3TSI

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.651 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.3 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: 10.1128/JVI.06350-11

  • 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) bindi ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemagglutinin-neuraminidase
A, B, C, D
65Parainfluenza virus 5 (strain W3)Mutation(s): 0 
Gene Names: HN
EC: 3.2.1.18
Find proteins for P04850 (Parainfluenza virus 5 (strain W3))
Go to UniProtKB:  P04850
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.651 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.202 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 101.276α = 90.00
b = 101.276β = 90.00
c = 85.713γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
HKL-2000data collection
HKL-2000data scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-10-26
    Type: Initial release
  • Version 1.1: 2011-12-14
    Type: Database references
  • Version 1.2: 2015-10-21
    Type: Source and taxonomy
  • Version 1.3: 2017-11-08
    Type: Refinement description