6C53 | pdb_00006c53

Cryo-EM structure of the Type 1 pilus rod

• PDB DOI: https://doi.org/10.2210/pdb6C53/pdb
• EM Map EMD-7342: EMDB EMDataResource

• Classification: PROTEIN FIBRIL
• Organism(s): Escherichia coli K-12
• Mutation(s): No 


• Deposited: 2018-01-13 Released: 2018-01-31 
• Deposition Author(s): Zheng, W., Wang, F., Luna-Rico, A., Francetic, O., Hultgren, S.J., Egelman, E.H.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.20 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Functional role of the type 1 pilus rod structure in mediating host-pathogen interactions.

Spaulding, C.N., Schreiber, H.L., Zheng, W., Dodson, K.W., Hazen, J.E., Conover, M.S., Wang, F., Svenmarker, P., Luna-Rico, A., Francetic, O., Andersson, M., Hultgren, S., Egelman, E.H.

(2018) Elife 7

• PubMed: 29345620 
• DOI: https://doi.org/10.7554/eLife.31662
• Primary Citation Related Structures: 
  6C53


• PubMed Abstract: 
  

  Uropathogenic E. coli (UPEC), which cause urinary tract infections (UTI), utilize type 1 pili, a chaperone usher pathway (CUP) pilus, to cause UTI and colonize the gut. The pilus rod, comprised of repeating FimA subunits, provides a structural scaffold for displaying the tip adhesin, FimH. We solved the 4.2 Å resolution structure of the type 1 pilus rod using cryo-electron microscopy. Residues forming the interactive surfaces that determine the mechanical properties of the rod were maintained by selection based on a global alignment of fimA sequences. We identified mutations that did not alter pilus production in vitro but reduced the force required to unwind the rod. UPEC expressing these mutant pili were significantly attenuated in bladder infection and intestinal colonization in mice. This study elucidates an unappreciated functional role for the molecular spring-like property of type 1 pilus rods in host-pathogen interactions and carries important implications for other pilus-mediated diseases.

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Organizational Affiliation: 
• Center for Women's Infectious Disease Research, Washington University School of Medicine, St. Louis, United States.
Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, United States.
Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, United States.
Department of Physics, Umeå University, Umeå, Sweden.
Department of Structural Biology and Chemistry, Institut Pasteur, Biochemistry of Macromolecular Interactions Unit, Paris, France.

Biological Assembly 1  

Global Symmetry: Helical - H  (Explore in 3D)
Global Stoichiometry: Homo 11-mer - A11 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: microscopy

Macromolecule Content 

• Total Structure Weight: 174.19 kDa 
• Atom Count: 12,023 
• Modeled Residue Count: 1,716 
• Deposited Residue Count: 1,749 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Type-1 fimbrial protein, A chain	A, B, C, D, E, F, G, H, I, J, K	159	Escherichia coli K-12	Mutation(s): 0
UniProt
Find proteins for P04128 (Escherichia coli (strain K12)) Explore P04128  Go to UniProtKB:  P04128

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.20 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX
MODEL REFINEMENT	Coot
RECONSTRUCTION	SPIDER

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2018-01-31 
Deposition Author(s): Zheng, W., Wang, F., Luna-Rico, A., Francetic, O., Hultgren, S.J., Egelman, E.H.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM122510

Revision History  

• Version 1.0: 2018-01-31
  Type: Initial release
  
• Version 1.1: 2019-12-18
  Changes: Author supporting evidence, Other
• Version 1.2: 2024-10-23
  Changes: Data collection, Database references, Structure summary