1OQW

Full-Length PAK Pilin from Pseudomonas aeruginosa

• PDB DOI: https://doi.org/10.2210/pdb1OQW/pdb

• Classification: CELL ADHESION
• Organism(s): Pseudomonas aeruginosa
• Mutation(s): No 
• Membrane Protein: Yes  OPMMemProtMD


• Deposited: 2003-03-11 Released: 2003-06-03 
• Deposition Author(s): Craig, L., Arvai, A.S., Forest, K.T., Tainer, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.248 
• R-Value Work: 0.223 
• R-Value Observed: 0.225 

Starting Model: experimental

Literature

Type IV Pilin Structure and Assembly: X-Ray and EM Analyses of Vibrio cholerae Toxin-Coregulated Pilus and Pseudomonas aeruginosa PAK Pilin

Craig, L., Taylor, R.K., Pique, M.E., Adair, B.A., Arvai, A.S., Singh, M., Lloyd, S.J., Shin, D.S., Getzoff, E.D., Yeager, M., Forest, K.T., Tainer, J.A.

(2003) Mol Cell 11: 1139-1150

• PubMed: 12769840 
• DOI: https://doi.org/10.1016/s1097-2765(03)00170-9
• Primary Citation of Related Structures:  
  1OQV, 1OQW


• PubMed Abstract: 
  

  Pilin assembly into type IV pili is required for virulence by bacterial pathogens that cause diseases such as cholera, pneumonia, gonorrhea, and meningitis. Crystal structures of soluble, N-terminally truncated pilin from Vibrio cholera toxin-coregulated pilus (TCP) and full-length PAK pilin from Pseudomonas aeruginosa reveal a novel TCP fold, yet a shared architecture for the type IV pilins. In each pilin subunit a conserved, extended, N-terminal alpha helix wrapped by beta strands anchors the structurally variable globular head. Inside the assembled pilus, characterized by cryo-electron microscopy and crystallography, the extended hydrophobic alpha helices make multisubunit contacts to provide mechanical strength and flexibility. Outside, distinct interactions of adaptable heads contribute surface variation for specificity of pilus function in antigenicity, motility, adhesion, and colony formation.

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Organizational Affiliation: 

Department of Molecular Biology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 30.04 kDa 
• Atom Count: 2,392 
• Modelled Residue Count: 288 
• Deposited Residue Count: 288 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fimbrial protein	A, B	144	Pseudomonas aeruginosa	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P02973 (Pseudomonas aeruginosa) Explore P02973  Go to UniProtKB:  P02973

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.248 
• R-Value Work: 0.223 
• R-Value Observed: 0.225 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 147.015	α = 90
b = 44.422	β = 116.82
c = 73.782	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-06-03 
Deposition Author(s): Craig, L., Arvai, A.S., Forest, K.T., Tainer, J.A.

Revision History  

• Version 1.0: 2003-06-03
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-16
  Changes: Data collection, Database references, Refinement description
• Version 1.4: 2024-10-30
  Changes: Structure summary