3BMZ

Violacein biosynthetic enzyme VioE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.21 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Violacein Biosynthetic Enzyme VioE Shares a Fold with Lipoprotein Transporter Proteins

Ryan, K.S.Balibar, C.J.Turo, K.E.Walsh, C.T.Drennan, C.L.

(2008) J Biol Chem 283: 6467-6475

  • DOI: 10.1074/jbc.M708573200
  • Primary Citation of Related Structures:  
    3BMZ

  • PubMed Abstract: 
  • VioE, an unusual enzyme with no characterized homologues, plays a key role in the biosynthesis of violacein, a purple pigment with antibacterial and cytotoxic properties. Without bound cofactors or metals, VioE, from the bacterium Chromobacterium violaceum, mediates a 1,2 shift of an indole ring and oxidative chemistry to generate prodeoxyviolacein, a precursor to violacein ...

    VioE, an unusual enzyme with no characterized homologues, plays a key role in the biosynthesis of violacein, a purple pigment with antibacterial and cytotoxic properties. Without bound cofactors or metals, VioE, from the bacterium Chromobacterium violaceum, mediates a 1,2 shift of an indole ring and oxidative chemistry to generate prodeoxyviolacein, a precursor to violacein. Our 1.21 A resolution structure of VioE shows that the enzyme shares a core fold previously described for lipoprotein transporter proteins LolA and LolB. For both LolB and VioE, a bound polyethylene glycol molecule suggests the location of the binding and/or active site of the protein. Mutations of residues near the bound polyethylene glycol molecule in VioE have identified the active site and five residues important for binding or catalysis. This structural and mutagenesis study suggests that VioE acts as a catalytic chaperone, using a fold previously associated with lipoprotein transporters to catalyze the production of its prodeoxyviolacein product.


    Organizational Affiliation

    Department of Biology and Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative uncharacterized proteinA, B199Chromobacterium violaceum ATCC 12472Mutation(s): 0 
Gene Names: VioECV_3270
Find proteins for Q7NSZ5 (Chromobacterium violaceum (strain ATCC 12472 / DSM 30191 / JCM 1249 / NBRC 12614 / NCIMB 9131 / NCTC 9757))
Explore Q7NSZ5 
Go to UniProtKB:  Q7NSZ5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4

Download Ideal Coordinates CCD File 
C [auth A]TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download Ideal Coordinates CCD File 
D [auth B]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.21 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.527α = 90
b = 82.477β = 90
c = 90.633γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-01-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance