4NE3

Human MHF1-MHF2 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8007 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The MHF complex senses branched DNA by binding a pair of crossover DNA duplexes.

Zhao, Q.Saro, D.Sachpatzidis, A.Singh, T.R.Schlingman, D.Zheng, X.F.Mack, A.Tsai, M.S.Mochrie, S.Regan, L.Meetei, A.R.Sung, P.Xiong, Y.

(2014) Nat Commun 5: 2987-2987

  • DOI: 10.1038/ncomms3987
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The conserved MHF1-MHF2 (MHF) complex functions in the activation of the Fanconi anaemia pathway of the DNA damage response, in regulating homologous recombination, and in DNA replication fork maintenance. MHF facilitates the processing of multiple t ...

    The conserved MHF1-MHF2 (MHF) complex functions in the activation of the Fanconi anaemia pathway of the DNA damage response, in regulating homologous recombination, and in DNA replication fork maintenance. MHF facilitates the processing of multiple types of branched DNAs by the DNA translocase FANCM. Here we report the crystal structure of a human MHF-DNA complex that reveals the DNA-binding mode of MHF. The structure suggests that MHF prefers branched DNA over double-stranded DNA because it engages two duplex arms. Biochemical analyses verify that MHF preferentially engages DNA forks or various four-way junctions independent of the junction-site structure. Furthermore, genetic experiments provide evidence that the observed DNA-binding interface of MHF is important for cellular resistance to DNA damage. These results offer insights into how the MHF complex recognizes branched DNA and stimulates FANCM activity at such a structure to promote genome maintenance.


    Organizational Affiliation

    Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA.,Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.,Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Research Foundation and University of Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA.,Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, Connecticut 06520, USA.,1] Department of Applied Physics, Yale University, New Haven, Connecticut 06511, USA [2] Department of Physics, Yale University, New Haven, Connecticut 06511, USA.,1] Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, Connecticut 06520, USA [2].




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Centromere protein S
A
93Homo sapiensMutation(s): 0 
Gene Names: CENPS (APITD1, FAAP16, MHF1)
Find proteins for Q8N2Z9 (Homo sapiens)
Go to Gene View: CENPS
Go to UniProtKB:  Q8N2Z9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Centromere protein X
B
74Homo sapiensMutation(s): 0 
Gene Names: CENPX (FAAP10, MHF2, STRA13)
Find proteins for A8MT69 (Homo sapiens)
Go to Gene View: CENPX
Go to UniProtKB:  A8MT69
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8007 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.231 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 61.969α = 90.00
b = 52.945β = 114.91
c = 60.283γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
ADSCdata collection
HKL-2000data scaling
HKL-2000data reduction
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-12-25
    Type: Initial release
  • Version 1.1: 2014-02-12
    Type: Database references