Crystal structure of the C-terminal catalytic domain of Plasmodium falciparum CTP:phosphocholine cytidylyltransferase in complex with CMP

Experimental Data Snapshot

  • Resolution: 1.98 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

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Structural determinants of the catalytic mechanism of Plasmodium CCT, a key enzyme of malaria lipid biosynthesis.

Guca, E.Nagy, G.N.Hajdu, F.Marton, L.Izrael, R.Hoh, F.Yang, Y.Vial, H.Vertessy, B.G.Guichou, J.F.Cerdan, R.

(2018) Sci Rep 8: 11215-11215

  • DOI: https://doi.org/10.1038/s41598-018-29500-9
  • Primary Citation of Related Structures:  
    4ZCP, 4ZCQ, 4ZCR, 4ZCS, 4ZCT

  • PubMed Abstract: 

    The development of the malaria parasite, Plasmodium falciparum, in the human erythrocyte, relies on phospholipid metabolism to fulfil the massive need for membrane biogenesis. Phosphatidylcholine (PC) is the most abundant phospholipid in Plasmodium membranes. PC biosynthesis is mainly ensured by the de novo Kennedy pathway that is considered as an antimalarial drug target. The CTP:phosphocholine cytidylyltransferase (CCT) catalyses the rate-limiting step of the Kennedy pathway. Here we report a series of structural snapshots of the PfCCT catalytic domain in its free, substrate- and product-complexed states that demonstrate the conformational changes during the catalytic mechanism. Structural data show the ligand-dependent conformational variations of a flexible lysine. Combined kinetic and ligand-binding analyses confirm the catalytic roles of this lysine and of two threonine residues of the helix αE. Finally, we assessed the variations in active site residues between Plasmodium and mammalian CCT which could be exploited for future antimalarial drug design.

  • Organizational Affiliation

    Dynamique des Interactions Membranaires Normales et Pathologiques, UMR 5235, CNRS, Université de Montpellier, Montpellier, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Cholinephosphate cytidylyltransferase180Plasmodium falciparumMutation(s): 0 
Gene Names: ctPMAL13P1.86
Find proteins for Q8IEE9 (Plasmodium falciparum (isolate 3D7))
Explore Q8IEE9 
Go to UniProtKB:  Q8IEE9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8IEE9
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on C5P

Download Ideal Coordinates CCD File 
C9 H14 N3 O8 P
Experimental Data & Validation

Experimental Data

  • Resolution: 1.98 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.52α = 90
b = 69.3β = 90
c = 116.44γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
Cootmodel building
XDSdata reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
EU-ITN Marie Curie ParametFrance290080

Revision History  (Full details and data files)

  • Version 1.0: 2016-09-14
    Type: Initial release
  • Version 1.1: 2018-08-29
    Changes: Data collection, Database references
  • Version 1.2: 2024-01-10
    Changes: Data collection, Database references, Refinement description