Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 64550.45 
• Atom Count: 4419 
• Residue Count: 532 
• Unique protein chains: 1

4FGZ

Crystal Structure of Phosphoethanolamine Methyltransferase from Plasmodium falciparum in Complex with Amodiaquine

• DOI: 10.2210/pdb4FGZ/pdb

• Classification: TRANSFERASE
• Organism(s): Plasmodium falciparum
• Expression System: Escherichia coli


• Deposited: 2012-06-05 Released: 2012-07-25 
• Deposition Author(s): Lee, S.G., Alpert, T.D., Jez, J.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.994 Å
• R-Value Free: 0.227 
• R-Value Work: 0.181 

Literature

Crystal structure of phosphoethanolamine methyltransferase from Plasmodium falciparum in complex with amodiaquine.

Lee, S.G., Alpert, T.D., Jez, J.M.

(2012) Bioorg.Med.Chem.Lett. 22: 4990-4993

• PubMed: 22771008 
• DOI: 10.1016/j.bmcl.2012.06.032


• PubMed Abstract: 
  

Phosphoethanolamine N-methyltransferase (PMT) is essential for phospholipid biogenesis in the malarial parasite Plasmodium falciparum. PfPMT catalyzes the triple methylation of phosphoethanolamine to produce phosphocholine, which is then used for phosphatidylcholine synthesis. Here we describe the 2.0Å resolution X-ray crystal structure of PfPMT in complex with amodiaquine. To better characterize inhibition of PfPMT by amodiaquine, we determined the IC(50) values of a series of aminoquinolines using a direct radiochemical assay. Both structural and functional analyses provide a possible approach for the development of new small molecule inhibitors of PfPMT.

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Organizational Affiliation: 

Department of Biology, Washington University, St. Louis, MO 63130, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Phosphoethanolamine N-methyltransferase	A, B	266	Plasmodium falciparum	Mutation(s): 0  Gene Names: PMT
Find proteins for Q6T755 (Plasmodium falciparum) Go to UniProtKB:  Q6T755

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
PO4	A, B	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
SAH	A, B	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N
CQA	A, B	4-[(7-CHLOROQUINOLIN-4-YL)AMINO]-2-[(DIETHYLAMINO)METHYL]PHENOL AMODIAQUINE, FLAVOQUINE C20 H22 Cl N3 O OVCDSSHSILBFBN-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
CQA	IC50: 1350000 nM (100) BINDINGDB
CQA	IC50: 1350000 nM BINDINGMOAD
CQA	IC50: 1350000 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.994 Å
• R-Value Free: 0.227 
• R-Value Work: 0.181 
• Space Group: P 1 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 66.051	α = 90.00
b = 60.639	β = 90.01
c = 68.151	γ = 90.00

Software Package:

Software Name	Purpose
HKL-3000	data collection
PHENIX	refinement
PHASER	phasing
HKL-3000	data reduction
HKL-3000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-06-05 
• Released Date: 2012-07-25 
• Deposition Author(s): Lee, S.G., Alpert, T.D., Jez, J.M.

Revision History 

• Version 1.0: 2012-07-25
  Type: Initial release
• Version 1.1: 2012-08-01
  Type: Database references