4I5S

Structure and function of sensor histidine kinase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Mechanistic insights revealed by the crystal structure of a histidine kinase with signal transducer and sensor domains

Wang, C.Sang, J.Wang, J.Su, M.Downey, J.S.Wu, Q.Wang, S.Cai, Y.Xu, X.Wu, J.Senadheera, D.B.Cvitkovitch, D.G.Chen, L.Goodman, S.D.Han, A.

(2013) Plos Biol. 11: e1001493-e1001493

  • DOI: 10.1371/journal.pbio.1001493

  • PubMed Abstract: 
  • Two-component systems (TCSs) are important for the adaptation and survival of bacteria and fungi under stress conditions. A TCS is often composed of a membrane-bound sensor histidine kinase (SK) and a response regulator (RR), which are relayed throug ...

    Two-component systems (TCSs) are important for the adaptation and survival of bacteria and fungi under stress conditions. A TCS is often composed of a membrane-bound sensor histidine kinase (SK) and a response regulator (RR), which are relayed through sequential phosphorylation steps. However, the mechanism for how an SK is switched on in response to environmental stimuli remains obscure. Here, we report the crystal structure of a complete cytoplasmic portion of an SK, VicK from Streptococcus mutans. The overall structure of VicK is a long-rod dimer that anchors four connected domains: HAMP, Per-ARNT-SIM (PAS), DHp, and catalytic and ATP binding domain (CA). The HAMP, a signal transducer, and the PAS domain, major sensor, adopt canonical folds with dyad symmetry. In contrast, the dimer of the DHp and CA domains is asymmetric because of different helical bends in the DHp domain and spatial positions of the CA domains. Moreover, a conserved proline, which is adjacent to the phosphoryl acceptor histidine, contributes to helical bending, which is essential for the autokinase and phosphatase activities. Together, the elegant architecture of VicK with a signal transducer and sensor domain suggests a model where DHp helical bending and a CA swing movement are likely coordinated for autokinase activation.


    Organizational Affiliation

    State Key Laboratory for Cellular Stress Biology, School of Life Sciences, Xiamen University, Xiangan, Xiamen, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative histidine kinase CovS; VicK-like protein
A, B
450Streptococcus mutans serotype c (strain ATCC 700610 / UA159)Gene Names: covS
Find proteins for Q8DT64 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Go to UniProtKB:  Q8DT64
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.230 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 153.124α = 90.00
b = 153.124β = 90.00
c = 125.113γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data scaling
PHENIXrefinement
HKL-2000data reduction
PHASESphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-11-28 
  • Released Date: 2013-03-27 
  • Deposition Author(s): Cai, Y.

Revision History 

  • Version 1.0: 2013-03-27
    Type: Initial release