Crystal Structure of beta hordothionin

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.172 

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This is version 1.5 of the entry. See complete history


Crystal structure of alpha-hordothionin at 1.9 Angstrom resolution.

Johnson, K.A.Kim, E.Teeter, M.M.Suh, S.W.Stec, B.

(2005) FEBS Lett 579: 2301-2306

  • DOI: https://doi.org/10.1016/j.febslet.2004.12.100
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Crystal structure of ubiquitous toxin from barley alpha-hordothionin (alpha-HT) has been determined at 1.9A resolution by X-ray crystallography. The primary sequence as well as the NMR solution structure of alpha-HT firmly established that alpha-HT belongs to a family of membrane active plant toxins-thionins. Since alpha-HT crystallized in a space group (P4(1)2(1)2) that is different from the space group (I422) of previously determined alpha(1)- and beta-purothionins, and visocotoxin A3, therefore, it provided independent information on protein-protein interactions that may be relevant to the toxin mechanism. The structure of alpha-HT not only confirms overall architectural features (crambin fold) but also provides an additional confirmation of the role for crucial solute molecules, that were postulated to be directly involved in the mechanism of toxicity for thionins.

  • Organizational Affiliation

    Department of Chemistry, University of Texas at El Paso, 79968, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
45Hordeum vulgareMutation(s): 0 
Membrane Entity: Yes 
Find proteins for P21742 (Hordeum vulgare)
Explore P21742 
Go to UniProtKB:  P21742
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21742
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.172 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.66α = 90
b = 68.66β = 90
c = 47.47γ = 90
Software Package:
Software NamePurpose
MADNESSdata collection
SCALEPACKdata scaling
MADNESSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-01-11
    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: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2021-08-04
    Changes: Derived calculations, Refinement description
  • Version 1.5: 2023-10-25
    Changes: Data collection, Database references, Refinement description