Escherichia coli EnvZ histidine kinase catalytic part fused to Archaeoglobus fulgidus Af1503 HAMP domain

Experimental Data Snapshot

  • Resolution: 2.85 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.259 

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This is version 1.3 of the entry. See complete history


Crystallographic Snapshot of the Escherichia Coli Envz Histidine Kinase in an Active Conformation.

Ferris, H.U.Coles, M.Lupas, A.N.Hartmann, M.D.

(2014) J Struct Biol 186: 376

  • DOI: https://doi.org/10.1016/j.jsb.2014.03.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Sensor histidine kinases are important sensors of the extracellular environment and relay signals via conformational changes that trigger autophosphorylation of the kinase and subsequent phosphorylation of a response regulator. The exact mechanism and the regulation of this protein family are a matter of ongoing investigation. Here we present a crystal structure of a functional chimeric protein encompassing the entire catalytic part of the Escherichia coli EnvZ histidine kinase, fused to the HAMP domain of the Archaeoglobus fulgidus Af1503 receptor. The construct is thus equivalent to the full cytosolic part of EnvZ. The structure shows a putatively active conformation of the catalytic domain and gives insight into how this conformation could be brought about in response to sensory input. Our analysis suggests a sequential flip-flop autokinase mechanism.

  • Organizational Affiliation

    Department of Protein Evolution, Max-Planck-Institute for Developmental Biology, D-72076 Tübingen, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D
273Archaeoglobus fulgidusEscherichia coli K-12
This entity is chimeric
Mutation(s): 1 
Find proteins for P0AEJ4 (Escherichia coli (strain K12))
Explore P0AEJ4 
Go to UniProtKB:  P0AEJ4
Find proteins for O28769 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16))
Explore O28769 
Go to UniProtKB:  O28769
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP0AEJ4O28769
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.85 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.258 
  • R-Value Observed: 0.259 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.06α = 90
b = 76.62β = 107.03
c = 97.37γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-09
    Type: Initial release
  • Version 1.1: 2014-06-11
    Changes: Database references
  • Version 1.2: 2017-03-15
    Changes: Source and taxonomy
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Other, Refinement description