Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 60.90 kDa 
• Atom Count: 4308 
• Residue Count: 527 
• Unique protein chains: 1

1AX9

ACETYLCHOLINESTERASE COMPLEXED WITH EDROPHONIUM, LAUE DATA

• DOI: 10.2210/pdb1AX9/pdb

• Classification: HYDROLASE
• Organism(s): Tetronarce californica
• Mutation(s): No 


• Deposited: 1997-11-03 Released: 1998-02-11 
• Deposition Author(s): Raves, M.L., Ravelli, R.B.G., Sussman, J.L., Harel, M., Silman, I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.268 
• R-Value Observed: 0.207 

Literature

Static Laue diffraction studies on acetylcholinesterase.

Ravelli, R.B., Raves, M.L., Ren, Z., Bourgeois, D., Roth, M., Kroon, J., Silman, I., Sussman, J.L.

(1998) Acta Crystallogr D Biol Crystallogr 54: 1359-1366

• PubMed: 10089512 
• DOI: 10.1107/s0907444998005277
• Primary Citation of Related Structures:  
  2ACK, 1AX9


• PubMed Abstract: 
  

Acetylcholinesterase (AChE) is one of nature's fastest enzymes, despite the fact that its three-dimensional structure reveals its active site to be deeply sequestered within the molecule. This raises questions with respect to traffic of substrate to, and products from, the active site, which may be investigated by time-resolved crystallography. In order to address one aspect of the feasibility of performing time-resolved studies on AChE, a data set has been collected using the Laue technique on a trigonal crystal of Torpedo californica AChE soaked with the reversible inhibitor edrophonium, using a total X-ray exposure time of 24 ms. Electron-density maps obtained from the Laue data, which are of surprisingly good quality compared with similar maps from monochromatic data, show essentially the same features. They clearly reveal the bound ligand, as well as a structural change in the conformation of the active-site Ser200 induced upon binding.

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Related Citations: 

• Quaternary Ligand Binding to Aromatic Residues in the Active-Site Gorge of Acetylcholinesterase
  Harel, M., Schalk, I., Ehret-Sabatier, L., Bouet, F., Goeldner, M., Hirth, C., Axelsen, P.H., Silman, I., Sussman, J.L.
  (1993) Proc Natl Acad Sci U S A 90: 9031

• Atomic Structure of Acetylcholinesterase from Torpedo Californica: A Prototypic Acetylcholine-Binding Protein
  Sussman, J.L., Harel, M., Frolow, F., Oefner, C., Goldman, A., Toker, L., Silman, I.
  (1991) Science 253: 872

• Purification and Crystallization of a Dimeric Form of Acetylcholinesterase from Torpedo Californica Subsequent to Solubilization with Phosphatidylinositol-Specific Phospholipase C
  Sussman, J.L., Harel, M., Frolow, F., Varon, L., Toker, L., Futerman, A.H., Silman, I.
  (1988) J Mol Biol 203: 821

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Organizational Affiliation: 

Department of Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ACETYLCHOLINESTERASE	A	537	Tetronarce californica	Mutation(s): 0  Gene Names: ache EC: 3.1.1.7
Find proteins for P04058 (Tetronarce californica) Explore P04058  Go to UniProtKB:  P04058

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDR	A	EDROPHONIUM ION C10 H16 N O VWLHWLSRQJQWRG-UHFFFAOYSA-O

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.268 
• R-Value Observed: 0.207 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 113	α = 90
b = 113	β = 90
c = 136.9	γ = 120

Software Package:

Software Name	Purpose
LAUEVIEW	data collection
LAUEVIEW	data reduction
REFMAC	refinement
LAUEVIEW	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-11-03 
• Released Date: 1998-02-11 
Deposition Author(s): Raves, M.L., Ravelli, R.B.G., Sussman, J.L., Harel, M., Silman, I.

Revision History 

• Version 1.0: 1998-02-11
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance