3S06

The crystal structure of the periplasmic domain of Helicobacter pylori MotB (residues 97-256, P3121).


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 

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 D Biol Crystallogr 67: 1009-1016

  • DOI: 10.1107/S0907444911041102
  • Primary Citation of Related Structures:  
    3S02, 3S03, 3S06, 3S0H, 3S0W, 3S0Y

  • 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. The nature of this change and the mechanism of inhibition of the PG-binding and ion-conducting activities of the precomplexes are unknown ...

    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.
      () To be published --: --

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Motility protein BA, B166Helicobacter pylori 26695Mutation(s): 0 
Gene Names: HP_0816motB
UniProt
Find proteins for P56427 (Helicobacter pylori (strain ATCC 700392 / 26695))
Explore P56427 
Go to UniProtKB:  P56427
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP56427
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.172 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.714α = 90
b = 70.714β = 90
c = 143.421γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2011-05-13 
  • Released Date: 2012-03-14 
  • Deposition Author(s): Roujeinikova, A.R.

Revision History  (Full details and data files)

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