Crystal structure of S. typhimurium H-NS 1-83

Experimental Data Snapshot

  • Resolution: 3.70 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.274 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


H-NS forms a superhelical protein scaffold for DNA condensation.

Arold, S.T.Leonard, P.G.Parkinson, G.N.Ladbury, J.E.

(2010) Proc Natl Acad Sci U S A 107: 15728-15732

  • DOI: https://doi.org/10.1073/pnas.1006966107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The histone-like nucleoid structuring (H-NS) protein plays a fundamental role in DNA condensation and is a key regulator of enterobacterial gene expression in response to changes in osmolarity, pH, and temperature. The protein is capable of high-order self-association via interactions of its oligomerization domain. Using crystallography, we have solved the structure of this complete domain in an oligomerized state. The observed superhelical structure establishes a mechanism for the self-association of H-NS via both an N-terminal antiparallel coiled-coil and a second, hitherto unidentified, helix-turn-helix dimerization interface at the C-terminal end of the oligomerization domain. The helical scaffold suggests the formation of a H-NS:plectonemic DNA nucleoprotein complex that is capable of explaining published biophysical and functional data, and establishes a unifying structural basis for coordinating the DNA packaging and transcription repression functions of H-NS.

  • Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Texas, M. D. Anderson Cancer Center, Houston, 77030, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-binding protein H-NS
A, B
86Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 1 
Gene Names: H-NShnshnsAosmZSTM1751
Find proteins for P0A1S2 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P0A1S2 
Go to UniProtKB:  P0A1S2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A1S2
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.70 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.274 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 130.397α = 90
b = 130.397β = 90
c = 55.061γ = 120
Software Package:
Software NamePurpose
CrystalCleardata collection
d*TREKdata reduction
d*TREKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-09-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Refinement description