6SIH

Structure of bacterial flagellar capping protein FliD


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The cryo-EM structure of the bacterial flagellum cap complex suggests a molecular mechanism for filament elongation.

Al-Otaibi, N.S.Taylor, A.J.Farrell, D.P.Tzokov, S.B.DiMaio, F.Kelly, D.J.Bergeron, J.R.C.

(2020) Nat Commun 11: 3210-3210

  • DOI: 10.1038/s41467-020-16981-4
  • Primary Citation of Related Structures:  
    6SIH

  • PubMed Abstract: 
  • The bacterial flagellum is a remarkable molecular motor, whose primary function in bacteria is to facilitate motility through the rotation of a filament protruding from the bacterial cell. A cap complex, consisting of an oligomer of the protein FliD, is localized at the tip of the flagellum, and is essential for filament assembly, as well as adherence to surfaces in some bacteria ...

    The bacterial flagellum is a remarkable molecular motor, whose primary function in bacteria is to facilitate motility through the rotation of a filament protruding from the bacterial cell. A cap complex, consisting of an oligomer of the protein FliD, is localized at the tip of the flagellum, and is essential for filament assembly, as well as adherence to surfaces in some bacteria. However, the structure of the intact cap complex, and the molecular basis for its interaction with the filament, remains elusive. Here we report the cryo-EM structure of the Campylobacter jejuni cap complex, which reveals that FliD is pentameric, with the N-terminal region of the protomer forming an extensive set of contacts across several subunits, that contribute to FliD oligomerization. We also demonstrate that the native C. jejuni flagellum filament is 11-stranded, contrary to a previously published cryo-EM structure, and propose a molecular model for the filament-cap interaction.


    Organizational Affiliation

    Randall Division of Cell and Molecular Biophysics, King's College London, London, UK. julien.bergeron@kcl.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar hook-associated protein 2663Campylobacter jejuniMutation(s): 0 
Gene Names: fliDEC071_02365B9U92_06665CT954_02345GXS76_000046
UniProt
Find proteins for A0A3I4YJR7 (Campylobacter jejuni)
Explore A0A3I4YJR7 
Go to UniProtKB:  A0A3I4YJR7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A3I4YJR7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited Kingdom--

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-27
    Type: Initial release
  • Version 1.1: 2020-06-03
    Changes: Database references
  • Version 1.2: 2020-07-08
    Changes: Database references