4BIX

Crystal structure of CpxAHDC (monoclinic form 1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Segmental Helical Motions and Dynamical Asymmetry Modulate Histidine Kinase Autophosphorylation.

Mechaly, A.E.Sassoon, N.Betton, J.M.Alzari, P.M.

(2014) Plos Biol. 12: 1776

  • DOI: 10.1371/journal.pbio.1001776
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Histidine kinases (HKs) are dimeric receptors that participate in most adaptive responses to environmental changes in prokaryotes. Although it is well established that stimulus perception triggers autophosphorylation in many HKs, little is known on h ...

    Histidine kinases (HKs) are dimeric receptors that participate in most adaptive responses to environmental changes in prokaryotes. Although it is well established that stimulus perception triggers autophosphorylation in many HKs, little is known on how the input signal propagates through the HAMP domain to control the transient interaction between the histidine-containing and ATP-binding domains during the catalytic reaction. Here we report crystal structures of the full cytoplasmic region of CpxA, a prototypical HK involved in Escherichia coli response to envelope stress. The structural ensemble, which includes the Michaelis complex, unveils HK activation as a highly dynamic process, in which HAMP modulates the segmental mobility of the central HK α-helices to promote a strong conformational and dynamical asymmetry that characterizes the kinase-active state. A mechanical model based on our structural and biochemical data provides insights into HAMP-mediated signal transduction, the autophosphorylation reaction mechanism, and the symmetry-dependent control of HK kinase/phosphatase functional states.


    Organizational Affiliation

    Institut Pasteur, Unité de Microbiologie Structurale and CNRS UMR 3528, Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SENSOR PROTEIN CPXA
A, B
298Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: cpxA (ecfB, eup, ssd)
EC: 2.7.13.3
Find proteins for P0AE82 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AE82
Small Molecules
Ligands 3 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
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.195 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 95.186α = 90.00
b = 141.800β = 94.33
c = 55.214γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
Aimlessdata scaling
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-02-12
    Type: Initial release