3NI0

Crystal Structure of Mouse BST-2/Tetherin Ectodomain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.601 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and Biophysical Analysis of BST-2/Tetherin Ectodomains Reveals an Evolutionary Conserved Design to Inhibit Virus Release.

Swiecki, M.Scheaffer, S.M.Allaire, M.Fremont, D.H.Colonna, M.Brett, T.J.

(2011) J.Biol.Chem. 286: 2987-2997

  • DOI: 10.1074/jbc.M110.190538

  • PubMed Abstract: 
  • BST-2/tetherin is a host antiviral molecule that functions to potently inhibit the release of enveloped viruses from infected cells. In return, viruses have evolved antagonists to this activity. BST-2 traps budding virions by using two separate membr ...

    BST-2/tetherin is a host antiviral molecule that functions to potently inhibit the release of enveloped viruses from infected cells. In return, viruses have evolved antagonists to this activity. BST-2 traps budding virions by using two separate membrane-anchoring regions that simultaneously incorporate into the host and viral membranes. Here, we detailed the structural and biophysical properties of the full-length BST-2 ectodomain, which spans the two membrane anchors. The 1.6-Å crystal structure of the complete mouse BST-2 ectodomain reveals an ∼145-Å parallel dimer in an extended α-helix conformation that predominantly forms a coiled coil bridged by three intermolecular disulfides that are required for stability. Sequence analysis in the context of the structure revealed an evolutionarily conserved design that destabilizes the coiled coil, resulting in a labile superstructure, as evidenced by solution x-ray scattering displaying bent conformations spanning 150 and 180 Å for the mouse and human BST-2 ectodomains, respectively. Additionally, crystal packing analysis revealed possible curvature-sensing tetrameric structures that may aid in proper placement of BST-2 during the genesis of viral progeny. Overall, this extended coiled-coil structure with inherent plasticity is undoubtedly necessary to accommodate the dynamics of viral budding while ensuring separation of the anchors.


    Organizational Affiliation

    Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bone marrow stromal antigen 2
A, B
99Mus musculusMutation(s): 0 
Gene Names: Bst2
Find proteins for Q8R2Q8 (Mus musculus)
Go to UniProtKB:  Q8R2Q8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IPA
Query on IPA

Download SDF File 
Download CCD File 
A
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 33.685α = 90.00
b = 100.831β = 90.00
c = 110.432γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
HKL-2000data reduction
Blu-Icedata collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance