3SVL

Structural basis of the improvement of ChrR - a multi-purpose enzyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal Structure of ChrR-A Quinone Reductase with the Capacity to Reduce Chromate.

Eswaramoorthy, S.Poulain, S.Hienerwadel, R.Bremond, N.Sylvester, M.D.Zhang, Y.B.Berthomieu, C.Van Der Lelie, D.Matin, A.

(2012) Plos One 7: e36017-e36017

  • DOI: 10.1371/journal.pone.0036017

  • PubMed Abstract: 
  • The Escherichia coli ChrR enzyme is an obligatory two-electron quinone reductase that has many applications, such as in chromate bioremediation. Its crystal structure, solved at 2.2 Å resolution, shows that it belongs to the flavodoxin superfamily in ...

    The Escherichia coli ChrR enzyme is an obligatory two-electron quinone reductase that has many applications, such as in chromate bioremediation. Its crystal structure, solved at 2.2 Å resolution, shows that it belongs to the flavodoxin superfamily in which flavin mononucleotide (FMN) is firmly anchored to the protein. ChrR crystallized as a tetramer, and size exclusion chromatography showed that this is the oligomeric form that catalyzes chromate reduction. Within the tetramer, the dimers interact by a pair of two hydrogen bond networks, each involving Tyr128 and Glu146 of one dimer and Arg125 and Tyr85 of the other; the latter extends to one of the redox FMN cofactors. Changes in each of these amino acids enhanced chromate reductase activity of the enzyme, showing that this network is centrally involved in chromate reduction.


    Organizational Affiliation

    Department of Biology, Brookhaven National Laboratory, Upton, New York, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
protein yieF
A, B
193Escherichia coli (strain K12)Gene Names: chrR (yieF)
EC: 1.6.5.2
Find proteins for P0AGE6 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AGE6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN

Download SDF File 
Download CCD File 
A, B
FLAVIN MONONUCLEOTIDE
RIBOFLAVIN MONOPHOSPHATE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.237 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 107.255α = 90.00
b = 107.255β = 90.00
c = 128.251γ = 120.00
Software Package:
Software NamePurpose
CBASSdata collection
HKL-2000data reduction
MOLREPphasing
CNSrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release