Complex of TcAChE with galanthamine derivative

Experimental Data Snapshot

  • Resolution: 2.05 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

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This is version 1.5 of the entry. See complete history


The complex of a bivalent derivative of galanthamine with torpedo acetylcholinesterase displays drastic deformation of the active-site gorge: implications for structure-based drug design.

Greenblatt, H.M.Guillou, C.Guenard, D.Argaman, A.Botti, S.Badet, B.Thal, C.Silman, I.Sussman, J.L.

(2004) J Am Chem Soc 126: 15405-15411

  • DOI: https://doi.org/10.1021/ja0466154
  • Primary Citation of Related Structures:  
    1W4L, 1W6R, 1W75, 1W76

  • PubMed Abstract: 

    Bifunctional derivatives of the alkaloid galanthamine, designed to interact with both the active site of the enzyme acetylcholinesterase (AChE) and its peripheral cation binding site, have been assayed with Torpedo californica AChE (TcAChE), and the three-dimensional structures of their complexes with the enzyme have been solved by X-ray crystallography. Differences were noted between the IC(50) values obtained for TcAChE and those for Electrophorus electricus AChE. These differences are ascribed to sequence differences in one or two residues lining the active-site gorge of the enzyme. The binding of one of the inhibitors disrupts the native conformation of one wall of the gorge, formed by the loop Trp279-Phe290. It is proposed that flexibility of this loop may permit the binding of inhibitors such as galanthamine, which are too bulky to penetrate the narrow neck of the gorge formed by Tyr121 and Phe330 as seen in the crystal structure.

  • Organizational Affiliation

    Departments of Structural Biology and Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ACETYLCHOLINESTERASE543Tetronarce californicaMutation(s): 0 
Find proteins for P04058 (Tetronarce californica)
Explore P04058 
Go to UniProtKB:  P04058
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04058
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
GNT BindingDB:  1W6R Ki: 190 (nM) from 1 assay(s)
IC50: min: 360, max: 1069 (nM) from 6 assay(s)
Binding MOAD:  1W6R IC50: 702 (nM) from 1 assay(s)
PDBBind:  1W6R IC50: 702 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.05 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 111.751α = 90
b = 111.751β = 90
c = 137.173γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-25
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-04-10
    Changes: Data collection, Database references, Derived calculations, Other
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Other, Structure summary