Crystal Structure of the N-terminal domain of Effector Protein LegC3 from Legionella pneumophila

Experimental Data Snapshot

  • Resolution: 2.08 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.213 

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This is version 1.3 of the entry. See complete history


Structure of the N-terminal domain of the effector protein LegC3 from Legionella pneumophila.

Yao, D.Cherney, M.Cygler, M.

(2014) Acta Crystallogr D Biol Crystallogr 70: 436-441

  • DOI: https://doi.org/10.1107/S139900471302991X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Legionella pneumophila secretes over 300 effectors during the invasion of human cells. The functions of only a small number of them have been identified. LegC3 is one of the identified effectors, which is believed to act by inhibiting vacuolar fusion. It contains two predicted transmembrane helices that divide the protein into a larger N-terminal domain and a smaller C-terminal domain. The function of LegC3 has been shown to be associated primarily with the N-terminal domain, which contains coiled-coil sequence motifs. The structure of the N-terminal domain has been determined and it is shown that it is highly α-helical and contains a helical bundle followed by a long antiparallel coiled-coil. No similar protein fold has been observed in the PDB. A long loop at the tip of the coiled-coil distal from the membrane is disordered and may be important for interaction with an as yet unidentified protein.

  • Organizational Affiliation

    Department of Biochemistry, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK S7N 5E5, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kinectin 1 (Kinesin receptor)367Legionella pneumophila subsp. pneumophila str. Philadelphia 1Mutation(s): 0 
Gene Names: legC3lpg1701
Find proteins for Q5ZUU1 (Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513))
Explore Q5ZUU1 
Go to UniProtKB:  Q5ZUU1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5ZUU1
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
Experimental Data & Validation

Experimental Data

  • Resolution: 2.08 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.213 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.874α = 90
b = 150.246β = 90
c = 24.24γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-12-11
    Type: Initial release
  • Version 1.1: 2014-02-12
    Changes: Database references
  • Version 1.2: 2014-09-24
    Changes: Database references
  • Version 1.3: 2017-11-15
    Changes: Refinement description