Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 51.55 kDa 
• Atom Count: 3617 
• Residue Count: 494 
• Unique protein chains: 1

1UCU

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

• DOI: 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 

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: 10.1038/nature01830
• Primary Citation of 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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Related Citations: 

• Structure of the bacterial flagellar protofilament and implications for a switch for supercoiling
  Samatey, F.A., Imada, K., Nagashima, S., Vonderviszt, F., Kumasaka, T., Yamamoto, M., Namba, K.
  (2001) Nature 410: 331

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Organizational Affiliation: 

Protonic NanoMachine Project, ERATO, JST.

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
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

• Deposited Date: 2003-04-22 
• 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