Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 41.47 kDa 
• Atom Count: 3352 
• Residue Count: 363 
• Unique protein chains: 1

2ZVY

Structure of the periplasmic domain of MotB from Salmonella (crystal form II)

• DOI: 10.2210/pdb2ZVY/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-11-26 Released: 2009-09-01 
• Deposition Author(s): Kojima, S., Homma, M., Namba, K., Imada, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.204 
• R-Value Work: 0.187 
• R-Value Observed: 0.187 

Literature

Stator assembly and activation mechanism of the flagellar motor by the periplasmic region of MotB

Kojima, S., Imada, K., Sakuma, M., Sudo, Y., Kojima, C., Minamino, T., Homma, M., Namba, K.

(2009) Mol Microbiol 73: 710-718

• PubMed: 19627504 
• DOI: 10.1111/j.1365-2958.2009.06802.x
• Primary Citation of Related Structures:  
  2ZVY, 2ZVZ, 2ZOV


• PubMed Abstract: 
  

Torque generation in the Salmonella flagellar motor is coupled to translocation of H(+) ions through the proton-conducting channel of the Mot protein stator complex. The Mot complex is believed to be anchored to the peptidoglycan (PG) layer by the putative peptidoglycan-binding (PGB) domain of MotB. Proton translocation is activated only when the stator is installed into the motor. We report the crystal structure of a C-terminal periplasmic fragment of MotB (MotB(C)) that contains the PGB domain and includes the entire periplasmic region essential for motility. Structural and functional analyses indicate that the PGB domains must dimerize in order to form the proton-conducting channel. Drastic conformational changes in the N-terminal portion of MotB(C) are required both for PG binding and the proton channel activation.

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Organizational Affiliation: 

Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa-Ku, Nagoya 464-8602, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Chemotaxis protein motB	A, B	183	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0  Gene Names: motB
Find proteins for P55892 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P55892  Go to UniProtKB:  P55892

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.204 
• R-Value Work: 0.187 
• R-Value Observed: 0.187 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.25	α = 90
b = 86.4	β = 90
c = 129.91	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
ADSC	data collection
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-11-26 
• Released Date: 2009-09-01 
Deposition Author(s): Kojima, S., Homma, M., Namba, K., Imada, K.

Revision History 

• Version 1.0: 2009-09-01
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance