Crystal Structure of TTHA1359, a Transcriptional Regulator, CRP/FNR family from Thermus thermophilus HB8

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 

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Global gene expression mediated by Thermus thermophilus SdrP, a CRP/FNR family transcriptional regulator

Agari, Y.Kashihara, A.Yokoyama, S.Kuramitsu, S.Shinkai, A.

(2008) Mol Microbiol 70: 60-75

  • DOI: https://doi.org/10.1111/j.1365-2958.2008.06388.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Thermus thermophilus SdrP is one of four cyclic AMP receptor protein (CRP)/fumarate and nitrate reduction regulator (FNR) family proteins from the extremely thermophilic bacterium T. thermophilus HB8. Expression of sdrP mRNA increased in the stationary phase during cultivation at 70 degrees C. Although the sdrP gene was non-essential, an sdrP-deficient strain showed growth defects, particularly when grown in a synthetic medium, and increased sensitivity to disulphide stress. The expression of several genes was altered in the sdrP disruptant. Among them, we found eight SdrP-dependent promoters using in vitro transcription assays. A predicted SdrP binding site similar to that recognized by Escherichia coli CRP was found upstream of each SdrP-dependent promoter. In the wild-type strain, expression of these eight genes tended to increase upon entry into the stationary phase. Transcriptional activation in vitro was independent of any added effector molecule. The hypothesis that apo-SdrP is the active form of the protein was supported by the observation that the three-dimensional structure of apo-SdrP is similar to that of the DNA-binding form of E. coli CRP. Based on the properties of the SdrP-regulated genes found in this study, it is speculated that SdrP is involved in nutrient and energy supply, redox control, and polyadenylation of mRNA.

  • Organizational Affiliation

    RIKEN SPring-8 Center, Harima Institute, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcriptional regulator, FNR/CRP family202Thermus thermophilusMutation(s): 0 
Find proteins for Q5SIL0 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SIL0 
Go to UniProtKB:  Q5SIL0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SIL0
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.221 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.05α = 90
b = 54.05β = 90
c = 147.718γ = 90
Software Package:
Software NamePurpose
BSSdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-12-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance