2XNY

A fragment of streptococcal M1 protein in complex with human fibrinogen


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 7.50 Å
  • R-Value Free: 0.408 
  • R-Value Work: 0.424 
  • R-Value Observed: 0.423 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Streptococcal M1 Protein Constructs a Pathological Host Fibrinogen Network

Macheboeuf, P.Buffalo, C.Fu, C.Y.Zinkernagel, A.S.Cole, J.N.Johnson, J.E.Nizet, V.Nizet, V.Ghosh, P.

(2011) Nature 472: 64

  • DOI: 10.1038/nature09967
  • Primary Citation of Related Structures:  
    2XNX, 2XNY

  • PubMed Abstract: 
  • M1 protein, a major virulence factor of the leading invasive strain of group A Streptococcus, is sufficient to induce toxic-shock-like vascular leakage and tissue injury. These events are triggered by the formation of a complex between M1 and fibrinogen that, unlike M1 or fibrinogen alone, leads to neutrophil activation ...

    M1 protein, a major virulence factor of the leading invasive strain of group A Streptococcus, is sufficient to induce toxic-shock-like vascular leakage and tissue injury. These events are triggered by the formation of a complex between M1 and fibrinogen that, unlike M1 or fibrinogen alone, leads to neutrophil activation. Here we provide a structural explanation for the pathological properties of the complex formed between streptococcal M1 and human fibrinogen. A conformationally dynamic coiled-coil dimer of M1 was found to organize four fibrinogen molecules into a specific cross-like pattern. This pattern supported the construction of a supramolecular network that was required for neutrophil activation but was distinct from a fibrin clot. Disruption of this network into other supramolecular assemblies was not tolerated. These results have bearing on the pathophysiology of streptococcal toxic shock.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FIBRINOGEN ALPHA CHAINA, D87Homo sapiensMutation(s): 0 
Gene Names: FGA
Find proteins for P02671 (Homo sapiens)
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Go to UniProtKB:  P02671
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PHAROS:  P02671
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FIBRINOGEN BETA CHAINB, E328Homo sapiensMutation(s): 0 
Gene Names: FGB
Find proteins for P02675 (Homo sapiens)
Explore P02675 
Go to UniProtKB:  P02675
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PHAROS:  P02675
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
FIBRINOGEN GAMMA CHAINC, F319Homo sapiensMutation(s): 0 
Gene Names: FGGPRO2061
Find proteins for P02679 (Homo sapiens)
Explore P02679 
Go to UniProtKB:  P02679
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PHAROS:  P02679
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
M PROTEING [auth M], H [auth N]102Streptococcus pyogenesMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 7.50 Å
  • R-Value Free: 0.408 
  • R-Value Work: 0.424 
  • R-Value Observed: 0.423 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 165.687α = 90
b = 165.687β = 90
c = 289.652γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-04-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance