3SZK

Crystal Structure of Human metHaemoglobin Complexed with the First NEAT Domain of IsdH from Staphylococcus aureus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for hemoglobin capture by Staphylococcus aureus cell-surface protein, IsdH

Krishna Kumar, K.Jacques, D.A.Pishchany, G.Caradoc-Davies, T.Spirig, T.Malmirchegini, G.R.Langley, D.B.Dickson, C.F.Mackay, J.P.Clubb, R.T.Skaar, E.P.Guss, J.M.Gell, D.A.

(2011) J.Biol.Chem. 286: 38439-38447

  • DOI: 10.1074/jbc.M111.287300

  • PubMed Abstract: 
  • Pathogens must steal iron from their hosts to establish infection. In mammals, hemoglobin (Hb) represents the largest reservoir of iron, and pathogens express Hb-binding proteins to access this source. Here, we show how one of the commonest and most ...

    Pathogens must steal iron from their hosts to establish infection. In mammals, hemoglobin (Hb) represents the largest reservoir of iron, and pathogens express Hb-binding proteins to access this source. Here, we show how one of the commonest and most significant human pathogens, Staphylococcus aureus, captures Hb as the first step of an iron-scavenging pathway. The x-ray crystal structure of Hb bound to a domain from the Isd (iron-regulated surface determinant) protein, IsdH, is the first structure of a Hb capture complex to be determined. Surface mutations in Hb that reduce binding to the Hb-receptor limit the capacity of S. aureus to utilize Hb as an iron source, suggesting that Hb sequence is a factor in host susceptibility to infection. The demonstration that pathogens make highly specific recognition complexes with Hb raises the possibility of developing inhibitors of Hb binding as antibacterial agents.


    Organizational Affiliation

    School of Molecular Bioscience, University of Sydney, New South Wales 2006, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit alpha
D, A
141Homo sapiensMutation(s): 0 
Gene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens)
Go to Gene View: HBA1 HBA2
Go to UniProtKB:  P69905
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin subunit beta
B, E
146Homo sapiensMutation(s): 0 
Gene Names: HBB
Find proteins for P68871 (Homo sapiens)
Go to Gene View: HBB
Go to UniProtKB:  P68871
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Iron-regulated surface determinant protein H
F, C
164Staphylococcus aureus (strain MW2)Mutation(s): 0 
Gene Names: isdH (harA, sasI)
Find proteins for Q8NW39 (Staphylococcus aureus (strain MW2))
Go to UniProtKB:  Q8NW39
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B, D, E
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.245 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 65.880α = 90.00
b = 123.206β = 90.00
c = 143.933γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data collection
SCALEPACKdata scaling
REFMACrefinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-14
    Type: Initial release
  • Version 1.1: 2012-05-09
    Type: Database references