6I7E

Plasmodium falciparum Myosin A, Pre-powerstroke


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.492 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Plasmodium myosin A drives parasite invasion by an atypical force generating mechanism.

Robert-Paganin, J.Robblee, J.P.Auguin, D.Blake, T.C.A.Bookwalter, C.S.Krementsova, E.B.Moussaoui, D.Previs, M.J.Jousset, G.Baum, J.Trybus, K.M.Houdusse, A.

(2019) Nat Commun 10: 3286-3286

  • DOI: 10.1038/s41467-019-11120-0
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Plasmodium parasites are obligate intracellular protozoa and causative agents of malaria, responsible for half a million deaths each year. The lifecycle progression of the parasite is reliant on cell motility, a process driven by myosin A, an unconve ...

    Plasmodium parasites are obligate intracellular protozoa and causative agents of malaria, responsible for half a million deaths each year. The lifecycle progression of the parasite is reliant on cell motility, a process driven by myosin A, an unconventional single-headed class XIV molecular motor. Here we demonstrate that myosin A from Plasmodium falciparum (PfMyoA) is critical for red blood cell invasion. Further, using a combination of X-ray crystallography, kinetics, and in vitro motility assays, we elucidate the non-canonical interactions that drive this motor's function. We show that PfMyoA motor properties are tuned by heavy chain phosphorylation (Ser19), with unphosphorylated PfMyoA exhibiting enhanced ensemble force generation at the expense of speed. Regulated phosphorylation may therefore optimize PfMyoA for enhanced force generation during parasite invasion or for fast motility during dissemination. The three PfMyoA crystallographic structures presented here provide a blueprint for discovery of specific inhibitors designed to prevent parasite infection.


    Organizational Affiliation

    Structural Motility, UMR 144 CNRS/Curie Institute, 26 rue d'ulm, 75258, Paris cedex 05, France.,Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), Université d'Orléans, INRA, USC1328, 45067, Orléans, France.,Structural Motility, UMR 144 CNRS/Curie Institute, 26 rue d'ulm, 75258, Paris cedex 05, France. anne.houdusse@curie.fr.,Department of Life Sciences, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, UK.,Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT, 05405, USA. kathleen.trybus@uvm.edu.,Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT, 05405, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myosin-A
A
768Plasmodium falciparum (isolate 3D7)Mutation(s): 0 
Find proteins for Q8IDR3 (Plasmodium falciparum (isolate 3D7))
Go to UniProtKB:  Q8IDR3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
VO4
Query on VO4

Download SDF File 
Download CCD File 
A
VANADATE ION
O4 V
LSGOVYNHVSXFFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.492 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.193 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 197.460α = 90.00
b = 197.460β = 90.00
c = 178.144γ = 120.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
PHASERphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Human Frontier Science ProgramUnited StatesRGY0066/2016
Wellcome TrustUnited Kingdom109007/Z/15/A
Wellcome TrustUnited Kingdom100993/Z/13/Z

Revision History 

  • Version 1.0: 2019-08-07
    Type: Initial release