3RJS

Crystal structure of Dynein Light Chain 8a (DLC8) from Toxoplasma gondii at 1.5 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Dynein light chain 8a of Toxoplasma gondii, a unique conoid-localized beta-strand-swapped homodimer, is required for an efficient parasite growth.

Qureshi, B.M.Hofmann, N.E.Arroyo-Olarte, R.D.Nickl, B.Hoehne, W.Jungblut, P.R.Lucius, R.Scheerer, P.Gupta, N.

(2013) Faseb J. 27: 1034-1047

  • DOI: 10.1096/fj.11-180992

  • PubMed Abstract: 
  • Dynein light chain 8 (DLC8) is a ubiquitous eukaryotic protein regulating diverse cellular functions. We show that the obligate intracellular parasite Toxoplasma gondii harbors 4 DLC8 proteins (TgDLC8a-d), of which only TgDLC8a clusters in the mainst ...

    Dynein light chain 8 (DLC8) is a ubiquitous eukaryotic protein regulating diverse cellular functions. We show that the obligate intracellular parasite Toxoplasma gondii harbors 4 DLC8 proteins (TgDLC8a-d), of which only TgDLC8a clusters in the mainstream LC8 class. TgDLC8b-d proteins form a divergent and alveolate-specific clade. TgDLC8b-d proteins are largely cytosolic, whereas TgDLC8a resides in the conoid at the apical end of T. gondii. The apical location of TgDLC8a is also not shared by its nearly identical Eimeria (EtDLC8a), Plasmodium (PfDLC8), or human (HsDLC8) orthologs. Notwithstanding an exclusive conoid targeting, TgDLC8a exhibits a classical LC8 structure. It forms a homodimer by swapping of the β strands that interact with the antiparallel β' strands of the opposing monomers. The TgDLC8a dimer contains two identical binding grooves and appears to be adapted for multitarget recognition. By contrast, the previously reported PfDLC8 homodimer is shaped by binding of the β strand with the parallel β' strand and lacks such a distinct binding interface. Our comparisons suggest an unexpected structural and functional divergence of the two otherwise conserved proteins from apicomplexan parasites. Finally, we demonstrate that a phosphomimetic S88E mutation renders the TgDLC8a-S88E mutant monomeric and cytosolic in T. gondii, and its overexpression inhibits the parasite growth in human fibroblasts.


    Organizational Affiliation

    Department of Molecular Parasitology, Humboldt University, Berlin, D-10115 Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dynein light chain motor protein
A
89Toxoplasma gondiiN/A
Find proteins for A1YTN0 (Toxoplasma gondii)
Go to UniProtKB:  A1YTN0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.193 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 75.025α = 90.00
b = 75.025β = 90.00
c = 85.081γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
HKL-2000data reduction
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-12
    Type: Initial release
  • Version 1.1: 2013-05-15
    Type: Database references