7BO4

Human Butyrylcholinesterase in complex with 3-(2-(butyl(2-cycloheptylethyl)amino)ethyl)-1H-indol-6-ol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.186 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

From tryptophan-based amides to tertiary amines: Optimization of a butyrylcholinesterase inhibitor series.

Meden, A.Knez, D.Brazzolotto, X.Nachon, F.Dias, J.Svete, J.Stojan, J.Groselj, U.Gobec, S.

(2022) Eur J Med Chem 234: 114248-114248

  • DOI: https://doi.org/10.1016/j.ejmech.2022.114248
  • Primary Citation of Related Structures:  
    7BO3, 7BO4

  • PubMed Abstract: 

    Lead optimization of a series of tryptophan-based nanomolar butyrylcholinesterase (BChE) inhibitors led to tertiary amines as highly potent, achiral, sp 3 -rich analogues with better synthetic accessibility and high selectivity over acetylcholinesterase (one to ten thousandfold). Taking it one step further, the introduction of a carbamate warhead on the well-explored reversible scaffold allowed conversion to pseudoirreversible inhibitors that bound covalently to BChE and prolonged the duration of inhibition (half-life of 14.8 h for compound 45a-carbamoylated enzyme). Additionally, N-hydroxyindole was discovered as a novel leaving group chemotype. The covalent mechanism of action was confirmed by time-dependency experiments, progress curve analysis, and indirectly by co-crystallization with the human recombinant enzyme. Two crystal structures of BChE-inhibitor complexes were solved and coupled with the supporting molecular dynamics simulations increased our understanding of the structure-activity relationship, while also providing the necessary structural information for future optimization of this series. Overall, this research demonstates the high versatility and potential of this series of BChE inhibitors.


  • Organizational Affiliation

    University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, SI-1000, Ljubljana, Slovenia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cholinesterase529Homo sapiensMutation(s): 4 
Gene Names: BCHECHE1
EC: 3.1.1.8
UniProt & NIH Common Fund Data Resources
Find proteins for P06276 (Homo sapiens)
Explore P06276 
Go to UniProtKB:  P06276
PHAROS:  P06276
GTEx:  ENSG00000114200 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06276
Glycosylation
Glycosylation Sites: 6Go to GlyGen: P06276-1
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose
B, E
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G86851RC
GlyCosmos:  G86851RC
GlyGen:  G86851RC
Entity ID: 3
MoleculeChains 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, F
3N-Glycosylation
Glycosylation Resources
GlyTouCan:  G21290RB
GlyCosmos:  G21290RB
GlyGen:  G21290RB
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
A87 (Subject of Investigation/LOI)
Query on A87

Download Ideal Coordinates CCD File 
J [auth A]3-[2-[butyl(2-cycloheptylethyl)amino]ethyl]-1~{H}-indol-6-ol
C23 H36 N2 O
KRICXPIAKQTZMM-UHFFFAOYSA-N
SIA
Query on SIA

Download Ideal Coordinates CCD File 
K [auth A]N-acetyl-alpha-neuraminic acid
C11 H19 N O9
SQVRNKJHWKZAKO-YRMXFSIDSA-N
NAG
Query on NAG

Download Ideal Coordinates CCD File 
G [auth A]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
MES
Query on MES

Download Ideal Coordinates CCD File 
H [auth A]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
L [auth A],
M [auth A],
N [auth A],
O [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
MOH
Query on MOH

Download Ideal Coordinates CCD File 
I [auth A]METHANOL
C H4 O
OKKJLVBELUTLKV-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
A87 BindingDB:  7BO4 Ki: min: 62, max: 252 (nM) from 2 assay(s)
IC50: 30 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.186 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 155.3α = 90
b = 155.3β = 90
c = 128.06γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
XDSdata reduction
PHASERphasing
XSCALEdata scaling
PHENIXrefinement
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
French Ministry of Armed ForcesFranceNBC-5-C-4210

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-02
    Type: Initial release
  • Version 1.1: 2022-03-16
    Changes: Database references
  • Version 1.2: 2022-03-30
    Changes: Database references
  • Version 1.3: 2024-01-31
    Changes: Data collection, Refinement description