3DUZ | pdb_00003duz

Crystal structure of the postfusion form of baculovirus fusion protein GP64

• PDB DOI: https://doi.org/10.2210/pdb3DUZ/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Autographa californica nucleopolyhedrovirus
• Expression System: Spodoptera frugiperda
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 2008-07-18 Released: 2008-09-16 
• Deposition Author(s): Kadlec, J., Loureiro, S., Abrescia, N.G.A., Jones, I.M., Stuart, D.I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.95 Å
• R-Value Free: 
  0.270 (Depositor), 0.268 (DCC) 
• R-Value Work: 
  0.224 (Depositor), 0.221 (DCC) 
• R-Value Observed: 
  0.226 (Depositor) 

Literature

The postfusion structure of baculovirus gp64 supports a unified view of viral fusion machines.

Kadlec, J., Loureiro, S., Abrescia, N.G., Stuart, D.I., Jones, I.M.

(2008) Nat Struct Mol Biol 15: 1024-1030

• PubMed: 18776902 
• DOI: https://doi.org/10.1038/nsmb.1484
• Primary Citation Related Structures: 
  3DUZ


• PubMed Abstract: 
  

  Viral fusion proteins mediate the merger of host and viral membranes during cell entry for all enveloped viruses. Baculovirus glycoprotein gp64 (gp64) is unusual in promoting entry into both insect and mammalian cells and is distinct from established class I and class II fusion proteins. We report the crystal structure of its postfusion form, which explains a number of gp64's biological properties including its cellular promiscuity, identifies the fusion peptides and shows it to be the third representative of a new class (III) of fusion proteins with unexpected structural homology with vesicular stomatitis virus G and herpes simplex virus type 1 gB proteins. We show that domains of class III proteins have counterparts in both class I and II proteins, suggesting that all these viral fusion machines are structurally more related than previously thought.

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Organizational Affiliation: 
• Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, UK.

Biological Assembly 1  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 56.88 kDa 
• Atom Count: 3,365 
• Modeled Residue Count: 418 
• Deposited Residue Count: 487 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Major envelope glycoprotein	A	487	Autographa californica nucleopolyhedrovirus	Mutation(s): 0  Gene Names: GP67, P67 Membrane Entity: Yes
UniProt
Find proteins for P17501 (Autographa californica nuclear polyhedrosis virus) Explore P17501  Go to UniProtKB:  P17501

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HG	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	MERCURY (II) ION Hg BQPIGGFYSBELGY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.95 Å
• R-Value Free:  0.270 (Depositor), 0.268 (DCC) 
• R-Value Work:  0.224 (Depositor), 0.221 (DCC) 
• R-Value Observed: 0.226 (Depositor) 

Space Group: H 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 87.47	α = 90
b = 87.47	β = 90
c = 431.59	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DNA	data collection
XDS	data reduction
XSCALE	data scaling
SHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-09-16 
Deposition Author(s): Kadlec, J., Loureiro, S., Abrescia, N.G.A., Jones, I.M., Stuart, D.I.

Revision History  

• Version 1.0: 2008-09-16
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-10-30
  Changes: Data collection, Database references, Derived calculations, Structure summary