2ATJ

RECOMBINANT HORSERADISH PEROXIDASE COMPLEX WITH BENZHYDROXAMIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 

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This is version 1.2 of the entry. See complete history


Literature

Structural interactions between horseradish peroxidase C and the substrate benzhydroxamic acid determined by X-ray crystallography.

Henriksen, A.Schuller, D.J.Meno, K.Welinder, K.G.Smith, A.T.Gajhede, M.

(1998) Biochemistry 37: 8054-8060

  • DOI: 10.1021/bi980234j
  • Primary Citation of Related Structures:  
    2ATJ

  • PubMed Abstract: 
  • The three-dimensional structure of recombinant horseradish peroxidase in complex with BHA (benzhydroxamic acid) is the first structure of a peroxidase-substrate complex demonstrating the existence of an aromatic binding pocket. The crystal structure of the peroxidase-substrate complex has been determined to 2 ...

    The three-dimensional structure of recombinant horseradish peroxidase in complex with BHA (benzhydroxamic acid) is the first structure of a peroxidase-substrate complex demonstrating the existence of an aromatic binding pocket. The crystal structure of the peroxidase-substrate complex has been determined to 2.0 A resolution with a crystallographic R-factor of 0.176 (R-free = 0. 192). A well-defined electron density for BHA is observed in the peroxidase active site, with a hydrophobic pocket surrounding the aromatic ring of the substrate. The hydrophobic pocket is provided by residues H42, F68, G69, A140, P141, and F179 and heme C18, C18-methyl, and C20, with the shortest distance (3.7 A) found between heme C18-methyl and BHA C63. Very little structural rearrangement is seen in the heme crevice in response to substrate binding. F68 moves to form a lid on the hydrophobic pocket, and the distal water molecule moves 0.6 A toward the heme iron. The bound BHA molecule forms an extensive hydrogen bonding network with H42, R38, P139, and the distal water molecule 2.6 A above the heme iron. This remarkably good match in hydrogen bond requirements between the catalytic residues of HRPC and BHA makes the extended interaction between BHA and the distal heme crevice of HRPC possible. Indeed, the ability of BHA to bind to peroxidases, which lack a peripheral hydrophobic pocket, suggests that BHA is a general counterpart for the conserved hydrogen bond donors and acceptors of the distal catalytic site. The closest aromatic residue to BHA is F179, which we predict provides an important hydrophobic interaction with more typical peroxidase substrates.


    Related Citations: 
    • Crystal Structure of Horseradish Peroxidase C at 2.15 A Resolution
      Gajhede, M., Schuller, D.J., Henriksen, A., Smith, A.T., Poulos, T.L.
      (1997) Nat Struct Biol 4: 1032
    • Crystallization and Preliminary X-Ray Studies of Recombinant Horseradish Peroxidase
      Henriksen, A., Gajhede, M., Baker, P., Smith, A.T., Burke, J.F.
      (1995) Acta Crystallogr D Biol Crystallogr 51: 121

    Organizational Affiliation

    Department of Chemistry, University of Copenhagen, Denmark.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PEROXIDASE C1AA, B308Armoracia rusticanaMutation(s): 0 
Gene Names: PRXC1AHPRC1
EC: 1.11.1.7
UniProt
Find proteins for P00433 (Armoracia rusticana)
Explore P00433 
Go to UniProtKB:  P00433
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.176 
  • R-Value Observed: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.92α = 90
b = 62.25β = 104.36
c = 77.99γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-01-28
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance