4B81

Mus musculus Acetylcholinesterase in complex with 1-(4-Chloro-phenyl)- N-(2-diethylamino-ethyl)-methanesulfonamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Divergent Structure-Activity Relationships of Structurally Similar Acetylcholinesterase Inhibitors.

Andersson, C.D.Forsgren, N.Akfur, C.Allgardsson, A.Berg, L.Engdahl, C.Qian, W.Ekstrom, F.J.Linusson, A.

(2013) J.Med.Chem. 56: 7615

  • DOI: 10.1021/jm400990p
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The molecular interactions between the enzyme acetylcholinesterase (AChE) and two compound classes consisting of N-[2-(diethylamino)ethyl]benzenesulfonamides and N-[2-(diethylamino)ethyl]benzenemethanesulfonamides have been investigated using organic ...

    The molecular interactions between the enzyme acetylcholinesterase (AChE) and two compound classes consisting of N-[2-(diethylamino)ethyl]benzenesulfonamides and N-[2-(diethylamino)ethyl]benzenemethanesulfonamides have been investigated using organic synthesis, enzymatic assays, X-ray crystallography, and thermodynamic profiling. The inhibitors' aromatic properties were varied to establish structure-activity relationships (SAR) between the inhibitors and the peripheral anionic site (PAS) of AChE. The two structurally similar compound classes proved to have distinctly divergent SARs in terms of their inhibition capacity of AChE. Eight X-ray structures revealed that the two sets have different conformations in PAS. Furthermore, thermodynamic profiles of the binding between compounds and AChE revealed class-dependent differences of the entropy/enthalpy contributions to the free energy of binding. Further development of the entropy-favored compound class resulted in the synthesis of the most potent inhibitor and an extension beyond the established SARs. The divergent SARs will be utilized to develop reversible inhibitors of AChE into reactivators of nerve agent-inhibited AChE.


    Organizational Affiliation

    Department of Chemistry, Umeå University , SE-901 87 Umeå, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINESTERASE
A, B
548Mus musculusMutation(s): 0 
Gene Names: Ache
EC: 3.1.1.7
Find proteins for P21836 (Mus musculus)
Go to UniProtKB:  P21836
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
P6G
Query on P6G

Download SDF File 
Download CCD File 
B
HEXAETHYLENE GLYCOL
POLYETHYLENE GLYCOL PEG400
C12 H26 O7
IIRDTKBZINWQAW-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A, B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
ZN4
Query on ZN4

Download SDF File 
Download CCD File 
A, B
1-(4-chlorophenyl)-N-[2-(diethylamino)ethyl]methanesulfonamide
C13 H21 Cl N2 O2 S
MKQJIDUAXALKCV-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ZN4Kd: 11100 nM (99) BINDINGDB
ZN4IC50: 12000 nM (99) BINDINGDB
ZN4IC50: 12000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 77.959α = 90.00
b = 109.876β = 90.00
c = 227.926γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
XDSdata reduction
PHENIXrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-04
    Type: Initial release
  • Version 1.1: 2013-09-11
    Type: Database references
  • Version 1.2: 2013-10-30
    Type: Database references
  • Version 2.0: 2018-01-17
    Type: Atomic model, Data collection