4HSI

Glycoprotein B from Herpes simplex virus type 1, A504P/R505G/Q507G/N511G mutant, low-pH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.101 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Extensive Mutagenesis of the HSV-1 gB Ectodomain Reveals Remarkable Stability of Its Postfusion Form.

Vitu, E.Sharma, S.Stampfer, S.D.Heldwein, E.E.

(2013) J.Mol.Biol. 425: 2056-2071

  • DOI: 10.1016/j.jmb.2013.03.001

  • PubMed Abstract: 
  • Viral fusogens mediate the merger of the viral envelope and cellular membrane during viral entry. These proteins share little sequence similarity but all are thought to act by refolding through a series of conformational intermediates from the metast ...

    Viral fusogens mediate the merger of the viral envelope and cellular membrane during viral entry. These proteins share little sequence similarity but all are thought to act by refolding through a series of conformational intermediates from the metastable prefusion form to the stable postfusion form. Crystal structures of both prefusion and postfusion forms have illuminated the conformational pathways of several viral fusogens. By contrast, only the structure of the postfusion form is available for glycoprotein B (gB), the conserved fusogen of herpesviruses. To gain insight into the nature of the fusogenic conformational changes in gB, we used several approaches aimed at engineering the prefusion form of the herpes simplex virus type 1 gB ectodomain, including modifications intended to stabilize the prefusion form and novel mutations aimed at destabilizing the postfusion form. We found that the postfusion conformation of gB is remarkably stable and resistant to perturbations. Several mutations successfully destabilized the gB trimer, identifying regions that are critical for the stability of the postfusion form. Yet, none of the constructs adopted the prefusion conformation. We propose that the soluble ectodomain of gB folds into the postfusion form without first adopting the prefusion intermediate. These results suggest that other regions of gB, including the transmembrane region and the cytoplasmic domain, may be necessary to establish and maintain the metastable prefusion conformation.


    Organizational Affiliation

    Department of Molecular Biology and Microbiology, Tufts University School of Medicine, Boston, MA 02111, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Envelope glycoprotein B
A, B, C, D
703Human herpesvirus 1 (strain KOS)Gene Names: gB
Find proteins for P06437 (Human herpesvirus 1 (strain KOS))
Go to UniProtKB:  P06437
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B, C, D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MRY
Query on MRY

Download SDF File 
Download CCD File 
A, C
MESO-ERYTHRITOL
C4 H10 O4
UNXHWFMMPAWVPI-ZXZARUISSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.101 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.205 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 117.295α = 90.00
b = 117.295β = 90.00
c = 321.872γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction
PHENIXmodel building
PHENIXphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-10-30 
  • Released Date: 2013-03-27 
  • Deposition Author(s): Heldwein, E.E.

Revision History 

  • Version 1.0: 2013-03-27
    Type: Initial release
  • Version 1.1: 2013-05-29
    Type: Database references