3NWH

Crystal structure of BST2/Tetherin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.260 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and functional studies on the extracellular domain of BST2/tetherin in reduced and oxidized conformations.

Schubert, H.L.Zhai, Q.Sandrin, V.Eckert, D.M.Garcia-Maya, M.Saul, L.Sundquist, W.I.Steiner, R.A.Hill, C.P.

(2010) Proc.Natl.Acad.Sci.USA 107: 17951-17956

  • DOI: 10.1073/pnas.1008206107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • HIV-1 and other enveloped viruses can be restricted by a host cellular protein called BST2/tetherin that prevents release of budded viruses from the cell surface. Mature BST2 contains a small cytosolic region, a predicted transmembrane helix, and an ...

    HIV-1 and other enveloped viruses can be restricted by a host cellular protein called BST2/tetherin that prevents release of budded viruses from the cell surface. Mature BST2 contains a small cytosolic region, a predicted transmembrane helix, and an extracellular domain with a C-terminal GPI anchor. To advance understanding of BST2 function, we have determined a 2.6 Å crystal structure of the extracellular domain of the bacterially expressed recombinant human protein, residues 47-152, under reducing conditions. The structure forms a single long helix that associates as a parallel dimeric coiled coil over its C-terminal two-thirds, while the N-terminal third forms an antiparallel four-helix bundle with another dimer, creating a global tetramer. We also report the 3.45 Å resolution structure of BST2(51-151) prepared by expression as a secreted protein in HEK293T cells. This oxidized construct forms a dimer in the crystal that is superimposable with the reduced protein over the C-terminal two-thirds of the molecule, and its N terminus suggests pronounced flexibility. Hydrodynamic data demonstrated that BST2 formed a stable tetramer under reducing conditions and a dimer when oxidized to form disulfide bonds. A mutation that selectively disrupted the tetramer (L70D) increased protein expression modestly but only reduced antiviral activity by approximately threefold. Our data raise the possibility that BST2 may function as a tetramer at some stage, such as during trafficking, and strongly support a model in which the primary functional state of BST2 is a parallel disulfide-bound coiled coil that displays flexibility toward its N terminus.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112-5650, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bone marrow stromal antigen 2
A, B, C, D
112Homo sapiensMutation(s): 0 
Gene Names: BST2
Find proteins for Q10589 (Homo sapiens)
Go to Gene View: BST2
Go to UniProtKB:  Q10589
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.260 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 26.550α = 90.00
b = 59.584β = 91.56
c = 159.473γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHENIXphasing
SCALEPACKdata scaling
Blu-Icedata collection
DENZOdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Refinement description