2C5F

Torpedo californica acetylcholinesterase in complex with a non hydrolysable substrate analogue, 4-oxo-N,N,N-trimethylpentanaminium


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.163 

wwPDB Validation 3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Structural Insights Into Substrate Traffic and Inhibition in Acetylcholinesterase.

Colletier, J.P.Fournier, D.Greenblatt, H.M.Stojan, J.Sussman, J.L.Zaccai, G.Silman, I.Weik, M.

(2006) EMBO J 25: 2746

  • DOI: 10.1038/sj.emboj.7601175
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Acetylcholinesterase (AChE) terminates nerve-impulse transmission at cholinergic synapses by rapid hydrolysis of the neurotransmitter, acetylcholine. Substrate traffic in AChE involves at least two binding sites, the catalytic and peripheral anionic ...

    Acetylcholinesterase (AChE) terminates nerve-impulse transmission at cholinergic synapses by rapid hydrolysis of the neurotransmitter, acetylcholine. Substrate traffic in AChE involves at least two binding sites, the catalytic and peripheral anionic sites, which have been suggested to be allosterically related and involved in substrate inhibition. Here, we present the crystal structures of Torpedo californica AChE complexed with the substrate acetylthiocholine, the product thiocholine and a nonhydrolysable substrate analogue. These structures provide a series of static snapshots of the substrate en route to the active site and identify, for the first time, binding of substrate and product at both the peripheral and active sites. Furthermore, they provide structural insight into substrate inhibition in AChE at two different substrate concentrations. Our structural data indicate that substrate inhibition at moderate substrate concentration is due to choline exit being hindered by a substrate molecule bound at the peripheral site. At the higher concentration, substrate inhibition arises from prevention of exit of acetate due to binding of two substrate molecules within the active-site gorge.


    Organizational Affiliation

    Laboratoire de Biophysique Moléculaire, Institut de Biologie Structurale (CEA/CNRS/UJF), Grenoble Cedex, France.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACETYLCHOLINESTERASE
A
537Tetronarce californicaMutation(s): 0 
Gene Names: ache
EC: 3.1.1.7
Find proteins for P04058 (Tetronarce californica)
Go to UniProtKB:  P04058
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
NWA
Query on NWA

Download CCD File 
A
4,4-DIHYDROXY-N,N,N-TRIMETHYLPENTAN-1-AMINIUM
C8 H20 N O2
WEYSSHXEYINXQE-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download CCD File 
A
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
CHH
Query on CHH

Download CCD File 
A
N,N,N-TRIMETHYL-4-OXOPENTAN-1-AMINIUM
C8 H18 N O
UKCYTFTWLWVZSO-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CHHIC50:  8.5   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.163 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.26α = 90
b = 112.26β = 90
c = 137γ = 120
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2018-07-25
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2019-04-03
    Changes: Data collection, Derived calculations, Experimental preparation