1ZWT | pdb_00001zwt

Structure of the globular head domain of the bundlin, BfpA, of the bundle-forming pilus of Enteropathogenic E.coli

• PDB DOI: https://doi.org/10.2210/pdb1ZWT/pdb
• BMRB: 6003

• Classification: CELL ADHESION
• Organism(s): Escherichia coli O127:H6
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2005-06-06 Released: 2005-10-04 
• Deposition Author(s): Ramboarina, S., Fernandes, P.J., Daniell, S., Islam, S., Frankel, G., Booy, F., Donnenberg, M.S., Matthews, S.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 12 
• Selection Criteria: structures with acceptable covalent geometry, structures with the least restraint violations, structures with the lowest energy 

Literature

Structure of the Bundle-forming Pilus from Enteropathogenic Escherichia coli

Ramboarina, S., Fernandes, P.J., Daniell, S., Islam, S., Simpson, P., Frankel, G., Booy, F., Donnenberg, M.S., Matthews, S.

(2005) J Biological Chem 280: 40252-40260

• PubMed: 16172128 
• DOI: https://doi.org/10.1074/jbc.M508099200
• Primary Citation Related Structures: 
  1ZWT


• PubMed Abstract: 
  

  Bundle-forming pili (BFP) are essential for the full virulence of enteropathogenic Escherichia coli (EPEC) because they are required for localized adherence to epithelial cells and auto-aggregation. We report the high resolution structure of bundlin, the monomer of BFP, solved by NMR. The structure reveals a new variation in the topology of type IVb pilins with significant differences in the composition and relative orientation of elements of secondary structure. In addition, the structural parameters of native BFP filaments were determined by electron microscopy after negative staining. The solution structure of bundlin was assembled according to these helical parameters to provide a plausible atomic resolution model for the BFP filament. We show that EPEC and Vibriocholerae type IVb pili display distinct differences in their monomer subunits consistent with data showing that bundlin and TcpA cannot complement each other, but assemble into filaments with similar helical organization.

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Organizational Affiliation: 
• Department of Biological Sciences, Wolfson Laboratory, Imperial College, London SW72AZ, United Kingdom.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 16.49 kDa 
• Atom Count: 1,154 
• Modeled Residue Count: 158 
• Deposited Residue Count: 158 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Major structural subunit of bundle-forming pilus	A	158	Escherichia coli O127:H6	Mutation(s): 0  Gene Names: bfpA
UniProt
Find proteins for P33553 (Escherichia coli O127:H6 (strain E2348/69 / EPEC)) Explore P33553  Go to UniProtKB:  P33553

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 12 
• Selection Criteria: structures with acceptable covalent geometry, structures with the least restraint violations, structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-10-04 
Deposition Author(s): Ramboarina, S., Fernandes, P.J., Daniell, S., Islam, S., Frankel, G., Booy, F., Donnenberg, M.S., Matthews, S.

Revision History  

• Version 1.0: 2005-10-04
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance
• Version 1.3: 2024-11-13
  Changes: Data collection, Database references, Structure summary