2C3F

The structure of a group A streptococcal phage-encoded tail-fibre showing hyaluronan lyase activity.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of a Group a Streptococcal Phage-Encoded Virulence Factor Reveals Catalytically Active Triple-Stranded Beta-Helix

Smith, N.L.Taylor, E.J.Linsay, A.-M.Charnock, S.J.Turkenburg, J.P.Dodson, E.J.Davies, G.J.Black, G.W.

(2005) Proc Natl Acad Sci U S A 102: 17652

  • DOI: 10.1073/pnas.0504782102
  • Primary Citation of Related Structures:  
    2C3F

  • PubMed Abstract: 
  • Streptococcus pyogenes (group A Streptococcus) causes severe invasive infections including scarlet fever, pharyngitis (streptococcal sore throat), skin infections, necrotizing fasciitis (flesh-eating disease), septicemia, erysipelas, cellulitis, acut ...

    Streptococcus pyogenes (group A Streptococcus) causes severe invasive infections including scarlet fever, pharyngitis (streptococcal sore throat), skin infections, necrotizing fasciitis (flesh-eating disease), septicemia, erysipelas, cellulitis, acute rheumatic fever, and toxic shock. The conversion from nonpathogenic to toxigenic strains of S. pyogenes is frequently mediated by bacteriophage infection. One of the key bacteriophage-encoded virulence factors is a putative "hyaluronidase," HylP1, a phage tail-fiber protein responsible for the digestion of the S. pyogenes hyaluronan capsule during phage infection. Here we demonstrate that HylP1 is a hyaluronate lyase. The 3D structure, at 1.8-angstroms resolution, reveals an unusual triple-stranded beta-helical structure and provides insight into the structural basis for phage tail assembly and the role of phage tail proteins in virulence. Unlike the triple-stranded beta-helix assemblies of the bacteriophage T4 injection machinery and the tailspike endosialidase of the Escherichia coli K1 bacteriophage K1F, HylP1 possesses three copies of the active center on the triple-helical fiber itself without the need for an accessory catalytic domain. The triple-stranded beta-helix is not simply a structural scaffold, as previously envisaged; it is harnessed to provide a 200-angstroms-long substrate-binding groove for the optimal reduction in hyaluronan viscosity to aid phage penetration of the capsule.


    Organizational Affiliation

    Chemical Biology Research Group, School of Applied Sciences, Northumbria University, Newcastle upon Tyne NE1 8ST, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HYALURONIDASE, PHAGE ASSOCIATEDA358Streptococcus pyogenesMutation(s): 0 
EC: 4.2.2.1
Find proteins for Q9A0M7 (Streptococcus pyogenes serotype M1)
Explore Q9A0M7 
Go to UniProtKB:  Q9A0M7
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.534α = 90
b = 58.534β = 90
c = 586.585γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SHELXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-29
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance