4MIG

Pyranose 2-oxidase from Phanerochaete chrysosporium, recombinant wild type


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structures of Phanerochaete chrysosporium pyranose 2-oxidase suggest that the N-terminus acts as a propeptide that assists in homotetramer assembly.

Hassan, N.Tan, T.C.Spadiut, O.Pisanelli, I.Fusco, L.Haltrich, D.Peterbauer, C.K.Divne, C.

(2013) FEBS Open Bio 3: 496-504

  • DOI: 10.1016/j.fob.2013.10.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The flavin-dependent homotetrameric enzyme pyranose 2-oxidase (P2O) is found mostly, but not exclusively, in lignocellulose-degrading fungi where it catalyzes the oxidation of β-d-glucose to the corresponding 2-keto sugar concomitantly with hydrogen ...

    The flavin-dependent homotetrameric enzyme pyranose 2-oxidase (P2O) is found mostly, but not exclusively, in lignocellulose-degrading fungi where it catalyzes the oxidation of β-d-glucose to the corresponding 2-keto sugar concomitantly with hydrogen peroxide formation during lignin solubilization. Here, we present crystal structures of P2O from the efficient lignocellulolytic basidiomycete Phanerochaete chrysosporium. Structures were determined of wild-type PcP2O from the natural fungal source, and two variants of recombinant full-length PcP2O, both in complex with the slow substrate 3-deoxy-3-fluoro-β-d-glucose. The active sites in PcP2O and P2O from Trametes multicolor (TmP2O) are highly conserved with identical substrate binding. Our structural analysis suggests that the 17 °C higher melting temperature of PcP2O compared to TmP2O is due to an increased number of intersubunit salt bridges. The structure of recombinant PcP2O expressed with its natural N-terminal sequence, including a proposed propeptide segment, reveals that the first five residues of the propeptide intercalate at the interface between A and B subunits to form stabilizing, mainly hydrophobic, interactions. In the structure of mature PcP2O purified from the natural source, the propeptide segment in subunit A has been replaced by a nearby loop in the B subunit. We propose that the propeptide in subunit A stabilizes the A/B interface of essential dimers in the homotetramer and that, upon maturation, it is replaced by the loop in the B subunit to form the mature subunit interface. This would imply that the propeptide segment of PcP2O acts as an intramolecular chaperone for oligomerization at the A/B interface of the essential dimer.


    Organizational Affiliation

    KTH Royal Institute of Technology, School of Biotechnology, Albanova University Center, Roslagstullsbacken 21, S-10691 StockholmSweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pyranose 2-oxidase
A, B, C, D
648Phanerochaete chrysosporiumMutation(s): 0 
Gene Names: p2ox (pox)
EC: 1.1.3.10
Find proteins for Q6QWR1 (Phanerochaete chrysosporium)
Go to UniProtKB:  Q6QWR1
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, B, C, D
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
G3F
Query on G3F

Download SDF File 
Download CCD File 
A, B, C, D
3-deoxy-3-fluoro-beta-D-glucopyranose
C6 H11 F O5
BUMRBAMACDBPKO-AIECOIEWSA-N
 Ligand Interaction
FDA
Query on FDA

Download SDF File 
Download CCD File 
A, B, C, D
DIHYDROFLAVINE-ADENINE DINUCLEOTIDE
C27 H35 N9 O15 P2
YPZRHBJKEMOYQH-UYBVJOGSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.173 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 89.544α = 90.00
b = 166.448β = 106.41
c = 91.844γ = 90.00
Software Package:
Software NamePurpose
MAR345data collection
XSCALEdata scaling
XDSdata reduction
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-12-11
    Type: Initial release
  • Version 1.1: 2017-11-15
    Type: Data collection, Refinement description