8BAH

Human Mre11-Nbs1 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cryo-EM structure of the Mre11-Rad50-Nbs1 complex reveals the molecular mechanism of scaffolding functions.

Rotheneder, M.Stakyte, K.van de Logt, E.Bartho, J.D.Lammens, K.Fan, Y.Alt, A.Kessler, B.Jung, C.Roos, W.P.Steigenberger, B.Hopfner, K.P.

(2023) Mol Cell 83: 167-185.e9

  • DOI: https://doi.org/10.1016/j.molcel.2022.12.003
  • Primary Citation of Related Structures:  
    7ZQY, 7ZR1, 8BAH

  • PubMed Abstract: 

    The DNA double-strand break repair complex Mre11-Rad50-Nbs1 (MRN) detects and nucleolytically processes DNA ends, activates the ATM kinase, and tethers DNA at break sites. How MRN can act both as nuclease and scaffold protein is not well understood. The cryo-EM structure of MRN from Chaetomium thermophilum reveals a 2:2:1 complex with a single Nbs1 wrapping around the autoinhibited Mre11 nuclease dimer. MRN has two DNA-binding modes, one ATP-dependent mode for loading onto DNA ends and one ATP-independent mode through Mre11's C terminus, suggesting how it may interact with DSBs and intact DNA. MRNs two 60-nm-long coiled-coil domains form a linear rod structure, the apex of which is assembled by the two joined zinc-hook motifs. Apices from two MRN complexes can further dimerize, forming 120-nm spanning MRN-MRN structures. Our results illustrate the architecture of MRN and suggest how it mechanistically integrates catalytic and tethering functions.


  • Organizational Affiliation

    Gene Center, Department of Biochemistry, Ludwig Maximilians Universität, Munich, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Double-strand break repair protein MRE11
A, B
738Homo sapiensMutation(s): 1 
Gene Names: MRE11HNGS1MRE11A
EC: 3.1
UniProt & NIH Common Fund Data Resources
Find proteins for P49959 (Homo sapiens)
Explore P49959 
Go to UniProtKB:  P49959
PHAROS:  P49959
GTEx:  ENSG00000020922 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49959
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Nibrin754Homo sapiensMutation(s): 0 
Gene Names: NBNNBSNBS1P95
UniProt & NIH Common Fund Data Resources
Find proteins for O60934 (Homo sapiens)
Explore O60934 
Go to UniProtKB:  O60934
PHAROS:  O60934
GTEx:  ENSG00000104320 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60934
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.13 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTCoot
MODEL REFINEMENTPHENIX
RECONSTRUCTIONcryoSPARC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyCRC1361
German Research Foundation (DFG)GermanySFB1361
German Research Foundation (DFG)GermanyGRK1721
German Research Foundation (DFG)GermanyCRC1054

Revision History  (Full details and data files)

  • Version 1.0: 2023-01-11
    Type: Initial release
  • Version 1.1: 2023-02-01
    Changes: Database references
  • Version 1.2: 2023-12-13
    Changes: Data collection