7QYI | pdb_00007qyi

Solution structure of the DNA-binding minor pilin FimT from Legionella pneumophila

• PDB DOI: https://doi.org/10.2210/pdb7QYI/pdb
• BMRB: 34704

• Classification: DNA BINDING PROTEIN
• Organism(s): Legionella pneumophila
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2022-01-28 Released: 2022-03-02 
• Deposition Author(s): Braus, S.A.G., Hospenthal, M.K., Gossert, A.D.
• Funding Organization(s): Swiss National Science Foundation

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

The molecular basis of FimT-mediated DNA uptake during bacterial natural transformation.

Braus, S.A.G., Short, F.L., Holz, S., Stedman, M.J.M., Gossert, A.D., Hospenthal, M.K.

(2022) Nat Commun 13: 1065-1065

• PubMed: 35246533 
• DOI: https://doi.org/10.1038/s41467-022-28690-1
• Primary Citation Related Structures: 
  7QYI


• PubMed Abstract: 
  

  Naturally competent bacteria encode sophisticated protein machinery for the uptake and translocation of exogenous DNA into the cell. If this DNA is integrated into the bacterial genome, the bacterium is said to be naturally transformed. Most competent bacterial species utilise type IV pili for the initial DNA uptake step. These proteinaceous cell-surface structures are composed of thousands of pilus subunits (pilins), designated as major or minor according to their relative abundance in the pilus. Here, we show that the minor pilin FimT plays an important role in the natural transformation of Legionella pneumophila. We use NMR spectroscopy, in vitro DNA binding assays and in vivo transformation assays to understand the molecular basis of FimT's role in this process. FimT binds to DNA via an electropositive patch, rich in arginines, several of which are well-conserved and located in a conformationally flexible C-terminal tail. FimT orthologues from other Gammaproteobacteria share the ability to bind to DNA. Our results suggest that FimT plays an important role in DNA uptake in a wide range of competent species.

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Organizational Affiliation: 
• Institute of Molecular Biology and Biophysics, ETH Zürich, Otto-Stern-Weg 5, Zürich, Switzerland.
Department of Microbiology, Monash University, 19 Innovation Walk, Clayton, 3800, Victoria, Australia.
Institute of Molecular Biology and Biophysics, ETH Zürich, Otto-Stern-Weg 5, Zürich, Switzerland. [e-mail].

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: NMR relaxation study

Macromolecule Content 

• Total Structure Weight: 14.38 kDa 
• Atom Count: 1,014 
• Modeled Residue Count: 125 
• Deposited Residue Count: 125 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Pilus assembly protein	A	125	Legionella pneumophila	Mutation(s): 0  Gene Names: C3927_06370

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2022-03-02 
Deposition Author(s): Braus, S.A.G., Hospenthal, M.K., Gossert, A.D.

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Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	PR00P3_179728

Revision History  

• Version 1.0: 2022-03-02
  Type: Initial release
  
• Version 1.1: 2022-03-16
  Changes: Database references
• Version 1.2: 2023-06-14
  Changes: Other
• Version 1.3: 2024-06-19
  Changes: Data collection, Database references