4ZBH

THE CRYSTAL STRUCTURE OF THE SOLUBLE DOMAIN OF SULFOLOBUS ACIDOCALDARIUS FLAF


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.158 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

FlaF Is a beta-Sandwich Protein that Anchors the Archaellum in the Archaeal Cell Envelope by Binding the S-Layer Protein.

Banerjee, A.Tsai, C.L.Chaudhury, P.Tripp, P.Arvai, A.S.Ishida, J.P.Tainer, J.A.Albers, S.V.

(2015) Structure 23: 863-872

  • DOI: 10.1016/j.str.2015.03.001
  • Primary Citation of Related Structures:  4P94

  • PubMed Abstract: 
  • Archaea employ the archaellum, a type IV pilus-like nanomachine, for swimming motility. In the crenarchaeon Sulfolobus acidocaldarius, the archaellum consists of seven proteins: FlaB/X/G/F/H/I/J. FlaF is conserved and essential for archaellum assembl ...

    Archaea employ the archaellum, a type IV pilus-like nanomachine, for swimming motility. In the crenarchaeon Sulfolobus acidocaldarius, the archaellum consists of seven proteins: FlaB/X/G/F/H/I/J. FlaF is conserved and essential for archaellum assembly but no FlaF structures exist. Here, we truncated the FlaF N terminus and solved 1.5-Å and 1.65-Å resolution crystal structures of this monotopic membrane protein. Structures revealed an N-terminal α-helix and an eight-strand β-sandwich, immunoglobulin-like fold with striking similarity to S-layer proteins. Crystal structures, X-ray scattering, and mutational analyses suggest dimer assembly is needed for in vivo function. The sole cell envelope component of S. acidocaldarius is a paracrystalline S-layer, and FlaF specifically bound to S-layer protein, suggesting that its interaction domain is located in the pseudoperiplasm with its N-terminal helix in the membrane. From these data, FlaF may act as the previously unknown archaellum stator protein that anchors the rotating archaellum to the archaeal cell envelope.


    Organizational Affiliation

    Molecular Biology of Archaea, Max Planck Institute for terrestrial Microbiology, Karl-von-Frisch-Strasse 10, 35043 Marburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Conserved flagellar protein F
A
146Sulfolobus acidocaldarius (strain ATCC 33909 / DSM 639 / JCM 8929 / NBRC 15157 / NCIMB 11770)N/A
Find proteins for Q4J9K8 (Sulfolobus acidocaldarius (strain ATCC 33909 / DSM 639 / JCM 8929 / NBRC 15157 / NCIMB 11770))
Go to UniProtKB:  Q4J9K8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.158 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 52.407α = 90.00
b = 52.407β = 90.00
c = 100.241γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXphasing
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-04-29
    Type: Initial release
  • Version 1.1: 2015-05-20
    Type: Database references
  • Version 1.2: 2017-11-01
    Type: Author supporting evidence, Database references, Derived calculations, Source and taxonomy