2XZ3

BLV TM hairpin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Charge-Surrounded Pockets and Electrostatic Interactions with Small Ions Modulate the Activity of Retroviral Fusion Proteins.

Lamb, D.Schuttelkopf, A.W.Van Aalten, D.M.F.Brighty, D.W.

(2011) PLoS Pathog 7: 1268

  • DOI: 10.1371/journal.ppat.1001268
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Refolding of viral class-1 membrane fusion proteins from a native state to a trimer-of-hairpins structure promotes entry of viruses into cells. Here we present the structure of the bovine leukaemia virus transmembrane glycoprotein (TM) and identify a ...

    Refolding of viral class-1 membrane fusion proteins from a native state to a trimer-of-hairpins structure promotes entry of viruses into cells. Here we present the structure of the bovine leukaemia virus transmembrane glycoprotein (TM) and identify a group of asparagine residues at the membrane-distal end of the trimer-of-hairpins that is strikingly conserved among divergent viruses. These asparagines are not essential for surface display of pre-fusogenic envelope. Instead, substitution of these residues dramatically disrupts membrane fusion. Our data indicate that, through electrostatic interactions with a chloride ion, the asparagine residues promote assembly and profoundly stabilize the fusion-active structures that are required for viral envelope-mediated membrane fusion. Moreover, the BLV TM structure also reveals a charge-surrounded hydrophobic pocket on the central coiled coil and interactions with basic residues that cluster around this pocket are critical to membrane fusion and form a target for peptide inhibitors of envelope function. Charge-surrounded pockets and electrostatic interactions with small ions are common among class-1 fusion proteins, suggesting that small molecules that specifically target such motifs should prevent assembly of the trimer-of-hairpins and be of value as therapeutic inhibitors of viral entry.


    Organizational Affiliation

    The Biomedical Research Institute, College of Medicine, Ninewells Hospital, The University of Dundee, Dundee, UK.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MALTOSE ABC TRANSPORTER PERIPLASMIC PROTEIN, ENVELOPE GLYCOPROTEIN
A
463Escherichia coliBovine leukemia virus
This entity is chimeric
Mutation(s): 0 
Find proteins for Q90M13 (Bovine leukemia virus)
Go to UniProtKB:  Q90M13
Find proteins for D8A942 (Escherichia coli (strain MS 21-1))
Go to UniProtKB:  D8A942
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download CCD File 
A
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
EDO
Query on EDO

Download CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.595α = 90
b = 107.595β = 90
c = 119.17γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-03-02
    Type: Initial release
  • Version 1.1: 2011-12-28
    Changes: Database references, Version format compliance
  • Version 1.2: 2014-03-12
    Changes: Source and taxonomy
  • Version 1.3: 2017-03-15
    Changes: Source and taxonomy