6WVC

Crystal Structure of Recombinant Human Acetylcholinesterase Inhibited by GD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.155 
  • R-Value Observed: 0.158 

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Literature

Structural and Biochemical Insights into the Inhibition of Human Acetylcholinesterase by G-Series Nerve Agents and Subsequent Reactivation by HI-6.

McGuire, J.R.Bester, S.M.Guelta, M.A.Cheung, J.Langley, C.Winemiller, M.D.Bae, S.Y.Funk, V.Myslinski, J.M.Pegan, S.D.Height, J.J.

(2021) Chem Res Toxicol 

  • DOI: 10.1021/acs.chemrestox.0c00406
  • Primary Citation of Related Structures:  
    6WV1, 6WVP, 6WVQ, 6WVC, 6WUV, 6WUY, 6WUZ

  • PubMed Abstract: 
  • The recent use of organophosphate nerve agents in Syria, Malaysia, Russia, and the United Kingdom has reinforced the potential threat of their intentional release. These agents act through their ability to inhibit human acetylcholinesterase (hAChE; E.C. ...

    The recent use of organophosphate nerve agents in Syria, Malaysia, Russia, and the United Kingdom has reinforced the potential threat of their intentional release. These agents act through their ability to inhibit human acetylcholinesterase (hAChE; E.C. 3.1.1.7), an enzyme vital for survival. The toxicity of hAChE inhibition via G-series nerve agents has been demonstrated to vary widely depending on the G-agent used. To gain insight into this issue, the structures of hAChE inhibited by tabun, sarin, cyclosarin, soman, and GP were obtained along with the inhibition kinetics for these agents. Through this information, the role of hAChE active site plasticity in agent selectivity is revealed. With reports indicating that the efficacy of reactivators can vary based on the nerve agent inhibiting hAChE, human recombinatorially expressed hAChE was utilized to define these variations for HI-6 among various G-agents. To identify the structural underpinnings of this phenomenon, the structures of tabun, sarin, and soman-inhibited hAChE in complex with HI-6 were determined. This revealed how the presence of G-agent adducts impacts reactivator access and placement within the active site. These insights will contribute toward a path of next-generation reactivators and an improved understanding of the innate issues with the current reactivators.


    Organizational Affiliation

    United States Army Futures Command, Combat Capabilities Development Command, Chemical Biological Center, Chemcial Sciences Division, Agent Chemistry Branch, Aberdeen Proving Ground, Aberdeen, Maryland 21010-5424, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Acetylcholinesterase AB542Homo sapiensMutation(s): 0 
Gene Names: ACHE
EC: 3.1.1.7
Find proteins for P22303 (Homo sapiens)
Explore P22303 
Go to UniProtKB:  P22303
NIH Common Fund Data Resources
PHAROS:  P22303
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
3 N-Glycosylation Oligosaccharides Interaction
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
7PE
Query on 7PE

Download Ideal Coordinates CCD File 
A
2-(2-(2-(2-(2-(2-ETHOXYETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHANOL
C14 H30 O7
UKXKPKBTMYNOFS-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download Ideal Coordinates CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
UCY
Query on UCY

Download Ideal Coordinates CCD File 
A, B
(1S)-2,2-dimethylcyclopentyl (R)-methylphosphinate
C8 H17 O2 P
GJIHMVVDUGLKHR-ZETCQYMHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.155 
  • R-Value Observed: 0.158 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.142α = 90
b = 105.142β = 90
c = 323.698γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Defense Threat Reduction Agency (DTRA)United StatesCB#3889

Revision History 

  • Version 1.0: 2021-02-17
    Type: Initial release