2XNX

BC1 fragment of streptococcal M1 protein in complex with human fibrinogen

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.277 
  • R-Value Observed: 0.279 

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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, D, G, J87Homo sapiensMutation(s): 0 
Gene Names: FGA
UniProt & NIH Common Fund Data Resources
Find proteins for P02671 (Homo sapiens)
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Go to UniProtKB:  P02671
PHAROS:  P02671
GTEx:  ENSG00000171560 
Entity Groups  
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UniProt GroupP02671
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FIBRINOGEN BETA CHAINB, E, H, K328Homo sapiensMutation(s): 0 
Gene Names: FGB
UniProt & NIH Common Fund Data Resources
Find proteins for P02675 (Homo sapiens)
Explore P02675 
Go to UniProtKB:  P02675
PHAROS:  P02675
GTEx:  ENSG00000171564 
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UniProt GroupP02675
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
FIBRINOGEN GAMMA CHAINC, F, I, L319Homo sapiensMutation(s): 0 
Gene Names: FGG, PRO2061
UniProt & NIH Common Fund Data Resources
Find proteins for P02679 (Homo sapiens)
Explore P02679 
Go to UniProtKB:  P02679
PHAROS:  P02679
GTEx:  ENSG00000171557 
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UniProt GroupP02679
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
M PROTEINM, N146Streptococcus pyogenesMutation(s): 0 
Entity Groups  
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.277 
  • R-Value Observed: 0.279 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.723α = 90
b = 216.866β = 102.54
c = 140.807γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata 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