class I, CD3, and CD4 but overlaps with the site for the restriction factor SERINC5. This structure explains the dependence of SIVs on tetherin DIWK and consequent barrier to human transmission.


    Organizational Affiliation

    Department of Molecular and Cell Biology and California Institute for Quantitative Biosciences, University of California, Berkeley, Berkeley, CA 94720, USA. Electronic address: snowren@berkeley.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit alphaA939Rattus norvegicusMutation(s): 0 
Gene Names: Ap2a2Adtab
Find proteins for P18484 (Rattus norvegicus)
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Go to UniProtKB:  P18484
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit betaB591Rattus norvegicusMutation(s): 0 
Gene Names: Ap2b1Clapb1
Find proteins for P62944 (Rattus norvegicus)
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Go to UniProtKB:  P62944
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Adaptor protein complex AP-2, mu1M141Mus musculusMutation(s): 0 
Gene Names: Ap2m1Clapm1
Find proteins for P84091 (Mus musculus)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Tetherin,Protein NefNT275Cercocebus atysSimian immunodeficiency virus
This entity is chimeric
Mutation(s): 1 
Gene Names: BST2
Find proteins for Q4JGV0 (Simian immunodeficiency virus)
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Go to UniProtKB:  Q4JGV0
Find proteins for C3VHQ5 (Cercocebus atys)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit sigmaS142Rattus norvegicusMutation(s): 2 
Gene Names: Ap2s1Ap17Claps2
Find proteins for P62744 (Rattus norvegicus)
Explore P62744 
Go to UniProtKB:  P62744
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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 StatesF32 GM125209
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI120691

Revision History 

  • Version 1.0: 2019-09-25
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Author supporting evidence