Structure of the ligand-free form of a bacterial DNA damage sensor protein

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.222 

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Structural Biochemistry of a Bacterial Checkpoint Protein Reveals Diadenylate Cyclase Activity Regulated by DNA Recombination Intermediates

Witte, G.Hartung, S.Buttner, K.Hopfner, K.P.

(2008) Mol Cell 30: 167-178

  • DOI: https://doi.org/10.1016/j.molcel.2008.02.020
  • Primary Citation of Related Structures:  
    3C1Y, 3C1Z, 3C21, 3C23

  • PubMed Abstract: 

    To reveal mechanisms of DNA damage checkpoint initiation, we structurally and biochemically analyzed DisA, a protein that controls a Bacillus subtilis sporulation checkpoint in response to DNA double-strand breaks. We find that DisA forms a large octamer that consists of an array of an uncharacterized type of nucleotide-binding domain along with two DNA-binding regions related to the Holliday junction recognition protein RuvA. Remarkably, the nucleotide-binding domains possess diadenylate cyclase activity. The resulting cyclic diadenosine phosphate, c-di-AMP, is reminiscent but distinct from c-di-GMP, an emerging prokaryotic regulator of complex cellular processes. Diadenylate cyclase activity is unaffected by linear DNA or DNA ends but strongly suppressed by branched nucleic acids such as Holliday junctions. Our data indicate that DisA signals DNA structures that interfere with chromosome segregation via c-di-AMP. Identification of the diadenylate cyclase domain in other eubacterial and archaeal proteins implies a more general role for c-di-AMP in prokaryotes.

  • Organizational Affiliation

    Munich Center for Advanced Photonics, Department of Chemistry and Biochemistry, Gene Center, Ludwig-Maximilians-University Munich, Feodor-Lynen-Strasse 25, D-81377 Munich, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA integrity scanning protein disA
A, B
377Thermotoga maritimaMutation(s): 0 
Find proteins for Q9WY43 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q9WY43 
Go to UniProtKB:  Q9WY43
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9WY43
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.222 
  • Space Group: P 4 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.93α = 90
b = 108.93β = 90
c = 166.47γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
MAR345data collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-05-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Advisory, Refinement description
  • Version 1.3: 2023-11-01
    Changes: Advisory, Data collection, Database references, Refinement description