7F6L

Crystal structure of human MUS81-EME2 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.229 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the human MUS81-EME2 complex.

Hua, Z.Fang, Q.Zhang, D.Luo, Z.Yuan, C.Lin, Z.

(2022) Structure 30: 743-752.e3

  • DOI: https://doi.org/10.1016/j.str.2022.02.015
  • Primary Citation of Related Structures:  
    7F6L

  • PubMed Abstract: 

    MUS81 is an important structure-specific endonuclease responsible for the processing of stalled replication forks and recombination intermediates. In human, MUS81 functions by forming complexes with its regulatory subunits EME1 and EME2, playing distinct roles in G2/M and S phases. Although the structures of MUS81-EME1 have been intensively studied, there is no structure information available about MUS81-EME2. Here, we report the crystal structure of MUS81-EME2, which reveals an overall protein fold similar to that of MUS81-EME1 complex. Further biochemical and structural characterization shows that the MUS81-EME1 and MUS81-EME2 complexes are identical in substrate recognition and endonuclease activities in vitro, implying that the distinct cellular roles of the two complexes could arise from temporal controls in cells. Finally, an extensive structure-guided mutagenesis analysis provides implications for the molecular basis of how the MUS81-EME endonucleases recognize various DNA substrates in a structure-selective manner.


  • Organizational Affiliation

    College of Chemistry, Fuzhou University, Fuzhou 350108, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Crossover junction endonuclease MUS81306Homo sapiensMutation(s): 0 
Gene Names: MUS81
EC: 3.1.22
UniProt & NIH Common Fund Data Resources
Find proteins for Q96NY9 (Homo sapiens)
Explore Q96NY9 
Go to UniProtKB:  Q96NY9
PHAROS:  Q96NY9
GTEx:  ENSG00000172732 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96NY9
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Probable crossover junction endonuclease EME2379Homo sapiensMutation(s): 0 
Gene Names: EME2
EC: 3.1.22
UniProt & NIH Common Fund Data Resources
Find proteins for A4GXA9 (Homo sapiens)
Explore A4GXA9 
Go to UniProtKB:  A4GXA9
PHAROS:  A4GXA9
GTEx:  ENSG00000197774 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA4GXA9
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.229 
  • Space Group: P 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.097α = 90
b = 93.097β = 90
c = 87.993γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
MOLREPphasing
Cootmodel building
PHENIXmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, China)China31971222

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-02
    Type: Initial release
  • Version 1.1: 2022-03-30
    Changes: Database references
  • Version 1.2: 2022-05-18
    Changes: Database references
  • Version 1.3: 2023-11-29
    Changes: Data collection, Refinement description