Crystal structure of heat shock regulator from Pyrococcus furiosus

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.255 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Crystal Structure of the Archaeal Heat Shock Regulator from Pyrococcus furiosus: A Molecular Chimera Representing Eukaryal and Bacterial Features.

Liu, W.Vierke, G.Wenke, A.K.Thomm, M.Ladenstein, R.

(2007) J Mol Biol 369: 474-488

  • DOI: https://doi.org/10.1016/j.jmb.2007.03.044
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    We report here the crystal structure of a protein from Pyrococcus furiosus (Phr) that represents the first characterized heat shock transcription factor in archaea. Phr specifically represses the expression of heat shock genes at physiological temperature in vitro and in vivo but is released from the promoters upon heat shock response. Structure analysis revealed a stable homodimer, each subunit consisting of an N-terminal winged helix DNA-binding domain (wH-DBD) and a C-terminal antiparallel coiled coil helical domain. The overall structure shows as a molecular chimera with significant folding similarity of its DBD to the bacterial SmtB/ArsR family, while its C-terminal part was found to be a remote homologue of the eukaryotic BAG domain. The dimeric protein recognizes a palindromic DNA sequence. Molecular docking and mutational analyses suggested a novel binding mode in which the major specific contacts occur at the minor groove interacting with the strongly basic wing containing a cluster of three arginine residues.

  • Organizational Affiliation

    Karolinska Institutet NOVUM, Center for Structural Biochemistry, 141 57 Huddinge, Sweden. wei.liu@biosci.ki.se

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Transcriptional regulatory protein arsR family
A, B
202Pyrococcus furiosusMutation(s): 0 
Gene Names: PF1790
Find proteins for Q8U030 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8U030 
Go to UniProtKB:  Q8U030
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8U030
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on SO4

Download Ideal Coordinates CCD File 
O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.305 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.255 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.389α = 90
b = 82.854β = 90
c = 114.492γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-27
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description