4FMT

Crystal structure of a ChpT protein (CC_3470) from Caulobacter crescentus CB15 at 2.30 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Branched signal wiring of an essential bacterial cell-cycle phosphotransfer protein.

Blair, J.A.Xu, Q.Childers, W.S.Mathews, I.I.Kern, J.W.Eckart, M.Deacon, A.M.Shapiro, L.

(2013) Structure 21: 1590-1601

  • DOI: 10.1016/j.str.2013.06.024

  • PubMed Abstract: 
  • Vital to bacterial survival is the faithful propagation of cellular signals, and in Caulobacter crescentus, ChpT is an essential mediator within the cell-cycle circuit. ChpT functions as a histidine-containing phosphotransfer protein (HPt) that shutt ...

    Vital to bacterial survival is the faithful propagation of cellular signals, and in Caulobacter crescentus, ChpT is an essential mediator within the cell-cycle circuit. ChpT functions as a histidine-containing phosphotransfer protein (HPt) that shuttles a phosphoryl group from the receiver domain of CckA, the upstream hybrid histidine kinase (HK), to one of two downstream response regulators (CtrA or CpdR) that controls cell-cycle progression. To understand how ChpT interacts with multiple signaling partners, we solved the crystal structure of ChpT at 2.3 Å resolution. ChpT adopts a pseudo-HK architecture but does not bind ATP. We identified two point mutation classes affecting phosphotransfer and cell morphology: one that globally impairs ChpT phosphotransfer, and a second that mediates partner selection. Importantly, a small set of conserved ChpT residues promotes signaling crosstalk and contributes to the branched signaling that activates the master regulator CtrA while inactivating the CtrA degradation signal, CpdR.


    Organizational Affiliation

    Department of Developmental Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ChpT protein
A, B, C, D
228Caulobacter crescentus (strain ATCC 19089 / CB15)N/A
Find proteins for Q9A2T6 (Caulobacter crescentus (strain ATCC 19089 / CB15))
Go to UniProtKB:  Q9A2T6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A, B, C, D
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 65.190α = 90.00
b = 94.320β = 92.26
c = 100.610γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
SHELXphasing
XSCALEdata scaling
PDB_EXTRACTdata extraction
BUSTER-TNTrefinement
BUSTERrefinement
MolProbitymodel building
SHARPphasing
SHELXDphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-25
    Type: Initial release
  • Version 1.1: 2014-09-24
    Type: Database references
  • Version 1.2: 2017-11-15
    Type: Refinement description
  • Version 1.3: 2018-01-24
    Type: Structure summary