6GOW | pdb_00006gow

Crystal structure of the flagellin-FliS complex from Bacillus subtilis crystallized in spacegroup P22121

• PDB DOI: https://doi.org/10.2210/pdb6GOW/pdb

• Classification: CHAPERONE
• Organism(s): Bacillus subtilis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2018-06-04 Released: 2018-08-29 
• Deposition Author(s): Altegoer, F., Bange, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 
  0.204 (Depositor), 0.203 (DCC) 
• R-Value Work: 
  0.175 (Depositor), 0.176 (DCC) 
• R-Value Observed: 
  0.177 (Depositor) 

Starting Model: experimental

Literature

FliS/flagellin/FliW heterotrimer couples type III secretion and flagellin homeostasis.

Altegoer, F., Mukherjee, S., Steinchen, W., Bedrunka, P., Linne, U., Kearns, D.B., Bange, G.

(2018) Sci Rep 8: 11552-11552

• PubMed: 30068950 
• DOI: https://doi.org/10.1038/s41598-018-29884-8
• Primary Citation Related Structures: 
  5MAW, 6GOW


• PubMed Abstract: 
  

  Flagellin is amongst the most abundant proteins in flagellated bacterial species and constitutes the major building block of the flagellar filament. The proteins FliW and FliS serve in the post-transcriptional control of flagellin and guide the protein to the flagellar type III secretion system (fT3SS), respectively. Here, we present the high-resolution structure of FliS/flagellin heterodimer and show that FliS and FliW bind to opposing interfaces located at the N- and C-termini of flagellin. The FliS/flagellin/FliW heterotrimer is able to interact with FlhA-C suggesting that FliW and FliS are released during flagellin export. After release, FliW and FliS are recycled to execute a new round of post-transcriptional regulation and targeting. Taken together, our study provides a mechanism explaining how FliW and FliS synchronize the production of flagellin with the capacity of the fT3SS to secrete flagellin.

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Organizational Affiliation: 
• LOEWE Center for Synthetic Microbiology & Dep. of Chemistry, Philipps University Marburg, Hans-Meerwein-Strasse 6, 35043, Marburg, Germany.
Department of Biology, Indiana University, 1001 East 3rd Street, Bloomington, IN, 47405, USA.
LOEWE Center for Synthetic Microbiology & Dep. of Chemistry, Philipps University Marburg, Hans-Meerwein-Strasse 6, 35043, Marburg, Germany. [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: SAXS, gel filtration

Macromolecule Content 

• Total Structure Weight: 47.81 kDa 
• Atom Count: 3,149 
• Modeled Residue Count: 366 
• Deposited Residue Count: 437 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellin	A [auth D]	304	Bacillus subtilis	Mutation(s): 0  Gene Names: B4417_3365
UniProt
Find proteins for P02968 (Bacillus subtilis (strain 168)) Explore P02968  Go to UniProtKB:  P02968

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Flagellar secretion chaperone FliS	B [auth E]	133	Bacillus subtilis	Mutation(s): 0  Gene Names: B4417_3362, SC09_contig4orf00739
UniProt
Find proteins for P39739 (Bacillus subtilis (strain 168)) Explore P39739  Go to UniProtKB:  P39739

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free:  0.204 (Depositor), 0.203 (DCC) 
• R-Value Work:  0.175 (Depositor), 0.176 (DCC) 
• R-Value Observed: 0.177 (Depositor) 

Space Group: P 2 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.86	α = 90
b = 89.956	β = 90
c = 116.079	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2018-08-29 
Deposition Author(s): Altegoer, F., Bange, G.

Revision History  

• Version 1.0: 2018-08-29
  Type: Initial release
  
• Version 1.1: 2024-01-17
  Changes: Data collection, Database references, Refinement description