3TEE

Crystal Structure of Salmonella FlgA in open form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 

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This is version 1.1 of the entry. See complete history


Literature

Structural flexibility of the periplasmic protein, FlgA, regulates flagellar P-ring assembly in Salmonella enterica

Matsunami, H.Yoon, Y.H.Meshcheryakov, V.A.Namba, K.Samatey, F.A.

(2016) Sci Rep 6: 27399-27399

  • DOI: 10.1038/srep27399
  • Primary Citation of Related Structures:  
    3TEE, 3VJP, 3VKI

  • PubMed Abstract: 
  • A periplasmic flagellar chaperone protein, FlgA, is required for P-ring assembly in bacterial flagella of taxa such as Salmonella enterica or Escherichia coli. The mechanism of chaperone-mediated P-ring formation is poorly understood. Here we present the open and closed crystal structures of FlgA from Salmonella enterica serovar Typhimurium, grown under different crystallization conditions ...

    A periplasmic flagellar chaperone protein, FlgA, is required for P-ring assembly in bacterial flagella of taxa such as Salmonella enterica or Escherichia coli. The mechanism of chaperone-mediated P-ring formation is poorly understood. Here we present the open and closed crystal structures of FlgA from Salmonella enterica serovar Typhimurium, grown under different crystallization conditions. An intramolecular disulfide cross-linked form of FlgA caused a dominant negative effect on motility of the wild-type strain. Pull-down experiments support a specific protein-protein interaction between FlgI, the P-ring component protein, and the C-terminal domain of FlgA. Surface plasmon resonance and limited-proteolysis indicate that flexibility of the domain is reduced in the covalently closed form. These results show that the structural flexibility of the C-terminal domain of FlgA, which is related to the structural difference between the two crystal forms, is intrinsically associated with its molecular chaperone function in P-ring assembly.


    Organizational Affiliation

    Trans-Membrane Trafficking Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna, Kunigami, Okinawa 904-0495, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Flagella basal body P-ring formation protein flgAA219Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Gene Names: flgA
UniProt
Find proteins for P40131 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P40131 
Go to UniProtKB:  P40131
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP40131
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 
  • Space Group: C 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.52α = 90
b = 131.77β = 90
c = 49.36γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SOLVEphasing
BUSTERrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-08-15
    Type: Initial release
  • Version 1.1: 2016-07-06
    Changes: Database references