6ARY

Crystal structure of an insecticide-resistant acetylcholinesterase mutant from the malaria vector Anopheles gambiae in complex with a difluoromethyl ketone inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.163 

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Literature

Structure of the G119S Mutant Acetylcholinesterase of the Malaria Vector Anopheles gambiae Reveals Basis of Insecticide Resistance.

Cheung, J.Mahmood, A.Kalathur, R.Liu, L.Carlier, P.R.

(2018) Structure 26: 130-136.e2

  • DOI: 10.1016/j.str.2017.11.021
  • Primary Citation of Related Structures:  
    6ARX, 6ARY

  • PubMed Abstract: 
  • Malaria is a devastating disease in sub-Saharan Africa and is transmitted by the mosquito Anopheles gambiae. While indoor residual spraying of anticholinesterase insecticides has been useful in controlling the spread of malaria, widespread application of these compounds has led to the rise of an insecticide-resistant mosquito strain that harbors a G119S mutation in the nervous system target enzyme acetylcholinesterase ...

    Malaria is a devastating disease in sub-Saharan Africa and is transmitted by the mosquito Anopheles gambiae. While indoor residual spraying of anticholinesterase insecticides has been useful in controlling the spread of malaria, widespread application of these compounds has led to the rise of an insecticide-resistant mosquito strain that harbors a G119S mutation in the nervous system target enzyme acetylcholinesterase. We demonstrate the atomic basis of insecticide resistance through structure determination of the G119S mutant acetylcholinesterase of An. gambiae in the ligand-free state and bound to a potent difluoromethyl ketone inhibitor. These structures reveal specific features within the active-site gorge distinct from human acetylcholinesterase, including an open channel at the base of the gorge, and provide a means for improving species selectivity in the rational design of improved insecticides for malaria vector control.


    Organizational Affiliation

    Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AcetylcholinesteraseA, B542Anopheles gambiaeMutation(s): 1 
Gene Names: AceACE1ACHE1AGAP001356
EC: 3.1.1.7
UniProt
Find proteins for Q869C3 (Anopheles gambiae)
Explore Q869C3 
Go to UniProtKB:  Q869C3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ869C3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
J [auth B]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
BT7
Query on BT7

Download Ideal Coordinates CCD File 
C [auth A],
I [auth B]
(1S)-2,2-difluoro-1-[1-(pentan-3-yl)-1H-pyrazol-4-yl]ethan-1-ol
C10 H16 F2 N2 O
LKTXIVWHOJXFEW-VIFPVBQESA-N
 Ligand Interaction
FLC
Query on FLC

Download Ideal Coordinates CCD File 
F [auth A],
G [auth A],
K [auth B],
L [auth B]
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
H [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.26 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.163 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 150.333α = 90
b = 150.333β = 90
c = 226.478γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data collection
HKL-2000data scaling
PDB_EXTRACTdata extraction
PHASERphasing
Cootmodel building
HKL-2000data reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-01-10
    Type: Initial release
  • Version 1.1: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary