1VOT

ACETYLCHOLINESTERASE (E.C. 3.1.1.7) COMPLEXED WITH HUPERZINE A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structure of acetylcholinesterase complexed with the nootropic alkaloid, (-)-huperzine A.

Raves, M.L.Harel, M.Pang, Y.P.Silman, I.Kozikowski, A.P.Sussman, J.L.

(1997) Nat Struct Biol 4: 57-63

  • DOI: 10.1038/nsb0197-57
  • Primary Citation of Related Structures:  
    1VOT, 2ACE

  • PubMed Abstract: 
  • (-)-Huperzine A (HupA) is found in an extract from a club moss that has been used for centuries in Chinese folk medicine. Its action has been attributed to its ability to strongly inhibit acetylcholinesterase (AChE). The crystal structure of the complex of AChE with optically pure HupA at 2 ...

    (-)-Huperzine A (HupA) is found in an extract from a club moss that has been used for centuries in Chinese folk medicine. Its action has been attributed to its ability to strongly inhibit acetylcholinesterase (AChE). The crystal structure of the complex of AChE with optically pure HupA at 2.5 A resolution shows an unexpected orientation for the inhibitor with surprisingly few strong direct interactions with protein residues to explain its high affinity. This structure is compared to the native structure of AChE devoid of any inhibitor as determined to the same resolution. An analysis of the affinities of structural analogues of HupA, correlated with their interactions with the protein, shows the importance of individual hydrophobic interactions between HupA and aromatic residues in the active-site gorge of AChE.


    Related Citations: 
    • Mechanism of Inhibition of Cholinesterases by Huperzine A
      Ashani, Y., Peggins III, J.O., Doctor, B.P.
      (1992) Biochem Biophys Res Commun 184: 719
    • Huperzine A--A Potent Acetylcholinesterase Inhibitor of Use in the Treatment of Alzheimer'S Disease
      Geib, S.J., Tuckmantel, W., Kozikowski, A.P.
      (1991) Acta Crystallogr C 47: 824
    • 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

    Organizational Affiliation

    Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACETYLCHOLINESTERASEA537Tetronarce californicaMutation(s): 0 
Gene Names: ache
EC: 3.1.1.7
UniProt
Find proteins for P04058 (Tetronarce californica)
Explore P04058 
Go to UniProtKB:  P04058
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HUP (Subject of Investigation/LOI)
Query on HUP

Download Ideal Coordinates CCD File 
B [auth A]Huperzine A
C15 H18 N2 O
ZRJBHWIHUMBLCN-YQEJDHNASA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
HUP PDBBind:  1VOT Ki: 250 (nM) from 1 assay(s)
Binding MOAD:  1VOT Ki: 250 (nM) from 1 assay(s)
BindingDB:  1VOT IC50: 11.4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.205 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.632α = 90
b = 112.632β = 90
c = 136.378γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-06-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2013-10-23
    Changes: Non-polymer description