L-type straight flagellar filament made of full-length flagellin

Experimental Data Snapshot

  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

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This is version 1.4 of the entry. See complete history


Conformational change of flagellin for polymorphic supercoiling of the flagellar filament

Maki-Yonekura, S.Yonekura, K.Namba, K.

(2010) Nat Struct Mol Biol 17: 417-422

  • DOI: https://doi.org/10.1038/nsmb.1774
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The bacterial flagellar filament is a helical propeller rotated by the flagellar motor for bacterial locomotion. The filament is a supercoiled assembly of a single protein, flagellin, and is formed by 11 protofilaments. For bacterial taxis, the reversal of motor rotation switches the supercoil between left- and right-handed, both of which arise from combinations of two distinct conformations and packing interactions of the L-type and R-type protofilaments. Here we report an atomic model of the L-type straight filament by electron cryomicroscopy and helical image analysis. Comparison with the R-type structure shows interesting features: an orientation change of the outer core domains (D1) against the inner core domains (D0) showing almost invariant orientation and packing, a conformational switching within domain D1, and the conformational flexibility of domains D0 and D1 with their spoke-like connection for tight molecular packing.

  • Organizational Affiliation

    Dynamic NanoMachine Project, International Cooperative Research Project, Japan Science and Technology Agency, Suita, Osaka, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Flagellin494Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Find proteins for P06179 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P06179 
Go to UniProtKB:  P06179
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06179
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-10-16
    Changes: Database references
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence, Data collection, Database references
  • Version 1.4: 2024-03-13
    Changes: Data collection, Database references