3S02

The crystal structure of the periplasmic domain of Helicobacter pylori MotB (residues 103-256)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Role of the MotB linker in the assembly and activation of the bacterial flagellar motor.

O'Neill, J.Xie, M.Hijnen, M.Roujeinikova, A.

(2011) Acta Crystallogr.,Sect.D 67: 1009-1016

  • DOI: 10.1107/S0907444911041102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacterial flagella are driven by an ion influx through the peptidoglycan (PG)-tethered MotA/MotB stator. Stator precomplexes assemble in the membrane and remain inactive until they incorporate into the motor, upon which MotA/MotB changes conformation ...

    Bacterial flagella are driven by an ion influx through the peptidoglycan (PG)-tethered MotA/MotB stator. Stator precomplexes assemble in the membrane and remain inactive until they incorporate into the motor, upon which MotA/MotB changes conformation. The nature of this change and the mechanism of inhibition of the PG-binding and ion-conducting activities of the precomplexes are unknown. Here, the structural analysis of a series of N-terminally truncated MotB fragments is presented, the mechanism of inhibition by the linker is identified and the structural basis for the formation of the PG-binding-competent open-channel MotA/MotB conformation via a mechanism that entails linker unfolding and rotational displacement of MotB transmembrane helices is uncovered.


    Related Citations: 
    • Cloning, purification and crystallization of MotB, a stator component of the proton-driven bacterial flagellar motor.
      O'Neill, J.,Roujeinikova, A.
      (2008) Acta Crystallogr.,Sect.F 64: 561


    Organizational Affiliation

    Manchester Interdisciplinary Biocentre, University of Manchester, 131 Princess Street, Manchester M1 7DN, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Motility protein B
A, B
154Helicobacter pylori (strain ATCC 700392 / 26695)Mutation(s): 0 
Gene Names: motB
Find proteins for P56427 (Helicobacter pylori (strain ATCC 700392 / 26695))
Go to UniProtKB:  P56427
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.181 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 75.803α = 90.00
b = 75.803β = 90.00
c = 140.811γ = 120.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
SCALAdata scaling
MOSFLMdata reduction
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-05-12 
  • Released Date: 2012-03-14 
  • Deposition Author(s): Roujeinikova, A.R.

Revision History 

  • Version 1.0: 2012-03-14
    Type: Initial release