6EKH

Crystal structure of activated CheY from Methanoccocus maripaludis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.654 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.284 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure and function of the archaeal response regulator CheY.

Quax, T.E.F.Altegoer, F.Rossi, F.Li, Z.Rodriguez-Franco, M.Kraus, F.Bange, G.Albers, S.V.

(2018) Proc. Natl. Acad. Sci. U.S.A. 115: E1259-E1268

  • DOI: 10.1073/pnas.1716661115
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Motility is a central feature of many microorganisms and provides an efficient strategy to respond to environmental changes. Bacteria and archaea have developed fundamentally different rotary motors enabling their motility, termed flagellum and archa ...

    Motility is a central feature of many microorganisms and provides an efficient strategy to respond to environmental changes. Bacteria and archaea have developed fundamentally different rotary motors enabling their motility, termed flagellum and archaellum, respectively. Bacterial motility along chemical gradients, called chemotaxis, critically relies on the response regulator CheY, which, when phosphorylated, inverses the rotational direction of the flagellum via a switch complex at the base of the motor. The structural difference between archaellum and flagellum and the presence of functional CheY in archaea raises the question of how the CheY protein changed to allow communication with the archaeal motility machinery. Here we show that archaeal CheY shares the overall structure and mechanism of magnesium-dependent phosphorylation with its bacterial counterpart. However, bacterial and archaeal CheY differ in the electrostatic potential of the helix α4. The helix α4 is important in bacteria for interaction with the flagellar switch complex, a structure that is absent in archaea. We demonstrated that phosphorylation-dependent activation, and conserved residues in the archaeal CheY helix α4, are important for interaction with the archaeal-specific adaptor protein CheF. This forms a bridge between the chemotaxis system and the archaeal motility machinery. Conclusively, archaeal CheY proteins conserved the central mechanistic features between bacteria and archaea, but differ in the helix α4 to allow binding to an archaellum-specific interaction partner.


    Organizational Affiliation

    Molecular Biology of Archaea, Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chemotaxis protein CheY
Y
123Methanococcus maripaludis (strain S2 / LL)Mutation(s): 0 
Gene Names: cheY
Find proteins for Q6LYQ5 (Methanococcus maripaludis (strain S2 / LL))
Go to UniProtKB:  Q6LYQ5
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
Y
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
BEF
Query on BEF

Download SDF File 
Download CCD File 
Y
BERYLLIUM TRIFLUORIDE ION
Be F3
OGIAHMCCNXDTIE-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.654 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.284 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 71.332α = 90.00
b = 71.332β = 90.00
c = 77.115γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-01-31
    Type: Initial release
  • Version 1.1: 2018-02-14
    Type: Data collection
  • Version 1.2: 2018-02-21
    Type: Database references
  • Version 1.3: 2019-02-20
    Type: Advisory, Data collection, Derived calculations