Structure of RavA (lpp0008) E38A/K39A surface entropy reduction mutant

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

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Structural and functional study of Legionella pneumophila effector RavA.

Chung, I.Y.W.Li, L.Tyurin, O.Gagarinova, A.Wibawa, R.Li, P.Hartland, E.L.Cygler, M.

(2021) Protein Sci 30: 940-955

  • DOI: https://doi.org/10.1002/pro.4057
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Legionella pneumophila is an intracellular pathogen that causes Legionnaire's disease in humans. This bacterium can be found in freshwater environments as a free-living organism, but it is also an intracellular parasite of protozoa. Human infection occurs when inhaled aerosolized pathogen comes into contact with the alveolar mucosa and replicates in alveolar macrophages. Legionella enters the host cell by phagocytosis and redirects the Legionella-containing phagosomes from the phagocytic maturation pathway. These nascent phagosomes fuse with ER-derived secretory vesicles and membranes forming the Legionella-containing vacuole. Legionella subverts many host cellular processes by secreting over 300 effector proteins into the host cell via the Dot/Icm type IV secretion system. The cellular function for many Dot/Icm effectors is still unknown. Here, we present a structural and functional study of L. pneumophila effector RavA (Lpg0008). Structural analysis revealed that the RavA consists of four ~85 residue long α-helical domains with similar folds, which show only a low level of structural similarity to other protein domains. The ~90 residues long C-terminal segment is predicted to be natively unfolded. We show that during L. pneumophila infection of human cells, RavA localizes to the Golgi apparatus and to the plasma membrane. The same localization is observed when RavA is expressed in human cells. The localization signal resides within the C-terminal sequence C 409 WTSFCGLF 417 . Yeast-two-hybrid screen using RavA as bait identified RAB11A as a potential binding partner. RavA is present in L. pneumophila strains but only distant homologs are found in other Legionella species, where the number of repeats varies.

  • Organizational Affiliation

    Department of Biochemistry, Microbiology and Immunology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
331Legionella pneumophila str. ParisMutation(s): 2 
Gene Names: D1H98_04490
Find proteins for A0A3A6VZ03 (Legionella pneumophila subsp. pneumophila)
Explore A0A3A6VZ03 
Go to UniProtKB:  A0A3A6VZ03
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A3A6VZ03
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: P 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.46α = 90
b = 62.67β = 90
c = 286.93γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada--

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-17
    Type: Initial release
  • Version 1.1: 2021-04-21
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references