3TSI

Structure of the parainfluenza virus 5 (PIV5) hemagglutinin-neuraminidase (HN) stalk domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Structure and mutagenesis of the parainfluenza virus 5 hemagglutinin-neuraminidase stalk domain reveals a four-helix bundle and the role of the stalk in fusion promotion.

Bose, S.Welch, B.D.Kors, C.A.Yuan, P.Jardetzky, T.S.Lamb, R.A.

(2011) J Virol 85: 12855-12866

  • DOI: https://doi.org/10.1128/JVI.06350-11
  • Primary Citation of Related Structures:  
    3TSI

  • PubMed Abstract: 

    Paramyxovirus entry into cells requires the fusion protein (F) and a receptor binding protein (hemagglutinin-neuraminidase [HN], H, or G). The multifunctional HN protein of some paramyxoviruses, besides functioning as the receptor (sialic acid) binding protein (hemagglutinin activity) and the receptor-destroying protein (neuraminidase activity), enhances F activity, presumably by lowering the activation energy required for F to mediate fusion of viral and cellular membranes. Before or upon receptor binding by the HN globular head, F is believed to interact with the HN stalk. Unfortunately, until recently none of the receptor binding protein crystal structures have shown electron density for the stalk domain. Parainfluenza virus 5 (PIV5) HN exists as a noncovalent dimer-of-dimers on the surface of cells, linked by a single disulfide bond in the stalk. Here we present the crystal structure of the PIV5-HN stalk domain at a resolution of 2.65 Å, revealing a four-helix bundle (4HB) with an upper (N-terminal) straight region and a lower (C-terminal) supercoiled part. The hydrophobic core residues are a mix of an 11-mer repeat and a 3- to 4-heptad repeat. To functionally characterize the role of the HN stalk in F interactions and fusion, we designed mutants along the PIV5-HN stalk that are N-glycosylated to physically disrupt F-HN interactions. By extensive study of receptor binding, neuraminidase activity, oligomerization, and fusion-promoting functions of the mutant proteins, we found a correlation between the position of the N-glycosylation mutants on the stalk structure and their neuraminidase activities as well as their abilities to promote fusion.


  • Organizational Affiliation

    Department of Molecular Biosciences, Northwestern University, 2205 Tech Drive, Evanston, IL 60208-3500, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hemagglutinin-neuraminidase
A, B, C, D
65Simian virus 5 (strain W3)Mutation(s): 0 
Gene Names: HN
EC: 3.2.1.18
UniProt
Find proteins for P04850 (Parainfluenza virus 5 (strain W3))
Explore P04850 
Go to UniProtKB:  P04850
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04850
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.65 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.276α = 90
b = 101.276β = 90
c = 85.713γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-10-26
    Type: Initial release
  • Version 1.1: 2011-12-14
    Changes: Database references
  • Version 1.2: 2015-10-21
    Changes: Source and taxonomy
  • Version 1.3: 2017-11-08
    Changes: Refinement description
  • Version 1.4: 2023-09-13
    Changes: Data collection, Database references, Refinement description