Crystal structure of a covalently fused Nbs1-Mre11 complex with one manganese ion per active site

Experimental Data Snapshot

  • Resolution: 2.38 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.223 

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Structure of Mre11-Nbs1 complex yields insights into ataxia-telangiectasia-like disease mutations and DNA damage signaling.

Schiller, C.B.Lammens, K.Guerini, I.Coordes, B.Feldmann, H.Schlauderer, F.Mockel, C.Schele, A.Strasser, K.Jackson, S.P.Hopfner, K.P.

(2012) Nat Struct Mol Biol 19: 693-700

  • DOI: https://doi.org/10.1038/nsmb.2323
  • Primary Citation of Related Structures:  
    4FBK, 4FBQ, 4FBW, 4FCX

  • PubMed Abstract: 

    The Mre11-Rad50-Nbs1 (MRN) complex tethers, processes and signals DNA double-strand breaks, promoting genomic stability. To understand the functional architecture of MRN, we determined the crystal structures of the Schizosaccharomyces pombe Mre11 dimeric catalytic domain alone and in complex with a fragment of Nbs1. Two Nbs1 subunits stretch around the outside of the nuclease domains of Mre11, with one subunit additionally bridging and locking the Mre11 dimer via a highly conserved asymmetrical binding motif. Our results show that Mre11 forms a flexible dimer and suggest that Nbs1 not only is a checkpoint adaptor but also functionally influences Mre11-Rad50. Clinical mutations in Mre11 are located along the Nbs1-interaction sites and weaken the Mre11-Nbs1 interaction. However, they differentially affect DNA repair and telomere maintenance in Saccharomyces cerevisiae, potentially providing insight into their different human disease pathologies.

  • Organizational Affiliation

    Gene Center, Ludwig Maximilians University Munich, Munich, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA repair and telomere maintenance protein nbs1,DNA repair protein rad32 CHIMERIC PROTEIN
A, B
472Schizosaccharomyces pombeMutation(s): 0 
Find proteins for Q09683 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore Q09683 
Go to UniProtKB:  Q09683
Find proteins for O43070 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore O43070 
Go to UniProtKB:  O43070
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ09683O43070
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.38 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.261α = 90
b = 78.872β = 90
c = 222.678γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-06-20
    Type: Initial release
  • Version 1.1: 2012-07-25
    Changes: Database references
  • Version 1.2: 2017-07-26
    Changes: Advisory, Refinement description, Source and taxonomy
  • Version 1.3: 2017-11-15
    Changes: Refinement description
  • Version 1.4: 2024-02-28
    Changes: Advisory, Data collection, Database references, Derived calculations