Near-atomic resolution analysis of BipD- A component of the type-III secretion system of Burkholderia pseudomallei

Experimental Data Snapshot

  • Resolution: 1.51 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 

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Near-atomic resolution analysis of BipD, a component of the type III secretion system of Burkholderia pseudomallei.

Pal, M.Erskine, P.T.Gill, R.S.Wood, S.P.Cooper, J.B.

(2010) Acta Crystallogr Sect F Struct Biol Cryst Commun 66: 990-993

  • DOI: https://doi.org/10.1107/S1744309110026333
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Burkholderia pseudomallei, the causative agent of melioidosis, possesses a type III protein secretion apparatus that is similar to those found in Salmonella and Shigella. A major function of these secretion systems is to inject virulence-associated proteins into target cells of the host organism. The bipD gene of B. pseudomallei encodes a secreted virulence factor that is similar in sequence and is most likely to be functionally analogous to IpaD from Shigella and SipD from Salmonella. Proteins in this family are thought to act as extracellular chaperones at the tip of the secretion needle to help the hydrophobic translocator proteins enter the target cell membrane, where they form a pore and may also link the translocon pore with the secretion needle. BipD has been crystallized in a monoclinic crystal form that diffracted X-rays to 1.5 A resolution and the structure was refined to an R factor of 16.1% and an Rfree of 19.8% at this resolution. The putative dimer interface that was observed in previous crystal structures was retained and a larger surface area was buried in the new crystal form.

  • Organizational Affiliation

    School of Biological Sciences, University of Southampton, Bassett Crescent East, Southampton SO16 7PX, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Translocator protein bipD303Burkholderia pseudomalleiMutation(s): 0 
Gene Names: bipDBPSS1529
Find proteins for Q63K37 (Burkholderia pseudomallei (strain K96243))
Explore Q63K37 
Go to UniProtKB:  Q63K37
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ63K37
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.51 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.161 
  • R-Value Observed: 0.161 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.15α = 90
b = 60.42β = 96.01
c = 90.415γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Refinement description