1UCU | pdb_00001ucu

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

• PDB DOI: https://doi.org/10.2210/pdb1UCU/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Mutation(s): No 


• Deposited: 2003-04-22 Released: 2003-08-12 
• Deposition Author(s): Yonekura, K., Maki-Yonekura, S., Namba, K.

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Experimental Data Snapshot

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

Starting Model: experimental

Literature

Complete atomic model of the bacterial flagellar filament by electron cryomicroscopy

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

(2003) Nature 424: 643-650

• PubMed: 12904785 
• DOI: https://doi.org/10.1038/nature01830
• Primary Citation Related Structures: 
  1UCU


• PubMed Abstract: 
  

  The bacterial flagellar filament is a helical propeller for bacterial locomotion. It is a helical assembly of a single protein, flagellin, and its tubular structure is formed by 11 protofilaments in two distinct conformations, L- and R-type, for supercoiling. The X-ray crystal structure of a flagellin fragment lacking about 100 terminal residues revealed the protofilament structure, but the full filament structure is still essential for understanding the mechanism of supercoiling and polymerization. Here we report a complete atomic model of the R-type filament by electron cryomicroscopy. A density map obtained from image data up to 4 A resolution shows the feature of alpha-helical backbone and some large side chains. The atomic model built on the map reveals intricate molecular packing and an alpha-helical coiled coil formed by the terminal chains in the inner core of the filament, with its intersubunit hydrophobic interactions having an important role in stabilizing the filament.

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Organizational Affiliation: 
• Protonic NanoMachine Project, ERATO, JST.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 51.55 kDa 
• Atom Count: 3,617 
• Modeled Residue Count: 494 
• Deposited Residue Count: 494 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
phase 1 Flagellin	A	494	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
UniProt
Find proteins for P06179 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P06179  Go to UniProtKB:  P06179

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-08-12 
Deposition Author(s): Yonekura, K., Maki-Yonekura, S., Namba, K.

Revision History  

• Version 1.0: 2003-08-12
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-03-13
  Changes: Author supporting evidence, Data collection, Database references, Experimental preparation, Refinement description, Structure summary