4HVZ

Crystal structure of brucella abortus immunogenic BP26 protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Brucella Immunogenic BP26 Forms a Channel-like Structure.

Kim, D.Park, J.Kim, S.J.Soh, Y.M.Kim, H.M.Oh, B.H.Song, J.J.

(2013) J.Mol.Biol. 425: 1119-1126

  • DOI: 10.1016/j.jmb.2013.01.015

  • PubMed Abstract: 
  • An outer membrane protein BP26/OMP28 of Brucella, BP26, is identified as a major immunodominant antigen and widely used as a diagnostic marker and for vaccination against Brucellosis. BP26 belongs to the family of proteins that contains a SIMPL (sign ...

    An outer membrane protein BP26/OMP28 of Brucella, BP26, is identified as a major immunodominant antigen and widely used as a diagnostic marker and for vaccination against Brucellosis. BP26 belongs to the family of proteins that contains a SIMPL (signaling molecule that associates with the mouse pelle-like kinase) domain, whose structure and function have been unknown. Here, we present the crystal structure of BP26 revealing that 16 BP26 molecules form a novel channel-like assembly as also shown by electron microscopy analysis. Eight BP26 molecules forming a ring structure contain a hole at the center of the octamer, and another octamer interacts with each other to form a channel having a large internal cavity. BP26 is found to be structurally similar to a bacteriophage protein involved in infection, implicating that BP26 might function during Brucella infection. In addition, the BP26 structure suggests that the protein functions as a multimeric channel-like form and provides a canonical model for the SIMPL domains.


    Organizational Affiliation

    Department of Biological Sciences, KI for the BioCentury, KAIST, 335 Gwahangno, Daejeon 305-701, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
26 kDa periplasmic immunogenic protein
A, B, C, D
224Brucella abortus (strain S19)Gene Names: bp26
Find proteins for Q44642 (Brucella abortus (strain S19))
Go to UniProtKB:  Q44642
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.237 
  • Space Group: I 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 203.086α = 90.00
b = 203.086β = 90.00
c = 207.295γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection
SOLVEphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-30
    Type: Initial release
  • Version 1.1: 2013-02-13
    Type: Database references
  • Version 1.2: 2013-04-03
    Type: Database references