6ARX

Crystal structure of an insecticide-resistant acetylcholinesterase mutant from the malaria vector Anopheles gambiae in the ligand-free state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.302 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

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:  

  • 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 applicatio ...

    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

    New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA.,New York Structural Biology Center, 89 Convent Avenue, New York, NY 10027, USA. Electronic address: jcheung@nysbc.org.,Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acetylcholinesterase
A, B
542Anopheles gambiaeMutation(s): 1 
Gene Names: Ace (ACE1, ACHE1)
EC: 3.1.1.7
Find proteins for Q869C3 (Anopheles gambiae)
Go to UniProtKB:  Q869C3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
FLC
Query on FLC

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Download CCD File 
A, B
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.302 Å
  • R-Value Free: 0.203 
  • R-Value Work: 0.178 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 149.599α = 90.00
b = 149.599β = 90.00
c = 225.857γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXrefinement
Cootmodel building
PHASERphasing
HKL-2000data scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-10
    Type: Initial release