3FGZ

Crystal Structure of CheY triple mutant F14E, N59M, E89R complexed with BeF3- and Mn2+


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Matching Biochemical Reaction Kinetics to the Timescales of Life: Structural Determinants That Influence the Autodephosphorylation Rate of Response Regulator Proteins.

Pazy, Y.Wollish, A.C.Thomas, S.A.Miller, P.J.Collins, E.J.Bourret, R.B.Silversmith, R.E.

(2009) J Mol Biol 392: 1205-1220

  • DOI: https://doi.org/10.1016/j.jmb.2009.07.064
  • Primary Citation of Related Structures:  
    3F7N, 3FFT, 3FFW, 3FFX, 3FGZ

  • PubMed Abstract: 

    In two-component regulatory systems, covalent phosphorylation typically activates the response regulator signaling protein, and hydrolysis of the phosphoryl group reestablishes the inactive state. Despite highly conserved three-dimensional structures and active-site features, the rates of catalytic autodephosphorylation for different response regulators vary by a factor of almost 10(6). Previous studies identified two variable active-site residues, corresponding to Escherichia coli CheY residues 59 and 89, that modulate response regulator autodephosphorylation rates about 100-fold. Here, a set of five CheY mutants, which match other "model" response regulators (ArcA, CusR, DctD, FixJ, PhoB, or Spo0F) at variable active-site positions corresponding to CheY residues 14, 59, and 89, were characterized functionally and structurally in an attempt to identify mechanisms that modulate autodephosphorylation rate. As expected, the autodephosphorylation rates of the CheY mutants were reduced 6- to 40-fold relative to wild-type CheY, but all still autodephosphorylated 12- to 80-fold faster than their respective model response regulators. Comparison of X-ray crystal structures of the five CheY mutants (complexed with the phosphoryl group analogue BeF(3)(-)) to wild-type CheY or corresponding model response regulator structures gave strong evidence for steric obstruction of the phosphoryl group from the attacking water molecule as one mechanism to enhance phosphoryl group stability. Structural data also suggested that impeding the change of a response regulator from the active to the inactive conformation might retard the autodephosphorylation reaction if the two processes are coupled, and that the residue at position '58' may contribute to rate modulation. A given combination of amino acids at positions '14', '59', and '89' adopted similar conformations regardless of protein context (CheY or model response regulator), suggesting that knowledge of residue identity may be sufficient to predict autodephosphorylation rate, and hence the kinetics of the signaling response, in the response regulator family of proteins.


  • Organizational Affiliation

    Department of Microbiology and Immunology, University of North Carolina, Chapel Hill, NC 27599-7290, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chemotaxis protein cheY
A, B
128Escherichia coli K-12Mutation(s): 3 
Gene Names: b1882cheYJW1871
UniProt
Find proteins for P0AE67 (Escherichia coli (strain K12))
Explore P0AE67 
Go to UniProtKB:  P0AE67
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0AE67
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
BEF
Query on BEF

Download Ideal Coordinates CCD File 
D [auth A],
G [auth B]
BERYLLIUM TRIFLUORIDE ION
Be F3
OGIAHMCCNXDTIE-UHFFFAOYSA-K
MN
Query on MN

Download Ideal Coordinates CCD File 
C [auth A],
F [auth B]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
NH4
Query on NH4

Download Ideal Coordinates CCD File 
I [auth B]AMMONIUM ION
H4 N
QGZKDVFQNNGYKY-UHFFFAOYSA-O
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.534α = 90
b = 53.485β = 90
c = 161.853γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-09-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2018-10-03
    Changes: Data collection
  • Version 1.4: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 1.5: 2023-09-06
    Changes: Data collection, Refinement description