4XS0

Human methemoglobin in complex with the second and third NEAT domains of IsdH(F365Y/A369F/Y642A) from Staphylococcus aureus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.261 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

The structure of haemoglobin bound to the haemoglobin receptor IsdH from Staphylococcus aureus shows disruption of the native alpha-globin haem pocket.

Dickson, C.F.Jacques, D.A.Clubb, R.T.Guss, J.M.Gell, D.A.

(2015) Acta Crystallogr D Biol Crystallogr 71: 1295-1306

  • DOI: https://doi.org/10.1107/S1399004715005817
  • Primary Citation of Related Structures:  
    4XS0

  • PubMed Abstract: 

    Staphylococcus aureus is a common and serious cause of infection in humans. The bacterium expresses a cell-surface receptor that binds to, and strips haem from, human haemoglobin (Hb). The binding interface has previously been identified; however, the structural changes that promote haem release from haemoglobin were unknown. Here, the structure of the receptor-Hb complex is reported at 2.6 Å resolution, which reveals a conformational change in the α-globin F helix that disrupts the haem-pocket structure and alters the Hb quaternary interactions. These features suggest potential mechanisms by which the S. aureus Hb receptor induces haem release from Hb.


  • Organizational Affiliation

    University of Tasmania, Hobart, TAS 7000, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit alpha141Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens)
Explore P69905 
Go to UniProtKB:  P69905
PHAROS:  P69905
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69905
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Hemoglobin subunit beta146Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens)
Explore P68871 
Go to UniProtKB:  P68871
PHAROS:  P68871
GTEx:  ENSG00000244734 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68871
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Iron-regulated surface determinant protein H336Staphylococcus aureusMutation(s): 3 
Gene Names: isdHharAsasISAUSA300_1677
UniProt
Find proteins for Q2FG07 (Staphylococcus aureus (strain USA300))
Explore Q2FG07 
Go to UniProtKB:  Q2FG07
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ2FG07
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.55 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.261 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.219α = 90
b = 92.219β = 90
c = 365.116γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
Aimlessdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
iMOSFLMdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-03
    Type: Initial release
  • Version 1.1: 2015-06-17
    Changes: Database references
  • Version 1.2: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Refinement description