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1.9A Crystal Structure of the protein isdG from Staphylococcus aureus aureus, Structural genomics, MCSG


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Staphylococcus aureus IsdG and IsdI, heme-degrading enzymes with structural similarity to monooxygenases.

Wu, R.Skaar, E.P.Zhang, R.Joachimiak, G.Gornicki, P.Schneewind, O.Joachimiak, A.

(2005) J.Biol.Chem. 280: 2840-2846

  • DOI: 10.1074/jbc.M409526200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Heme-degrading enzymes are involved in human diseases ranging from stroke, cancer, and multiple sclerosis to infectious diseases such as malaria, diphtheria, and meningitis. All mammalian and microbial enzymes identified to date are members of the he ...

    Heme-degrading enzymes are involved in human diseases ranging from stroke, cancer, and multiple sclerosis to infectious diseases such as malaria, diphtheria, and meningitis. All mammalian and microbial enzymes identified to date are members of the heme oxygenase superfamily and assume similar monomeric structures with an all alpha-helical fold. Here we describe the crystal structures of IsdG and IsdI, two heme-degrading enzymes from Staphylococcus aureus. The structures of both enzymes resemble the ferredoxin-like fold and form a beta-barrel at the dimer interface. Two large pockets found on the outside of the barrel contain the putative active sites. Sequence homologs of IsdG and IsdI were identified in multiple Gram-positive pathogens. Substitution of conserved IsdG amino acid residues either reduced or abolished heme degradation, suggesting a common catalytic mechanism. This mechanism of IsdG-mediated heme degradation may be similar to that of the structurally related monooxygenases, enzymes involved in the synthesis of antibiotics in Streptomyces. Our results imply the evolutionary adaptation of microbial enzymes to unique environments.


    Organizational Affiliation

    Structural Biology Center and Midwest Center for Structural Genomics, Biosciences Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
hypothetical protein isdG
A, B, C, D
109Staphylococcus aureus (strain MW2)Mutation(s): 0 
Gene Names: isdG
EC: 1.14.99.48
Find proteins for Q8NX62 (Staphylococcus aureus (strain MW2))
Go to UniProtKB:  Q8NX62
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.742α = 90.00
b = 66.779β = 105.18
c = 67.678γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
HKL-2000data scaling
CNSrefinement
SBC-Collectdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-10-12
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance