Crystal Structure of Hypothetical Protein YihE from Escherichia coli

Experimental Data Snapshot

  • Resolution: 2.80 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 

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Crystal structure of a novel prokaryotic Ser/Thr kinase and its implication in the Cpx stress response pathway.

Zheng, J.He, C.Singh, V.K.Martin, N.L.Jia, Z.

(2007) Mol Microbiol 63: 1360-1371

  • DOI: https://doi.org/10.1111/j.1365-2958.2007.05611.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The Cpx signalling system of Escherichia coli and Salmonella enterica senses extracytoplasmic stress and controls expression of factors that allow the bacterium to adapt to these stressors and thereby enhance survival. Many of the Cpx-responsive genes products are of unknown function. We determined the crystal structure of one of these gene products, called YihE in E. coli, which exhibits a eukaryotic kinase fold. Functional assays established that both YihE and the S. enterica YihE homologue, RdoA, undergo autophosphorylation and phosphorylate protein substrates at Ser/Thr residues in vitro, demonstrating that YihE/RdoA is a novel Ser/Thr protein kinase in prokaryotic cells. Phenotypic analysis of yihE/rdoA null strains indicates that this kinase is most abundant in stationary phase, and is important for long-term cell survival and for expression of surface appendages in both a Cpx-independent and -dependent manner. YihE/RdoA is therefore a previously unknown kinase component of a new type of bacterial phosphorelay mechanism, adding kinase activity as another response to the Cpx sensing system that functions to maintain cellular homeostasis.

  • Organizational Affiliation

    Department of Biochemistry, Queen's University, Kingston, Ontario, K7L 3N6, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hypothetical protein yihE328Escherichia coliMutation(s): 0 
Find proteins for P0C0K3 (Escherichia coli (strain K12))
Explore P0C0K3 
Go to UniProtKB:  P0C0K3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C0K3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.215 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.974α = 90
b = 90.974β = 90
c = 110.42γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references