1FFS

CHEY-BINDING DOMAIN OF CHEA IN COMPLEX WITH CHEY FROM CRYSTALS SOAKED IN ACETYL PHOSPHATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Further insights into the mechanism of function of the response regulator CheY from crystallographic studies of the CheY--CheA(124--257) complex.

Gouet, P.Chinardet, N.Welch, M.Guillet, V.Cabantous, S.Birck, C.Mourey, L.Samama, J.P.

(2001) Acta Crystallogr.,Sect.D 57: 44-51

  • Primary Citation of Related Structures:  1FFG, 1FFW

  • PubMed Abstract: 
  • New crystallographic structures of the response regulator CheY in association with CheA(124--257), its binding domain in the kinase CheA, have been determined. In all crystal forms, the molecular interactions at the heterodimer interface are identica ...

    New crystallographic structures of the response regulator CheY in association with CheA(124--257), its binding domain in the kinase CheA, have been determined. In all crystal forms, the molecular interactions at the heterodimer interface are identical. Soaking experiments have been performed on the crystals using acetyl phosphate as phosphodonor to CheY. No phosphoryl group attached to Asp57 of CheY is visible from the electron density, but the response regulator in the CheY-CheA(124--257) complex may have undergone a phosphorylation-dephosphorylation process. The distribution of water molecules and the geometry of the active site have changed and are now similar to those of isolated CheY. In a second soaking experiment, imido-diphosphate, an inhibitor of the phosphorylation reaction, was used. This compound binds in the vicinity of the active site, close to the N-terminal part of the first alpha-helix. Together, these results suggest that the binding of CheY to CheA(124--257) generates a geometry of the active site that favours phosphorylation and that imido-diphosphate interferes with phosphorylation by precluding structural changes in this region.


    Related Citations: 
    • Structure of the CheY-binding domain of histidine kinase CheA in complex with CheY.
      WELCH, M.,CHINARDET, N.,MOUREY, L.,BIRCK, C.,SAMAMA, J.-P.
      (1998) Nat.Struct.Mol.Biol. 5: 25


    Organizational Affiliation

    Groupe de Cristallographie Biologique, IPBS-CNRS, 205 Route de Narbonne, 31077 Toulouse CEDEX, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHEMOTAXIS PROTEIN CHEY
A, C
128Escherichia coli (strain K12)Gene Names: cheY
Find proteins for P0AE67 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AE67
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CHEMOTAXIS PROTEIN CHEA
B, D
134Escherichia coli (strain K12)Gene Names: cheA
EC: 2.7.13.3
Find proteins for P07363 (Escherichia coli (strain K12))
Go to UniProtKB:  P07363
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A, C
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 159.300α = 90.00
b = 53.400β = 90.00
c = 77.800γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-01-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance