3F9P

Crystal structure of myeloperoxidase from human leukocytes


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.93 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Essential role of proximal histidine-asparagine interaction in Mammalian peroxidases.

Carpena, X.Vidossich, P.Schroettner, K.Calisto, B.M.Banerjee, S.Stampler, J.Soudi, M.Furtmuller, P.G.Rovira, C.Fita, I.Obinger, C.

(2009) J.Biol.Chem. 284: 25929-25937

  • DOI: 10.1074/jbc.M109.002154

  • PubMed Abstract: 
  • In heme enzymes belonging to the peroxidase-cyclooxygenase superfamily the proximal histidine is in close interaction with a fully conserved asparagine. The crystal structure of a mixture of glycoforms of myeloperoxidase (MPO) purified from granules ...

    In heme enzymes belonging to the peroxidase-cyclooxygenase superfamily the proximal histidine is in close interaction with a fully conserved asparagine. The crystal structure of a mixture of glycoforms of myeloperoxidase (MPO) purified from granules of human leukocytes prompted us to revise the orientation of this asparagine and the protonation status of the proximal histidine. The data we present contrast with previous MPO structures, but are strongly supported by molecular dynamics simulations. Moreover, comprehensive analysis of published lactoperoxidase structures suggest that the described proximal heme architecture is a general structural feature of animal heme peroxidases. Its importance is underlined by the fact that the MPO variant N421D, recombinantly expressed in mammalian cell lines, exhibited modified spectral properties and diminished catalytic activity compared with wild-type recombinant MPO. It completely lost its ability to oxidize chloride to hypochlorous acid, which is a characteristic feature of MPO and essential for its role in host defense. The presented crystal structure of MPO revealed further important differences compared with the published structures including the extent of glycosylation, interaction between light and heavy polypeptides, as well as heme to protein covalent bonds. These data are discussed with respect to biosynthesis and post-translational maturation of MPO as well as to its peculiar biochemical and biophysical properties.


    Organizational Affiliation

    Institute of Research in Biomedicine (IRB-Barcelona), Parc Científic, Baldiri i Reixac 10, 08028 Barcelona, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myeloperoxidase
A, B
114Homo sapiensMutation(s): 0 
Gene Names: MPO
EC: 1.11.2.2
Find proteins for P05164 (Homo sapiens)
Go to Gene View: MPO
Go to UniProtKB:  P05164
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Myeloperoxidase
C, D
467Homo sapiensMutation(s): 0 
Gene Names: MPO
EC: 1.11.2.2
Find proteins for P05164 (Homo sapiens)
Go to Gene View: MPO
Go to UniProtKB:  P05164
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

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C, D
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CL
Query on CL

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A, D
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

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C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
FUC
Query on FUC

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C, D
ALPHA-L-FUCOSE
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
BMA
Query on BMA

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C, D
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
HEM
Query on HEM

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A, B
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
NAG
Query on NAG

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C, D
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
C, D
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.93 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.236 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 110.740α = 90.00
b = 110.740β = 90.00
c = 255.333γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
DENZOdata reduction
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance