3A7M

Structure of FliT, the flagellar type III chaperone for FliD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.252 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural insight into the regulatory mechanisms of interactions of the flagellar type III chaperone FliT with its binding partners.

Imada, K.Minamino, T.Kinoshita, M.Furukawa, Y.Namba, K.

(2010) Proc Natl Acad Sci U S A 107: 8812-8817

  • DOI: 10.1073/pnas.1001866107
  • Primary Citation of Related Structures:  
    3A7M

  • PubMed Abstract: 
  • For self-assembly of the bacterial flagellum, most of the flagellar component proteins synthesized in the cytoplasm are exported by the flagellar type III export apparatus to the growing, distal end. Flagellar protein export is highly organized and well controlled in every step of the flagellar assembly process ...

    For self-assembly of the bacterial flagellum, most of the flagellar component proteins synthesized in the cytoplasm are exported by the flagellar type III export apparatus to the growing, distal end. Flagellar protein export is highly organized and well controlled in every step of the flagellar assembly process. Flagellar-specific chaperones not only facilitate the export of their cognate proteins, as well as prevent their premature aggregation in the cytoplasm, but also play a role in fine-tuning flagellar gene expression to be coupled with the flagellar assembly process. FliT is a flagellar-specific chaperone responsible for the export of the filament-capping protein FliD and for negative control of flagellar gene expression by binding to the FlhDC complex. Here we report the crystal structure of Salmonella FliT at 3.2-A resolution. The structural and biochemical analyses clearly reveal that the C-terminal segment of FliT regulates its interactions with the FlhDC complex, FliI ATPase, and FliJ (subunits of the export apparatus), and that its conformational change is responsible for the switch in its binding partners during flagellar protein export.


    Organizational Affiliation

    Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan. kimada@fbs.osaka-u.ac.jp



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar protein fliTA, B122Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: fliTSTM1962
UniProt
Find proteins for P0A1N2 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0A1N2 
Go to UniProtKB:  P0A1N2
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.252 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.34α = 90
b = 121.34β = 90
c = 58.7γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
SOLVEphasing
CNSrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-04-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance