5JEQ

Fragment of nitrate/nitrite sensor histidine kinase NarQ (R50K) in symmetric apo state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mechanism of transmembrane signaling by sensor histidine kinases.

Gushchin, I.Melnikov, I.Polovinkin, V.Ishchenko, A.Yuzhakova, A.Buslaev, P.Bourenkov, G.Grudinin, S.Round, E.Balandin, T.Borshchevskiy, V.Willbold, D.Leonard, G.Buldt, G.Popov, A.Gordeliy, V.

(2017) Science 356: --

  • DOI: 10.1126/science.aah6345
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • One of the major and essential classes of transmembrane (TM) receptors, present in all domains of life, is sensor histidine kinases, parts of two-component signaling systems (TCSs). The structural mechanisms of TM signaling by these sensors are poorl ...

    One of the major and essential classes of transmembrane (TM) receptors, present in all domains of life, is sensor histidine kinases, parts of two-component signaling systems (TCSs). The structural mechanisms of TM signaling by these sensors are poorly understood. We present crystal structures of the periplasmic sensor domain, the TM domain, and the cytoplasmic HAMP domain of the Escherichia coli nitrate/nitrite sensor histidine kinase NarQ in the ligand-bound and mutated ligand-free states. The structures reveal that the ligand binding induces rearrangements and pistonlike shifts of TM helices. The HAMP domain protomers undergo leverlike motions and convert these pistonlike motions into helical rotations. Our findings provide the structural framework for complete understanding of TM TCS signaling and for development of antimicrobial treatments targeting TCSs.


    Organizational Affiliation

    Institute of Complex Systems (ICS), ICS-6: Structural Biochemistry, Research Centre Jülich, 52425 Jülich, Germany. ivan.gushchin@phystech.edu valentin.gordeliy@ibs.fr.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nitrate/nitrite sensor protein NarQ
A
236Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: narQ
EC: 2.7.13.3
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Histidine Kinase Receptors
Protein: 
NarQ nitrate/nitrite sensor histidine kinase in symmetric holo state
Find proteins for P27896 (Escherichia coli (strain K12))
Go to UniProtKB:  P27896
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.285 
  • R-Value Work: 0.232 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 39.593α = 90.00
b = 59.366β = 90.00
c = 239.583γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
Aimlessdata scaling
MOLREPphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-05-31
    Type: Initial release
  • Version 1.1: 2017-06-21
    Type: Database references