Biological Assembly 1  

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 21-mer - A21 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 56.92 kDa 
• Atom Count: 4,011 
• Modelled Residue Count: 546 
• Deposited Residue Count: 546 
• Unique protein chains: 1

 3J1R

Filaments from Ignicoccus hospitalis Show Diversity of Packing in Proteins Containing N-terminal Type IV Pilin Helices

• PDB DOI: 10.2210/pdb3J1R/pdb
• EM Map EMD-5423: EMDB EMDataResource

• Classification: CELL ADHESION, STRUCTURAL PROTEIN
• Organism(s): Ignicoccus hospitalis
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 2012-05-18 Released: 2012-06-20 
• Deposition Author(s): Yu, X., Goforth, C., Meyer, C., Rachel, R., Wirth, R., Schroeder, G.F., Egelman, E.H.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 7.50 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Filaments from Ignicoccus hospitalis Show Diversity of Packing in Proteins Containing N-Terminal Type IV Pilin Helices.

Yu, X., Goforth, C., Meyer, C., Rachel, R., Wirth, R., Schroder, G.F., Egelman, E.H.

(2012) J Mol Biol 422: 274-281

• PubMed: 22659006 
• DOI: 10.1016/j.jmb.2012.05.031
• Primary Citation of Related Structures:  
  3J1R


• PubMed Abstract: 
  

Bacterial motility is driven by the rotation of flagellar filaments that supercoil. The supercoiling involves the switching of coiled-coil protofilaments between two different states. In archaea, the flagellar filaments responsible for motility are formed by proteins with distinct homology in their N-terminal portion to bacterial Type IV pilins. The bacterial pilins have a single N-terminal hydrophobic α-helix, not the coiled coil found in flagellin. We have used electron cryo-microscopy to study the adhesion filaments from the archaeon Ignicoccus hospitalis. While I. hospitalis is non-motile, these filaments make transitions between rigid stretches and curved regions and appear morphologically similar to true archaeal flagellar filaments. A resolution of ~7.5Å allows us to unambiguously build a model for the packing of these N-terminal α-helices, and this packing is different from several bacterial Type IV pili whose structure has been analyzed by electron microscopy and modeling. Our results show that the mechanism responsible for the supercoiling of bacterial flagellar filaments cannot apply to archaeal filaments.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, VA 22908-0733, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
archaeal adhesion filament core	A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U	26	Ignicoccus hospitalis	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for A8AAA0 (Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125)) Explore A8AAA0  Go to UniProtKB:  A8AAA0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 7.50 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-06-20 
Deposition Author(s): Yu, X., Goforth, C., Meyer, C., Rachel, R., Wirth, R., Schroeder, G.F., Egelman, E.H.

Revision History  

• Version 1.0: 2012-06-20
  Type: Initial release
  
• Version 1.1: 2012-08-29
  Changes: Database references
• Version 1.2: 2018-07-18
  Changes: Author supporting evidence, Data collection