Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction | Predict Membrane 

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17.92 kDa 
• Atom Count: 1455 
• Modelled Residue Count: 158 
• Deposited Residue Count: 158 
• Unique protein chains: 1

2HI2

Crystal structure of native Neisseria gonorrhoeae Type IV pilin at 2.3 Angstroms Resolution

• DOI: 10.2210/pdb2HI2/pdb

• Classification: CELL ADHESION
• Organism(s): Neisseria gonorrhoeae
• Mutation(s): No 
• Membrane Protein: Yes  MemProtMD


• Deposited: 2006-06-28 Released: 2006-09-12 
• Deposition Author(s): Craig, L., Arvai, A.S., Tainer, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.282 
• R-Value Work: 0.259 
• R-Value Observed: 0.259 

Literature

Type IV Pilus Structure by Cryo-Electron Microscopy and Crystallography: Implications for Pilus Assembly and Functions.

Craig, L., Volkmann, N., Arvai, A.S., Pique, M.E., Yeager, M., Egelman, E.H., Tainer, J.A.

(2006) Mol Cell 23: 651-662

• PubMed: 16949362 
• DOI: 10.1016/j.molcel.2006.07.004
• Primary Citation of Related Structures:  
  2HI2, 2HIL


• PubMed Abstract: 
  

Type IV pili (T4P) are long, thin, flexible filaments on bacteria that undergo assembly-disassembly from inner membrane pilin subunits and exhibit astonishing multifunctionality. Neisseria gonorrhoeae (gonococcal or GC) T4P are prototypic virulence factors and immune targets for increasingly antibiotic-resistant human pathogens, yet detailed structures are unavailable for any T4P. Here, we determined a detailed experimental GC-T4P structure by quantitative fitting of a 2.3 A full-length pilin crystal structure into a 12.5 A resolution native GC-T4P reconstruction solved by cryo-electron microscopy (cryo-EM) and iterative helical real space reconstruction. Spiraling three-helix bundles form the filament core, anchor the globular heads, and provide strength and flexibility. Protruding hypervariable loops and posttranslational modifications in the globular head shield conserved functional residues in pronounced grooves, creating a surprisingly corrugated pilus surface. These results clarify T4P multifunctionality and assembly-disassembly while suggesting unified assembly mechanisms for T4P, archaeal flagella, and type II secretion system filaments.

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Organizational Affiliation: 

Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Fimbrial protein	A	158	Neisseria gonorrhoeae	Mutation(s): 0  Gene Names: pilE1 Membrane Entity: Yes
UniProt
Find proteins for P02974 (Neisseria gonorrhoeae) Explore P02974  Go to UniProtKB:  P02974

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-galactopyranose-(1-3)-2,4-bisacetamido-2,4-dideoxy-beta-D-glucopyranose	B	2		N/A

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HTO	C [auth A]	HEPTANE-1,2,3-TRIOL C7 H16 O3 HXYCHJFUBNTKQR-RNFRBKRXSA-N
OPE	D [auth A]	PHOSPHORIC ACID MONO-(2-AMINO-ETHYL) ESTER C2 H8 N O4 P SUHOOTKUPISOBE-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MEA	A	L-PEPTIDE LINKING	C10 H13 N O2		PHE

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.282 
• R-Value Work: 0.259 
• R-Value Observed: 0.259 
• Space Group: C 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 119.754	α = 90
b = 124.941	β = 90
c = 26.848	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-06-28 
• Released Date: 2006-09-12 
Deposition Author(s): Craig, L., Arvai, A.S., Tainer, J.A.

Revision History  

• Version 1.0: 2006-09-12
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Structure summary