6TJ7

T. gondii myosin A trimeric complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural role of essential light chains in the apicomplexan glideosome.

Pazicky, S.Dhamotharan, K.Kaszuba, K.Mertens, H.D.T.Gilberger, T.Svergun, D.Kosinski, J.Weininger, U.Low, C.

(2020) Commun Biol 3: 568-568

  • DOI: https://doi.org/10.1038/s42003-020-01283-8
  • Primary Citation of Related Structures:  
    6TJ3, 6TJ4, 6TJ5, 6TJ6, 6TJ7, 6ZN3

  • PubMed Abstract: 

    Gliding, a type of motility based on an actin-myosin motor, is specific to apicomplexan parasites. Myosin A binds two light chains which further interact with glideosome associated proteins and assemble into the glideosome. The role of individual glideosome proteins is unclear due to the lack of structures of larger glideosome assemblies. Here, we investigate the role of essential light chains (ELCs) in Toxoplasma gondii and Plasmodium falciparum and present their crystal structures as part of trimeric sub-complexes. We show that although ELCs bind a conserved MyoA sequence, P. falciparum ELC adopts a distinct structure in the free and MyoA-bound state. We suggest that ELCs enhance MyoA performance by inducing secondary structure in MyoA and thus stiffen its lever arm. Structural and biophysical analysis reveals that calcium binding has no influence on the structure of ELCs. Our work represents a further step towards understanding the mechanism of gliding in Apicomplexa.


  • Organizational Affiliation

    Centre for Structural Systems Biology (CSSB), Notkestrasse 85, D-22607, Hamburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calmodulin, putative135Toxoplasma gondiiMutation(s): 0 
Gene Names: TGVEG_305050
UniProt
Find proteins for B9PZ33 (Toxoplasma gondii (strain ATCC 50861 / VEG))
Explore B9PZ33 
Go to UniProtKB:  B9PZ33
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB9PZ33
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Myosin light chain TgMLC1152Toxoplasma gondiiMutation(s): 0 
UniProt
Find proteins for Q95UJ7 (Toxoplasma gondii)
Explore Q95UJ7 
Go to UniProtKB:  Q95UJ7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ95UJ7
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Myosin-A42Toxoplasma gondiiMutation(s): 0 
UniProt
Find proteins for O00934 (Toxoplasma gondii)
Explore O00934 
Go to UniProtKB:  O00934
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO00934
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4

Download Ideal Coordinates CCD File 
I [auth C]TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
HEZ
Query on HEZ

Download Ideal Coordinates CCD File 
F [auth A]HEXANE-1,6-DIOL
C6 H14 O2
XXMIOPMDWAUFGU-UHFFFAOYSA-N
PDO
Query on PDO

Download Ideal Coordinates CCD File 
E [auth A],
G [auth A]
1,3-PROPANDIOL
C3 H8 O2
YPFDHNVEDLHUCE-UHFFFAOYSA-N
CA (Subject of Investigation/LOI)
Query on CA

Download Ideal Coordinates CCD File 
D [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
H [auth B]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.188 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.63α = 90
b = 93.482β = 90
c = 108.148γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other privateGermany800026
Swedish Research CouncilSweden621-2013-5905

Revision History  (Full details and data files)

  • Version 1.0: 2020-10-21
    Type: Initial release
  • Version 1.1: 2020-10-28
    Changes: Database references
  • Version 1.2: 2024-01-24
    Changes: Data collection, Database references, Refinement description