2PDC

Human aldose reductase mutant F121P complexed with IDD393.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Merging the binding sites of aldose and aldehyde reductase for detection of inhibitor selectivity-determining features.

Steuber, H.Heine, A.Podjarny, A.Klebe, G.

(2008) J Mol Biol 379: 991-1016

  • DOI: 10.1016/j.jmb.2008.03.063
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Inhibition of human aldose reductase (ALR2) evolved as a promising therapeutic concept to prevent late complications of diabetes. As well as appropriate affinity and bioavailability, putative inhibitors should possess a high level of selectivity for ...

    Inhibition of human aldose reductase (ALR2) evolved as a promising therapeutic concept to prevent late complications of diabetes. As well as appropriate affinity and bioavailability, putative inhibitors should possess a high level of selectivity for ALR2 over the related aldehyde reductase (ALR1). We investigated the selectivity-determining features by gradually mapping the residues deviating between the binding pockets of ALR1 and ALR2 into the ALR2 binding pocket. The resulting mutational constructs of ALR2 (eight point mutations and one double mutant) were probed for their influence towards ligand selectivity by X-ray structure analysis of the corresponding complexes and isothermal titration calorimetry (ITC). The binding properties of these mutants were evaluated using a ligand set of zopolrestat, a related uracil derivative, IDD388, IDD393, sorbinil, fidarestat and tolrestat. Our study revealed induced-fit adaptations within the mutated binding site as an essential prerequisite for ligand accommodation related to the selectivity discrimination of the ligands. However, our study also highlights the limits of the present understanding of protein-ligand interactions. Interestingly, binding site mutations not involved in any direct interaction to the ligands in various cases show significant effects towards their binding thermodynamics. Furthermore, our results suggest the binding site residues deviating between ALR1 and ALR2 influence ligand affinity in a complex interplay, presumably involving changes of dynamic properties and differences of the solvation/desolvation balance upon ligand binding.


    Organizational Affiliation

    Department of Pharmaceutical Chemistry, Philipps-University Marburg, Marbacher Weg 6, 35032 Marburg, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aldose reductase
A
316Homo sapiensMutation(s): 1 
Gene Names: ALR2AKR1B1ALDR1
EC: 1.1.1.21 (PDB Primary Data), 1.1.1.300 (UniProt), 1.1.1.372 (UniProt), 1.1.1.54 (UniProt)
Find proteins for P15121 (Homo sapiens)
Go to UniProtKB:  P15121
NIH Common Fund Data Resources
PHAROS  P15121
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP

Download CCD File 
A
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
393
Query on 393

Download CCD File 
A
(5-CHLORO-2-{[(3-NITROBENZYL)AMINO]CARBONYL}PHENOXY)ACETIC ACID
C16 H13 Cl N2 O6
VABIMMIJVWNHFI-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
393ΔG:  42.20000076293945   kJ/mol  BindingDB
393-TΔS:  13.890000343322754   kJ/mol  BindingDB
393Kd:  14   nM  BindingDB
393ΔG:  37.900001525878906   kJ/mol  BindingDB
393-TΔS:  36.88999938964844   kJ/mol  BindingDB
393ΔH:  54   kJ/mol  BindingDB
393ΔG:  41.5   kJ/mol  BindingDB
393IC50:  6   nM  BindingDB
393ΔG:  34.5   kJ/mol  BindingDB
393Kd:  256.3999938964844   nM  Binding MOAD
393-TΔS:  12.489999771118164   kJ/mol  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.164 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.46α = 76.08
b = 47.14β = 76.26
c = 47.22γ = 67.64
Software Package:
Software NamePurpose
SHELXmodel building
SHELXL-97refinement
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-04-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance