6K3I

Salmonella hook in curved state - 66 subunit models


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.86 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Torque transmission mechanism of the curved bacterial flagellar hook revealed by cryo-EM.

Shibata, S.Matsunami, H.Aizawa, S.I.Wolf, M.

(2019) Nat Struct Mol Biol 26: 941-945

  • DOI: 10.1038/s41594-019-0301-3
  • Primary Citation of Related Structures:  
    6K3I

  • PubMed Abstract: 
  • Bacterial locomotion by rotating flagella is achieved through the hook, which transmits torque from the motor to the filament. The hook is a tubular structure composed of a single type of protein, yet it adopts a curved shape. To perform its function, it must be simultaneously flexible and torsionally rigid ...

    Bacterial locomotion by rotating flagella is achieved through the hook, which transmits torque from the motor to the filament. The hook is a tubular structure composed of a single type of protein, yet it adopts a curved shape. To perform its function, it must be simultaneously flexible and torsionally rigid. The molecular mechanism by which chemically identical subunits form such a dynamic structure is unknown. Here, we show the complete structure of the hook from Salmonella enterica in its supercoiled 'curved' state, at 2.9 Å resolution. Subunits in the curved hook are grouped into 11 distinctive conformations, each shared along 11 protofilaments. The domains of the elongated hook subunit behave as rigid bodies connected by two hinge regions. The reconstituted model demonstrates how identical subunits can dynamically change conformation by physical interactions while bending. These multiple subunit states contradict the two-state model, which is a key feature of flagellar polymorphism.


    Organizational Affiliation

    Molecular Cryo-Electron Microscopy Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa, Japan. matthias.wolf@oist.jp.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar hook protein FlgEAAABACADAEAFAGAHAAABACADAEAFAGAHAIAJAKBABBBCBDBEBFBGBHBIBJBKCACBCCCDCECFCGCHCICJCKDADBDCDDDEDFDGDHDIDJDKEAEBECEDEEEFEGEHEIEJEKFAFBFCFDFEFFFGFHFIFJFK
402Salmonella enterica subsp. enterica serovar Typhimurium str. LT2Mutation(s): 0 
Gene Names: flgEfla FVflaKSTM1177
Find proteins for P0A1J1 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0A1J1 
Go to UniProtKB:  P0A1J1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.86 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Agency for Medical Research and Development (AMED)JapanJP18am0101076
Japan Society for the Promotion of ScienceJapan17K17085
Japan Society for the Promotion of ScienceJapan19K10083
Japan Society for the Promotion of ScienceJapan17K07318

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-02
    Type: Initial release
  • Version 1.1: 2019-10-16
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Database references