3QQ2

Crystal Structure of the Beta Domain of the Bordetella Autotransporter Brka


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.266 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Autotransporter passenger domain secretion requires a hydrophobic cavity at the extracellular entrance of the beta-domain pore

Zhai, Y.Zhang, K.Huo, Y.Zhu, Y.Zhou, Q.Lu, J.Black, I.Pang, X.Roszak, A.W.Zhang, X.Isaacs, N.W.Sun, F.

(2011) Biochem.J. 435: 577-587

  • DOI: 10.1042/BJ20101548

  • PubMed Abstract: 
  • Whooping cough (pertussis) is a highly contagious acute respiratory illness of humans caused by the Gram-negative bacterial pathogen Bordetella pertussis. The AT (autotransporter) BrkA (Bordetella serum-resistance killing protein A) is an important B ...

    Whooping cough (pertussis) is a highly contagious acute respiratory illness of humans caused by the Gram-negative bacterial pathogen Bordetella pertussis. The AT (autotransporter) BrkA (Bordetella serum-resistance killing protein A) is an important B. pertussis virulence factor that confers serum resistance and mediates adherence. In the present study, we have solved the crystal structure of the BrkA β-domain at 3 Å (1 Å=0.1 nm) resolution. Special features are a hairpin-like structure formed by the external loop L4, which is observed fortuitously sitting inside the pore of the crystallographic adjacent β-domain, and a previously undiscovered hydrophobic cavity formed by patches on loop L4 and β-strands S5 and S6. This adopts a ubiquitous structure characteristic of all AT β-domains. Mutagenesis studies have demonstrated that the hairpin-like structure and hydrophobic cavity are crucial for BrkA passenger domain (virulence effector) translocation. This structure helps in understanding the molecular mechanism of AT assembly and secretion and provides a potential target for anti-pertussis drug design.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BrkA autotransporter
A, B, C
284Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251)Mutation(s): 1 
Gene Names: brkA
Find proteins for Q45340 (Bordetella pertussis (strain Tohama I / ATCC BAA-589 / NCTC 13251))
Go to UniProtKB:  Q45340
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.324 
  • R-Value Work: 0.266 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 60.510α = 90.00
b = 122.372β = 90.00
c = 405.549γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
MAR345dtbdata collection
HKL-2000data reduction
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance