Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 62670.17 
• Atom Count: 4312 
• Residue Count: 598 
• Unique protein chains: 1

1WLG

Crystal structure of FlgE31, a major fragment of the hook protein

• DOI: 10.2210/pdb1WLG/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)
• Expression System: Escherichia coli


• Deposited: 2004-06-25 Released: 2004-11-02 
• Deposition Author(s): Samatey, F.A., Matsunami, H., Imada, K., Nagashima, S., Shaikh, T.R., Thomas, D.R., DeRosier, D.J., Kitao, A., Namba, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.242 
• R-Value Work: 0.190 

Literature

Structure of the bacterial flagellar hook and implication for the molecular universal joint mechanism.

Samatey, F.A., Matsunami, H., Imada, K., Nagashima, S., Shaikh, T.R., Thomas, D.R., Chen, J.Z., Derosier, D.J., Kitao, A., Namba, K.

(2004) Nature 431: 1062-1068

• PubMed: 15510139 
• DOI: 10.1038/nature02997
• Also Cited By: 2BGZ, 2BGY


• PubMed Abstract: 
  

The bacterial flagellum is a motile organelle, and the flagellar hook is a short, highly curved tubular structure that connects the flagellar motor to the long filament acting as a helical propeller. The hook is made of about 120 copies of a single protein, FlgE, and its function as a nano-sized universal joint is essential for dynamic and efficient bacterial motility and taxis. It transmits the motor torque to the helical propeller over a wide range of its orientation for swimming and tumbling. Here we report a partial atomic model of the hook obtained by X-ray crystallography of FlgE31, a major proteolytic fragment of FlgE lacking unfolded terminal regions, and by electron cryomicroscopy and three-dimensional helical image reconstruction of the hook. The model reveals the intricate molecular interactions and a plausible switching mechanism for the hook to be flexible in bending but rigid against twisting for its universal joint function.

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Organizational Affiliation: 

Dynamic NanoMachine Project, ICORP, JST, 1-3 Yamadaoka, Suita, Osaka 565-0871, Japan.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Flagellar hook protein flgE	A, B	299	Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)	Mutation(s): 0  Gene Names: flgE (fla FV, flaK)
Find proteins for P0A1J1 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Go to UniProtKB:  P0A1J1

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.242 
• R-Value Work: 0.190 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 128.714	α = 90.00
b = 49.034	β = 90.00
c = 96.904	γ = 90.00

Software Package:

Software Name	Purpose
MOSFLM	data reduction
REFMAC	refinement
SOLVE	phasing
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-06-25 
• Released Date: 2004-11-02 
• Deposition Author(s): Samatey, F.A., Matsunami, H., Imada, K., Nagashima, S., Shaikh, T.R., Thomas, D.R., DeRosier, D.J., Kitao, A., Namba, K.

Revision History 

• Version 1.0: 2004-11-02
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2014-04-16
  Type: Other