1MAH | pdb_00001mah

FASCICULIN2-MOUSE ACETYLCHOLINESTERASE COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1MAH/pdb

• Classification: COMPLEX (HYDROLASE/TOXIN)
• Organism(s): Mus musculus, Dendroaspis angusticeps
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 1995-11-21 Released: 1996-04-03 
• Deposition Author(s): Bourne, Y., Taylor, P., Marchot, P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 
  0.294 (Depositor) 
• R-Value Work: 
  0.184 (Depositor) 
• R-Value Observed: 
  0.184 (Depositor) 

Literature

Acetylcholinesterase inhibition by fasciculin: crystal structure of the complex.

Bourne, Y., Taylor, P., Marchot, P.

(1995) Cell 83: 503-512

• PubMed: 8521480 
• DOI: https://doi.org/10.1016/0092-8674(95)90128-0
• Primary Citation Related Structures: 
  1MAH


• PubMed Abstract: 
  

  The crystal structure of the snake toxin fasciculin, bound to mouse acetylcholinesterase (mAChE), at 3.2 A resolution reveals a synergistic three-point anchorage consistent with the picomolar dissociation constant of the complex. Loop II of fasciculin contains a cluster of hydrophobic residues that interact with the peripheral anionic site of the enzyme and sterically occlude substrate access to the catalytic site. Loop I fits in a crevice near the lip of the gorge to maximize the surface area of contact of loop II at the gorge entry. The fasciculin core surrounds a protruding loop on the enzyme surface and stabilizes the whole assembly. Upon binding of fasciculin, subtle structural rearrangements of AChE occur that could explain the observed residual catalytic activity of the fasciculin-enzyme complex.

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Organizational Affiliation: 
• Department of Pharmacology, University of California, San Diego, La Jolla 92093-0636, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 66.75 kDa 
• Atom Count: 4,590 
• Modeled Residue Count: 594 
• Deposited Residue Count: 604 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ACETYLCHOLINESTERASE	A	543	Mus musculus	Mutation(s): 0  Gene Names: MOUSE ACHE EC: 3.1.1.7
UniProt & NIH Common Fund Data Resources
Find proteins for P21836 (Mus musculus) Explore P21836  Go to UniProtKB:  P21836
IMPC:  MGI:87876
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P21836-1

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
FASCICULIN 2	B [auth F]	61	Dendroaspis angusticeps	Mutation(s): 0
UniProt
Find proteins for P0C1Z0 (Dendroaspis angusticeps) Explore P0C1Z0  Go to UniProtKB:  P0C1Z0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	C [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free:  0.294 (Depositor) 
• R-Value Work:  0.184 (Depositor) 
• R-Value Observed: 0.184 (Depositor) 

Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.5	α = 90
b = 75.5	β = 90
c = 556.2	γ = 120

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-04-03 
Deposition Author(s): Bourne, Y., Taylor, P., Marchot, P.

Revision History  

• Version 1.0: 1996-04-03
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Database references, Derived calculations, Structure summary
• Version 1.4: 2021-03-31
  Changes: Source and taxonomy, Structure summary
• Version 1.5: 2024-10-23
  Changes: Data collection, Database references, Structure summary