Novel dimerization motif in the DEAD box RNA helicase Hera form 2, complete dimer, symmetric

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 

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This is version 1.4 of the entry. See complete history


A novel dimerization motif in the C-terminal domain of the Thermus thermophilus DEAD box helicase Hera confers substantial flexibility.

Klostermeier, D.Rudolph, M.G.

(2009) Nucleic Acids Res 37: 421-430

  • DOI: https://doi.org/10.1093/nar/gkn947
  • Primary Citation of Related Structures:  
    3EAQ, 3EAR, 3EAS

  • PubMed Abstract: 

    DEAD box helicases are involved in nearly all aspects of RNA metabolism. They share a common helicase core, and may comprise additional domains that contribute to RNA binding. The Thermus thermophilus helicase Hera is the first dimeric DEAD box helicase. Crystal structures of Hera fragments reveal a bipartite C-terminal domain with a novel dimerization motif and an RNA-binding module. We provide a first glimpse on the additional RNA-binding module outside the Hera helicase core. The dimerization and RNA-binding domains are connected to the C-terminal RecA domain by a hinge region that confers exceptional flexibility onto the helicase, allowing for different juxtapositions of the RecA-domains in the dimer. Combination of the previously determined N-terminal Hera structure with the C-terminal Hera structures allows generation of a model for the entire Hera dimer, where two helicase cores can work in conjunction on large RNA substrates.

  • Organizational Affiliation

    Division of Biophysical Chemistry, Biozentrum, University of Basel, CH-4056 Basel, Switzerland. dagmar.klostermeier@unibas.ch

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Heat resistant RNA dependent ATPase
A, B
212Thermus thermophilus HB27Mutation(s): 0 
Gene Names: TT_C1895
Find proteins for Q72GF3 (Thermus thermophilus (strain ATCC BAA-163 / DSM 7039 / HB27))
Explore Q72GF3 
Go to UniProtKB:  Q72GF3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ72GF3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.62α = 90
b = 70.78β = 90
c = 101.91γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SADABSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-12-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-04-03
    Changes: Refinement description