1VOT

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


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.Mol.Biol. 4: 57-63

  • Primary Citation of Related Structures:  
  • Also Cited By: 1H23, 1H22, 1ZGB

  • 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 comp ...

    (-)-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.,Sect.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: 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
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HUP
Query on HUP
Download SDF File 
Download CCD File 
A
Huperzine A
C15 H18 N2 O
ZRJBHWIHUMBLCN-YQEJDHNASA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
HUPIC50: 11.4 nM (100) BINDINGDB
HUPKi: 250 nM BINDINGMOAD
HUPKi: 250 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 112.632α = 90.00
b = 112.632β = 90.00
c = 136.378γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORphasing
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

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