1TQ5

Crystal Structure of YhhW from Escherichia coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and biochemical analysis reveal pirins to possess quercetinase activity.

Adams, M.Jia, Z.

(2005) J.Biol.Chem. 280: 28675-28682

  • DOI: 10.1074/jbc.M501034200

  • PubMed Abstract: 
  • Pirin is a recently identified eukaryotic protein implicated in transcriptional activation and apoptosis. Homologues of Pirin are highly conserved in both prokaryotes and eukaryotes, but their function remains poorly understood. We present here the c ...

    Pirin is a recently identified eukaryotic protein implicated in transcriptional activation and apoptosis. Homologues of Pirin are highly conserved in both prokaryotes and eukaryotes, but their function remains poorly understood. We present here the crystal structure of the yhhW gene product, a putative Pirin homologue, from Escherichia coli and confirm its structural similarity to Pirin. The YhhW protein displays a bicupin fold with a single N-terminal metal coordination site. Molecular surface comparisons of YhhW and Pirin with structurally similar proteins suggested quercetin as a potential ligand. We demonstrate that both bacterial and human Pirins have quercetinase activity, which is inhibited by the addition of typical inhibitors of the quercetin 2,3-dioxygenase reaction. We also demonstrate the release of carbon monoxide as a reaction product. This is the first report of enzymatic activity for any member of the Pirin family and may be an important connection to their roles in transcriptional regulation.


    Organizational Affiliation

    Department of Biochemistry, Queen's University, Kingston, Ontario K7L 3N6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein yhhW
A
242Escherichia coli (strain K12)Gene Names: yhhW
EC: 1.13.11.24
Find proteins for P46852 (Escherichia coli (strain K12))
Go to UniProtKB:  P46852
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CD
Query on CD

Download SDF File 
Download CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.197 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 62.769α = 90.00
b = 62.769β = 90.00
c = 98.053γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement
DENZOdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance