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THE STRUCTURE OF GLUTATHIONE REDUCTASE FROM ESCHERICHIA COLI AT 1.86 ANGSTROMS RESOLUTION: COMPARISON WITH THE ENZYME FROM HUMAN ERYTHROCYTES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Work: 0.168 

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This is version 1.2 of the entry. See complete history

Literature

Structure of glutathione reductase from Escherichia coli at 1.86 A resolution: comparison with the enzyme from human erythrocytes.

Mittl, P.R.Schulz, G.E.

(1994) Protein Sci. 3: 799-809

  • DOI: 10.1002/pro.5560030509

  • PubMed Abstract: 
  • The crystal structure of the dimeric flavoenzyme glutathione reductase from Escherichia coli was determined and refined to an R-factor of 16.8% at 1.86 A resolution. The molecular 2-fold axis of the dimer is local but very close to a possible crystal ...

    The crystal structure of the dimeric flavoenzyme glutathione reductase from Escherichia coli was determined and refined to an R-factor of 16.8% at 1.86 A resolution. The molecular 2-fold axis of the dimer is local but very close to a possible crystallographic 2-fold axis; the slight asymmetry could be rationalized from the packing contacts. The 2 crystallographically independent subunits of the dimer are virtually identical, yielding no structural clue on possible cooperativity. The structure was compared with the well-known structure of the homologous enzyme from human erythrocytes with 52% sequence identity. Significant differences were found at the dimer interface, where the human enzyme has a disulfide bridge, whereas the E. coli enzyme has an antiparallel beta-sheet connecting the subunits. The differences at the glutathione binding site and in particular a deformation caused by a Leu-Ile exchange indicate why the E. coli enzyme accepts trypanothione much better than the human enzyme. The reported structure provides a frame for explaining numerous published engineering results in detail and for guiding further ones.


    Organizational Affiliation

    Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität, Freiburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTATHIONE REDUCTASE
A, B
450Escherichia coli (strain K12)Gene Names: gor
EC: 1.8.1.7
Find proteins for P06715 (Escherichia coli (strain K12))
Go to UniProtKB:  P06715
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Work: 0.168 
  • Space Group: P 1 1 21
Unit Cell:
Length (Å)Angle (°)
a = 120.500α = 90.00
b = 73.600β = 90.00
c = 60.500γ = 83.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-11-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance