1D2V

CRYSTAL STRUCTURE OF BROMIDE-BOUND HUMAN MYELOPEROXIDASE ISOFORM C AT PH 5.5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

X-ray crystal structure and characterization of halide-binding sites of human myeloperoxidase at 1.8 A resolution.

Fiedler, T.J.Davey, C.A.Fenna, R.E.

(2000) J.Biol.Chem. 275: 11964-11971

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The x-ray crystal structure of human myeloperoxidase has been extended to 1.8 A resolution, using x-ray data recorded at -180 degrees C (r = 0.197, free r = 0.239). Results confirm that the heme is covalently attached to the protein via two ester lin ...

    The x-ray crystal structure of human myeloperoxidase has been extended to 1.8 A resolution, using x-ray data recorded at -180 degrees C (r = 0.197, free r = 0.239). Results confirm that the heme is covalently attached to the protein via two ester linkages between the carboxyl groups of Glu(242) and Asp(94) and modified methyl groups on pyrrole rings A and C of the heme as well as a sulfonium ion linkage between the sulfur atom of Met(243) and the beta-carbon of the vinyl group on pyrrole ring A. In the native enzyme a bound chloride ion has been identified at the amino terminus of the helix containing the proximal His(336). Determination of the x-ray crystal structure of a myeloperoxidase-bromide complex (r = 0.243, free r = 0.296) has shown that this chloride ion can be replaced by bromide. Bromide is also seen to bind, at partial occupancy, in the distal heme cavity, in close proximity to the distal His(95), where it replaces the water molecule hydrogen bonded to Gln(91). The bromide-binding site in the distal cavity appears to be the halide-binding site responsible for shifts in the Soret band of the absorption spectrum of myeloperoxidase. It is proposed that halide binding to this site inhibits the enzyme by effectively competing with H(2)O(2) for access to the distal histidine, whereas in compound I, the same site may be the halide substrate-binding site.


    Related Citations: 
    • X-Ray Crystal Structure of Canine Myeloperoxidase at 3 Angstrom Resolution
      Zeng, J.,Fenna, R.E.
      (1992) J.Mol.Biol. 226: 185
    • Site-Directed Mutagenesis of Human Myeloperoxidase: Further Identification of Residues Involved in Catalytic Activity and Heme Interaction
      Jacquet, A.,Garcia-Quintana, L.,Deleersnyder, V.,Fenna, R.,Bollen, A.,Moguilevsky, N.
      (1994) Biochem.Biophys.Res.Commun. 202: 73
    • 2.3 Angstrom Resolution X-Ray Crystal Structure of the Bisubstrate Analogue Inhibitor Salicylhydroxamic Acid Bound to Human Myeloperoxidase: A Model for a Prereaction Complex with Hydrogen Peroxide
      Davey, C.A.,Fenna, R.E.
      (1996) Biochemistry 35: 10967
    • Structure of the Green Heme in Myeloperoxidase
      Fenna, R.,Zeng, J.,Davey, C.
      (1995) Arch.Biochem.Biophys. 316: 653


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Miami Medical School, Miami, Florida 33136, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MYELOPEROXIDASE
A, B
104Homo 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
466Homo 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 9 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

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

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A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MAN
Query on MAN

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C, D
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
BR
Query on BR

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A, B
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 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
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
BRKd: 20000000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.243 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 111.155α = 90.00
b = 63.488β = 97.36
c = 92.476γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-24
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2018-01-24
    Type: Database references