Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 3  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 150.35 kDa 
• Atom Count: 11497 
• Modelled Residue Count: 1281 
• Deposited Residue Count: 1299 
• Unique protein chains: 1

4KRI

Haemonchus contortus Phospholethanolamine N-methyltransferase 2 in complex with phosphomonomethylethanolamine and S-adenosylhomocysteine

• PDB DOI: 10.2210/pdb4KRI/pdb

• Classification: TRANSFERASE
• Organism(s): Haemonchus contortus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2013-05-16 Released: 2013-09-25 
• Deposition Author(s): Lee, S.G., Jez, J.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.72 Å
• R-Value Free: 0.210 
• R-Value Work: 0.174 
• R-Value Observed: 0.176 

Literature

Evolution of structure and mechanistic divergence in di-domain methyltransferases from nematode phosphocholine biosynthesis.

Lee, S.G., Jez, J.M.

(2013) Structure 21: 1778-1787

• PubMed: 24012478 
• DOI: 10.1016/j.str.2013.07.023
• Primary Citation of Related Structures:  
  4KRG, 4KRH, 4KRI


• PubMed Abstract: 
  

The phosphobase methylation pathway is the major route for supplying phosphocholine to phospholipid biosynthesis in plants, nematodes, and Plasmodium. In this pathway, phosphoethanolamine N-methyltransferase (PMT) catalyzes the sequential methylation of phosphoethanolamine to phosphocholine. In the PMT, one domain (MT1) catalyzes methylation of phosphoethanolamine to phosphomonomethylethanolamine and a second domain (MT2) completes the synthesis of phosphocholine. The X-ray crystal structures of the di-domain PMT from the parasitic nematode Haemonchus contortus (HcPMT1 and HcPMT2) reveal that the catalytic domains of these proteins are structurally distinct and allow for selective methylation of phosphobase substrates using different active site architectures. These structures also reveal changes leading to loss of function in the vestigial domains of the nematode PMT. Divergence of function in the two nematode PMTs provides two distinct antiparasitic inhibitor targets within the same essential metabolic pathway. The PMTs from nematodes, plants, and Plasmodium also highlight adaptable metabolic modularity in evolutionarily diverse organisms.

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Organizational Affiliation: 

Department of Biology, Washington University in St. Louis, One Brookings Drive, Campus Box 1137, St. Louis, MO 63130, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phospholethanolamine N-methyltransferase 2	A, B, C	433	Haemonchus contortus	Mutation(s): 0
UniProt
Find proteins for U5HK48 (Haemonchus contortus) Explore U5HK48  Go to UniProtKB:  U5HK48

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SAH	D [auth A], F [auth B], H [auth C]	S-ADENOSYL-L-HOMOCYSTEINE C14 H20 N6 O5 S ZJUKTBDSGOFHSH-WFMPWKQPSA-N
1SH	E [auth A], G [auth B], I [auth C]	2-(methylamino)ethyl dihydrogen phosphate C3 H10 N O4 P HZDCAHRLLXEQFY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.72 Å
• R-Value Free: 0.210 
• R-Value Work: 0.174 
• R-Value Observed: 0.176 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 135.987	α = 90
b = 136.838	β = 118.39
c = 90.867	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-05-16 
• Released Date: 2013-09-25 
Deposition Author(s): Lee, S.G., Jez, J.M.

Revision History  

• Version 1.0: 2013-09-25
  Type: Initial release
  
• Version 1.1: 2013-10-30
  Changes: Database references