Crystal structure of MotY

Experimental Data Snapshot

  • Resolution: 2.85 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.290 
  • R-Value Observed: 0.290 

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Insights into the stator assembly of the Vibrio flagellar motor from the crystal structure of MotY

Kojima, S.Shinohara, A.Terashima, H.Yakushi, T.Sakuma, M.Homma, M.Namba, K.Imada, K.

(2008) Proc Natl Acad Sci U S A 105: 7696-7701

  • DOI: https://doi.org/10.1073/pnas.0800308105
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Rotation of the sodium-driven polar flagellum of Vibrio alginolyticus requires four motor proteins: PomA, PomB, MotX, and MotY. PomA and PomB form a sodium-ion channel in the cytoplasmic membrane that functions as a stator complex to couple sodium-ion flux with torque generation. MotX and MotY are components of the T-ring, which is located beneath the P-ring of the polar flagellar basal body and is involved in incorporation of the PomA/PomB complex into the motor. Here, we describe the determination of the crystal structure of MotY at 2.9 A resolution. The structure shows two distinct domains: an N-terminal domain (MotY-N) and a C-terminal domain (MotY-C). MotY-N has a unique structure. MotY-C contains a putative peptidoglycan-binding motif that is remarkably similar to those of peptidoglycan-binding proteins, such as Pal and RmpM, but this region is disordered in MotY. Motility assay of cells producing either of the MotY-N and MotY-C fragments and subsequent biochemical analyses indicate that MotY-N is essential for association of the stator units around the rotor, whereas MotY-C stabilizes the association by binding to the peptidoglycan layer. Based on these observations, we propose a model for the mechanism of stator assembly around the rotor.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Component of sodium-driven polar flagellar motor278Vibrio alginolyticusMutation(s): 0 
Gene Names: MotY
Find proteins for P74944 (Vibrio alginolyticus)
Explore P74944 
Go to UniProtKB:  P74944
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP74944
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.85 Å
  • R-Value Free: 0.312 
  • R-Value Work: 0.290 
  • R-Value Observed: 0.290 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.081α = 90
b = 104.081β = 90
c = 133.103γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance