6NEA

Human Acetylcholinesterase in complex with reactivator, HLo7

• PDB DOI: https://doi.org/10.2210/pdb6NEA/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2018-12-17 Released: 2019-06-12 
• Deposition Author(s): Bester, S.M., McGuire, J., Height, J.J., Pegan, S.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.42 Å
• R-Value Free: 0.205 
• R-Value Work: 0.176 
• R-Value Observed: 0.177 

Literature

Synthesis and Molecular Properties of Nerve Agent Reactivator HLo-7 Dimethanesulfonate.

Hsu, F.L., Bae, S.Y., McGuire, J., Anderson, D.R., Bester, S.M., Height, J.J., Pegan, S.D., Walz, A.J.

(2019) ACS Med Chem Lett 10: 761-766

• PubMed: 31097996 
• DOI: https://doi.org/10.1021/acsmedchemlett.9b00021
• Primary Citation of Related Structures:  
  6NEA


• PubMed Abstract: 
  

  The threat of a deliberate release of chemical nerve agents has underscored the need to continually improve field effective treatments for these types of poisonings. The oxime containing HLö-7 is a potential second-generation therapeutic reactivator. A synthetic process for HLö-7 is detailed with improvements to the DIBAL reduction and ion exchange steps. HLö-7 was visualized for the first time within the active site of human acetylcholinesterase and its relative ex vivo potency confirmed against various nerve agents using a phrenic nerve hemidiaphragm assay.

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Organizational Affiliation: 

United States Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010, United States.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 121.75 kDa 
• Atom Count: 9,103 
• Modelled Residue Count: 1,061 
• Deposited Residue Count: 1,084 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Acetylcholinesterase	A, B	542	Homo sapiens	Mutation(s): 0  Gene Names: ACHE EC: 3.1.1.7
UniProt & NIH Common Fund Data Resources
Find proteins for P22303 (Homo sapiens) Explore P22303  Go to UniProtKB:  P22303
PHAROS:  P22303 GTEx:  ENSG00000087085

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Length	2D Diagram	Glycosylation	3D 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
Glycosylation Resources
GlyTouCan:  G21290RB GlyCosmos:  G21290RB GlyGen:  G21290RB

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HLO	F [auth A], K [auth B]	1-[({2,4-BIS[(E)-(HYDROXYIMINO)METHYL]PYRIDINIUM-1-YL}METHOXY)METHYL]-4-CARBAMOYLPYRIDINIUM C15 H17 N5 O4 SODKCPHRJDOHMI-UHFFFAOYSA-P
NAG	E [auth A], H [auth A], I [auth A], J [auth B]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
FUC	G [auth A]	alpha-L-fucopyranose C6 H12 O5 SHZGCJCMOBCMKK-SXUWKVJYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.42 Å
• R-Value Free: 0.205 
• R-Value Work: 0.176 
• R-Value Observed: 0.177 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 104.73	α = 90
b = 104.73	β = 90
c = 324.247	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-06-12 
Deposition Author(s): Bester, S.M., McGuire, J., Height, J.J., Pegan, S.D.

Revision History  

• Version 1.0: 2019-06-12
  Type: Initial release
  
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary
• Version 2.1: 2023-10-11
  Changes: Data collection, Database references, Derived calculations, Refinement description, Structure summary