6CHY

STRUCTURE OF CHEMOTAXIS PROTEIN CHEY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.33 Å
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of CheY mutants Y106W and T87I/Y106W. CheY activation correlates with movement of residue 106.

Zhu, X.Rebello, J.Matsumura, P.Volz, K.

(1997) J.Biol.Chem. 272: 5000-5006

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Position 106 in CheY is highly conserved as an aromatic residue in the response regulator superfamily. In the structure of the wild-type, apo-CheY, Tyr106 is a rotamer whose electron density is observed in both the inside and the outside positions. I ...

    Position 106 in CheY is highly conserved as an aromatic residue in the response regulator superfamily. In the structure of the wild-type, apo-CheY, Tyr106 is a rotamer whose electron density is observed in both the inside and the outside positions. In the structure of the T87I mutant of CheY, the threonine to isoleucine change at position 87 causes the side chain of Tyr106 to be exclusively restricted to the outside position. In this report we demonstrate that the T87I mutation causes cells to be smooth swimming and non-chemotactic. We also show that another CheY mutant, Y106W, causes cells to be more tumbly than wild-type CheY, and impairs chemotaxis. In the structure of Y106W, the side chain of Trp106 stays exclusively in the inside position. Furthermore, a T87I/Y106W double mutant, which confers the same phenotype as T87I, restricts the side chain of Trp106 to the outside position. The results from these behavioral and structural studies indicate that the rotameric nature of the Tyr106 residue is involved in activation of the CheY molecule. Specifically, CheY's signaling ability correlates with the conformational heterogeneity of the Tyr106 side chain. Our data also suggest that these mutations affect the signal at an event subsequent to phosphorylation.


    Related Citations: 
    • Crystal Structure of Escherichia Coli Chey Refined at 1.7-A Resolution
      Volz, K.,Matsumura, P.
      (1991) J.Biol.Chem. 266: 15511
    • Tyrosine 106 Plays an Important Role in Chemotaxis Signal Transduction in Escherichia Coli
      Zhu, X.,Amsler, C.D.,Volz, K.,Matsumura, P.
      (1996) J.Bacteriol. 178: 4208
    • Uncoupled Phosphorylation and Activation in Bacterial Chemotaxis. The 2.1-A Structure of a Threonine to Isoleucine Mutant at Position 87 of Chey
      Ganguli, S.,Wang, H.,Matsumura, P.,Volz, K.
      (1995) J.Biol.Chem. 270: 17386
    • Structural Conservation in the Chey Superfamily
      Volz, K.
      (1993) Biochemistry 32: 11741


    Organizational Affiliation

    Department of Microbiology and Immunology, University of Illinois, Chicago, Illinois 60612, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHEY
A, B
128Escherichia coli (strain K12)Mutation(s): 2 
Gene Names: cheY
Find proteins for P0AE67 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AE67
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.33 Å
  • R-Value Work: 0.185 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 95.780α = 90.00
b = 76.700β = 90.00
c = 32.640γ = 90.00
Software Package:
Software NamePurpose
MADNESdata scaling
MADNESdata reduction
PROFFTrefinement
MERLOTphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance