3J1R

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


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.5 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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

  • DOI: 10.1016/j.jmb.2012.05.031

  • 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 f ...

    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.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
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
26Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125)Mutation(s): 0 
Find proteins for A8AAA0 (Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125))
Go to UniProtKB:  A8AAA0
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.5 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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