5L1X

Structure of the Human Metapneumovirus Fusion Protein in the Postfusion Conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Engineering, Structure and Immunogenicity of the Human Metapneumovirus F Protein in the Postfusion Conformation.

Mas, V.Rodriguez, L.Olmedillas, E.Cano, O.Palomo, C.Terron, M.C.Luque, D.Melero, J.A.McLellan, J.S.

(2016) Plos Pathog. 12: e1005859-e1005859

  • DOI: 10.1371/journal.ppat.1005859

  • PubMed Abstract: 
  • Human metapneumovirus (hMPV) is a paramyxovirus that is a common cause of bronchiolitis and pneumonia in children less than five years of age. The hMPV fusion (F) glycoprotein is the primary target of neutralizing antibodies and is thus a critical va ...

    Human metapneumovirus (hMPV) is a paramyxovirus that is a common cause of bronchiolitis and pneumonia in children less than five years of age. The hMPV fusion (F) glycoprotein is the primary target of neutralizing antibodies and is thus a critical vaccine antigen. To facilitate structure-based vaccine design, we stabilized the ectodomain of the hMPV F protein in the postfusion conformation and determined its structure to a resolution of 3.3 Å by X-ray crystallography. The structure resembles an elongated cone and is very similar to the postfusion F protein from the related human respiratory syncytial virus (hRSV). In contrast, significant differences were apparent with the postfusion F proteins from other paramyxoviruses, such as human parainfluenza type 3 (hPIV3) and Newcastle disease virus (NDV). The high similarity of hMPV and hRSV postfusion F in two antigenic sites targeted by neutralizing antibodies prompted us to test for antibody cross-reactivity. The widely used monoclonal antibody 101F, which binds to antigenic site IV of hRSV F, was found to cross-react with hMPV postfusion F and neutralize both hRSV and hMPV. Despite the cross-reactivity of 101F and the reported cross-reactivity of two other antibodies, 54G10 and MPE8, we found no detectable cross-reactivity in the polyclonal antibody responses raised in mice against the postfusion forms of either hMPV or hRSV F. The postfusion-stabilized hMPV F protein did, however, elicit high titers of hMPV-neutralizing activity, suggesting that it could serve as an effective subunit vaccine. Structural insights from these studies should be useful for designing novel immunogens able to induce wider cross-reactive antibody responses.


    Organizational Affiliation

    Unidad de Biología Viral, Centro Nacional de Microbiología and CIBER de Enfermedades Respiratorias, Instituto de Salud Carlos III, Majadahonda, Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
hMPV F2 subunit
A, C, E, G, I, K
89Human metapneumovirusMutation(s): 0 
Gene Names: F
Find proteins for Q91F55 (Human metapneumovirus)
Go to UniProtKB:  Q91F55
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
hMPV F1 subunit
B, D, F, H, J, L
387Human metapneumovirusMutation(s): 0 
Gene Names: F
Find proteins for Q91F55 (Human metapneumovirus)
Go to UniProtKB:  Q91F55
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, D, F, H, J
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
FUC
Query on FUC

Download SDF File 
Download CCD File 
B, C, F, H, L
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
B, C, D, F, H, I, J, L
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 128.720α = 90.00
b = 128.720β = 90.00
c = 572.790γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
iMOSFLMdata reduction
Aimlessdata scaling
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Plan Nacional I+D+iSpainSAF2015-67033-RSAF2012-31217
Plan Nacional I+D+iSpainBFU 2013-43149-R
National Institutes of Health/National Institute of General Medical SciencesUnited StatesP20GM113132

Revision History 

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2016-09-21
    Type: Database references
  • Version 1.2: 2017-09-13
    Type: Author supporting evidence, Derived calculations