1U8T

Crystal structure of CheY D13K Y106W alone and in complex with a FliM peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the Constitutively Active Double Mutant CheY(D13K Y106W) Alone and in Complex with a FliM Peptide

Dyer, C.M.Quillin, M.L.Campos, A.Lu, J.McEvoy, M.M.Hausrath, A.C.Westbrook, E.M.Matsumura, P.Matthews, B.W.Dahlquist, F.W.

(2004) J.Mol.Biol. 342: 1325-1335

  • DOI: 10.1016/j.jmb.2004.07.084

  • PubMed Abstract: 
  • CheY is a member of the response regulator protein superfamily that controls the chemotactic swimming response of motile bacteria. The CheY double mutant D13K Y106W (CheY**) is resistant to phosphorylation, yet is a highly effective mimic of phosphor ...

    CheY is a member of the response regulator protein superfamily that controls the chemotactic swimming response of motile bacteria. The CheY double mutant D13K Y106W (CheY**) is resistant to phosphorylation, yet is a highly effective mimic of phosphorylated CheY in vivo and in vitro. The conformational attributes of this protein that enable it to signal in a phosphorylation-independent manner are unknown. We have solved the crystal structure of selenomethionine-substituted CheY** in the presence of its target, a peptide (FliM16) derived from the flagellar motor switch, FliM, to 1.5A resolution with an R-factor of 19.6%. The asymmetric unit contains four CheY** molecules, two with FliM16 bound, and two without. The two CheY** molecules in the asymmetric unit that are bound to FliM16 adopt a conformation similar to BeF3- -activated wild-type CheY, and also bind FliM16 in a nearly identical manner. The CheY** molecules that do not bind FliM16 are found in a conformation similar to unphosphorylated wild-type CheY, suggesting that the active phenotype of this mutant is enabled by a facile interconversion between the active and inactive conformations. Finally, we propose a ligand-binding model for CheY and CheY**, in which Ile95 changes conformation in a Tyr/Trp106-dependent manner to accommodate FliM.


    Organizational Affiliation

    Institute of Molecular Biology, University of Oregon, Eugene, OR 97403, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chemotaxis protein cheY
A, B, C, D
128Escherichia coli (strain K12)Mutation(s): 2 
Gene Names: cheY
Find proteins for P0AE67 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AE67
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Flagellar motor switch protein fliM
E, F
16Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fliM (cheC2, fla AII, fla QII)
Find proteins for P06974 (Escherichia coli (strain K12))
Go to UniProtKB:  P06974
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
C, D
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.196 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 54.280α = 60.36
b = 53.480β = 60.75
c = 54.100γ = 60.57
Software Package:
Software NamePurpose
TNTrefinement
SCALEPACKdata scaling
d*TREKdata scaling
SHARPphasing
d*TREKdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-10-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance