6AZR

Crystal structure of the T264A HK853cp-BeF3-RR468 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.628 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

A pH-gated conformational switch regulates the phosphatase activity of bifunctional HisKA-family histidine kinases.

Liu, Y.Rose, J.Huang, S.Hu, Y.Wu, Q.Wang, D.Li, C.Liu, M.Zhou, P.Jiang, L.

(2017) Nat Commun 8: 2104-2104

  • DOI: 10.1038/s41467-017-02310-9
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Histidine kinases are key regulators in the bacterial two-component systems that mediate the cellular response to environmental changes. The vast majority of the sensor histidine kinases belong to the bifunctional HisKA family, displaying both kinase ...

    Histidine kinases are key regulators in the bacterial two-component systems that mediate the cellular response to environmental changes. The vast majority of the sensor histidine kinases belong to the bifunctional HisKA family, displaying both kinase and phosphatase activities toward their substrates. The molecular mechanisms regulating the opposing activities of these enzymes are not well understood. Through a combined NMR and crystallographic study on the histidine kinase HK853 and its response regulator RR468 from Thermotoga maritima, here we report a pH-mediated conformational switch of HK853 that shuts off its phosphatase activity under acidic conditions. Such a pH-sensing mechanism is further demonstrated in the EnvZ-OmpR two-component system from Salmonella enterica in vitro and in vivo, which directly contributes to the bacterial infectivity. Our finding reveals a broadly conserved mechanism that regulates the phosphatase activity of the largest family of bifunctional histidine kinases in response to the change of environmental pH.


    Organizational Affiliation

    Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sensor histidine kinase
A, C
259Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)Mutation(s): 1 
Find proteins for Q9WZV7 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Go to UniProtKB:  Q9WZV7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Chemotaxis regulator-transmits chemoreceptor signals to flagelllar motor components CheY
B, D
123Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)Mutation(s): 0 
Find proteins for Q9WYT9 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Go to UniProtKB:  Q9WYT9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download SDF File 
Download CCD File 
A, C
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
B, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
BFD
Query on BFD
B, D
L-PEPTIDE LINKINGC4 H6 Be F3 N O4ASP
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.628 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.208 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 178.458α = 90.00
b = 98.336β = 109.80
c = 71.458γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2017-09-11 
  • Released Date: 2017-12-27 
  • Deposition Author(s): Rose, J., Zhou, P.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesGM115355

Revision History 

  • Version 1.0: 2017-12-27
    Type: Initial release