1GVE

Aflatoxin aldehyde reductase (AKR7A1) from Rat Liver


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.38 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Crystal Structure of Rat Liver Akr7A1: A Dimeric Member of the Aldo-Keto Reductase Superfamily

Kozma, E.Brown, E.Ellis, E.M.Lapthorn, A.J.

(2002) J.Biol.Chem. 277: 16285

  • DOI: 10.1074/jbc.M110808200

  • PubMed Abstract: 
  • The structure of the rat liver aflatoxin dialdehyde reductase (AKR7A1) has been solved to 1.38-A resolution. Although it shares a similar alpha/beta-barrel structure with other members of the aldo-keto reductase superfamily, AKR7A1 is the first dimer ...

    The structure of the rat liver aflatoxin dialdehyde reductase (AKR7A1) has been solved to 1.38-A resolution. Although it shares a similar alpha/beta-barrel structure with other members of the aldo-keto reductase superfamily, AKR7A1 is the first dimeric member to be crystallized. The crystal structure also reveals details of the ternary complex as one subunit of the dimer contains NADP(+) and the inhibitor citrate. Although the underlying catalytic mechanism appears similar to other aldo-keto reductases, the substrate-binding pocket contains several charged amino acids (Arg-231 and Arg-327) that distinguish it from previously characterized aldo-keto reductases with respect to size and charge. These differences account for the substrate specificity for 4-carbon acid-aldehydes such as succinic semialdehyde and 2-carboxybenzaldehyde as well as for the idiosyncratic substrate aflatoxin B(1) dialdehyde of this subfamily of enzymes. Structural differences between the AKR7A1 ternary complex and apoenzyme reveal a significant hinged movement of the enzyme involving not only the loops of the structure but also parts of the alpha/beta-barrel most intimately involved in cofactor binding.


    Related Citations: 
    • An Ethoxyquin-Inducible Aldehyde Reductase from Rat Liver that Metabolizes Aflatoxin B1 Defines a Subfamily of Aldo-Keto Reductases
      Ellis, E.M.,Judah, D.J.,Neal, G.E.,Hayes, J.D.
      (1993) Proc.Natl.Acad.Sci.USA 90: 10350


    Organizational Affiliation

    Department of Chemistry, University of Glasgow, Glasgow G12 8QQ, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AFLATOXIN B1 ALDEHYDE REDUCTASE MEMBER 3
A, B
327Rattus norvegicusGene Names: Akr7a3 (Afar, Akr7a1)
EC: 1.-.-.-
Find proteins for P38918 (Rattus norvegicus)
Go to UniProtKB:  P38918
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CIT
Query on CIT

Download SDF File 
Download CCD File 
A
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NAP
Query on NAP

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Download CCD File 
A
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.38 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.158 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 125.540α = 90.00
b = 64.680β = 91.03
c = 112.840γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-27
    Type: Initial release
  • Version 1.1: 2011-09-21
    Type: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance