4TUG

Crystal structure of MjMre11-DNA2 complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.55 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 

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Literature

DNA end recognition by the Mre11 nuclease dimer: insights into resection and repair of damaged DNA.

Sung, S., Li, F., Park, Y.B., Kim, J.S., Kim, A.K., Song, O.K., Kim, J., Che, J., Lee, S.E., Cho, Y.

(2014) EMBO J 33: 2422-2435

  • DOI: 10.15252/embj.201488299
  • Primary Citation of Related Structures:  
    4TUG, 4TUI

  • PubMed Abstract: 

    • The Mre11-Rad50-Nbs1 (MRN) complex plays important roles in sensing DNA damage, as well as in resecting and tethering DNA ends, and thus participates in double-strand break repair. An earlier structure of Mre11 bound to a short duplex DNA molecule suggested that each Mre11 in a dimer recognizes one DNA duplex to bridge two DNA ends at a short distance ...

    The Mre11-Rad50-Nbs1 (MRN) complex plays important roles in sensing DNA damage, as well as in resecting and tethering DNA ends, and thus participates in double-strand break repair. An earlier structure of Mre11 bound to a short duplex DNA molecule suggested that each Mre11 in a dimer recognizes one DNA duplex to bridge two DNA ends at a short distance. Here, we provide an alternative DNA recognition model based on the structures of Methanococcus jannaschii Mre11 (MjMre11) bound to longer DNA molecules, which may more accurately reflect a broken chromosome. An extended stretch of B-form DNA asymmetrically runs across the whole dimer, with each end of this DNA molecule being recognized by an individual Mre11 monomer. DNA binding induces rigid-body rotation of the Mre11 dimer, which could facilitate melting of the DNA end and its juxtaposition to an active site of Mre11. The identified Mre11 interface binding DNA duplex ends is structurally conserved and shown to functionally contribute to efficient resection, non-homologous end joining, and tolerance to DNA-damaging agents when other resection enzymes are absent. Together, the structural, biochemical, and genetic findings presented here offer new insights into how Mre11 recognizes damaged DNA and facilitates DNA repair.

    Organizational Affiliation: 

    Department of Life Sciences, Pohang University of Science and Technology, Pohang, South Korea lees4@uthscsa.edu yunje@postech.ac.kr.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA double-strand break repair protein Mre11337Methanocaldococcus jannaschii DSM 2661Mutation(s): 0 
Gene Names: mre11, MJ1323
EC: 3.1
UniProt
Find proteins for Q58719 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Explore Q58719 
Go to UniProtKB:  Q58719
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ58719
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*GP*CP*AP*CP*GP*TP*AP*GP*GP*AP*CP*AP*GP*C)-3')G14synthetic construct
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
DNA (5'-D(P*CP*TP*GP*TP*CP*CP*TP*AP*CP*GP*TP*GP*CP*CP*A)-3')H15synthetic construct
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.55 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.53α = 90
b = 185.624β = 99.86
c = 106.212γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-15
    Type: Initial release
  • Version 1.1: 2014-10-29
    Changes: Database references