1IO1 | pdb_00001io1

CRYSTAL STRUCTURE OF F41 FRAGMENT OF FLAGELLIN

• PDB DOI: https://doi.org/10.2210/pdb1IO1/pdb

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


• Deposited: 2000-12-28 Released: 2001-04-04 
• Deposition Author(s): Samatey, F.A., Imada, K., Nagashima, S., Vondervisz, F., Kumasaka, T., Yamamoto, M., Namba, K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 
  0.266 (Depositor) 
• R-Value Work: 
  0.234 (Depositor), 0.231 (DCC) 

Literature

Structure of the bacterial flagellar protofilament and implications for a switch for supercoiling

Samatey, F.A., Imada, K., Nagashima, S., Vondervisz, F., Kumasaka, T., Yamamoto, M., Namba, K.

(2001) Nature 410: 331-337

• PubMed: 11268201 
• DOI: https://doi.org/10.1038/35066504
• Primary Citation Related Structures: 
  1IO1


• PubMed Abstract: 
  

  The bacterial flagellar filament is a helical propeller constructed from 11 protofilaments of a single protein, flagellin. The filament switches between left- and right-handed supercoiled forms when bacteria switch their swimming mode between running and tumbling. Supercoiling is produced by two different packing interactions of flagellin called L and R. In switching from L to R, the intersubunit distance ( approximately 52 A) along the protofilament decreases by 0.8 A. Changes in the number of L and R protofilaments govern supercoiling of the filament. Here we report the 2.0 A resolution crystal structure of a Salmonella flagellin fragment of relative molecular mass 41,300. The crystal contains pairs of antiparallel straight protofilaments with the R-type repeat. By simulated extension of the protofilament model, we have identified possible switch regions responsible for the bi-stable mechanical switch that generates the 0.8 A difference in repeat distance.

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Organizational Affiliation: 
• Protonic NanoMachine Project, ERATO, JST, 3-4 Hikaridai, Seika, Kyoto 619-0237, Japan.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 41.35 kDa 
• Atom Count: 3,234 
• Modeled Residue Count: 395 
• Deposited Residue Count: 398 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PHASE 1 FLAGELLIN	A	398	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: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free:  0.266 (Depositor) 
• R-Value Work:  0.234 (Depositor), 0.231 (DCC) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.75	α = 90
b = 36.44	β = 91.15
c = 118.35	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
SOLVE	phasing
X-PLOR	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-04-04 
Deposition Author(s): Samatey, F.A., Imada, K., Nagashima, S., Vondervisz, F., Kumasaka, T., Yamamoto, M., Namba, K.

Revision History  

• Version 1.0: 2001-04-04
  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: 2023-12-27
  Changes: Data collection, Database references