3OTT

Crystal Structure of the extracellular domain of the putative one component system BT4673 from B. thetaiotaomicron

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal structures of apparent saccharide sensors from histidine kinase receptors prevalent in a human gut symbiont.

Zhang, Z., Liu, Q., Hendrickson, W.A.

(2014) FEBS J 281: 4263-4279

  • DOI: 10.1111/febs.12904
  • Primary Citation of Related Structures:  
    3V9F, 3OTT

  • PubMed Abstract: 

    • The adult human gut is a complicated ecosystem in which host-bacterium symbiosis plays an important role. Bacteroides thetaiotaomicron is a predominant member of the gut microflora, providing the human digestive tract with a large number of glycolytic enzymes ...

    The adult human gut is a complicated ecosystem in which host-bacterium symbiosis plays an important role. Bacteroides thetaiotaomicron is a predominant member of the gut microflora, providing the human digestive tract with a large number of glycolytic enzymes. Expression of many of these enzymes appears to be controlled by histidine kinase receptors that are fused into unusual hybrid two-component systems that share homologous periplasmic sensor domains. These sensor domains belong to the third most populated (HK3) family based on a previous unpublished bioinformatics analysis of predicted histidine kinase sensors. Here, we present the crystal structures of two sensor domains representative of the HK3 family. Each sensor is folded into three domains: two-seven-bladed β-propeller domains and one β-sandwich domain. Both sensors form dimers in crystals, and one sensor appears to be physiologically relevant. The folding characteristics in the individual domains, the domain organization, and the oligomeric architecture are all unique to HK3 sensors. Sequence analysis of the HK3 sensors indicates that these sensor domains are shared among other signaling molecules, implying combinatorial molecular evolution.

    Related Citations: 
    • Multi-crystal Anomalous Diffraction for Low Resolution Macromolecular Phasing
      () To be published --: --
    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Two-component system sensor histidine kinaseA, B758Bacteroides thetaiotaomicronMutation(s): 0 
Gene Names: BT_4673
Find proteins for Q89YQ8 (Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / NCTC 10582 / E50 / VPI-5482))
Explore Q89YQ8 
Go to UniProtKB:  Q89YQ8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TBR
Query on TBR
Download Ideal Coordinates CCD File 
 C [auth A], D [auth B]HEXATANTALUM DODECABROMIDE
Br12 Ta6
YWYIQTPPCOBSGN-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.173α = 90
b = 88.173β = 90
c = 432.956γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
SHELXSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-10
    Type: Initial release
  • Version 1.1: 2014-07-23
    Changes: Database references
  • Version 1.2: 2014-10-01
    Changes: Database references