4BXO

Architecture and DNA recognition elements of the Fanconi anemia FANCM- FAAP24 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Architecture and DNA Recognition Elements of the Fanconi Anemia Fancm-Faap24 Complex.

Coulthard, R.Deans, A.J.Swuec, P.Bowles, M.Costa, A.West, S.C.Mcdonald, N.Q.

(2013) Structure 21: 1648

  • DOI: 10.1016/j.str.2013.07.006
  • Primary Citation of Related Structures:  
    4BXO

  • PubMed Abstract: 
  • Fanconi anemia (FA) is a disorder associated with a failure in DNA repair. FANCM (defective in FA complementation group M) and its partner FAAP24 target other FA proteins to sites of DNA damage. FANCM-FAAP24 is related to XPF/MUS81 endonucleases but lacks endonucleolytic activity ...

    Fanconi anemia (FA) is a disorder associated with a failure in DNA repair. FANCM (defective in FA complementation group M) and its partner FAAP24 target other FA proteins to sites of DNA damage. FANCM-FAAP24 is related to XPF/MUS81 endonucleases but lacks endonucleolytic activity. We report a structure of an FANCM C-terminal fragment (FANCMCTD) bound to FAAP24 and DNA. This S-shaped structure reveals the FANCM (HhH)2 domain is buried, whereas the FAAP24 (HhH)2 domain engages DNA. We identify a second DNA contact and a metal center within the FANCM pseudo-nuclease domain and demonstrate that mutations in either region impair double-stranded DNA binding in vitro and FANCM-FAAP24 function in vivo. We show the FANCM translocase domain lies in proximity to FANCMCTD by electron microscopy and that binding fork DNA structures stimulate its ATPase activity. This suggests a tracking model for FANCM-FAAP24 until an encounter with a stalled replication fork triggers ATPase-mediated fork remodeling.


    Organizational Affiliation

    Structural Biology Laboratory, Cancer Research UK, London Research Institute, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FANCONI ANEMIA GROUP M PROTEINA254Homo sapiensMutation(s): 0 
Gene Names: FANCMKIAA1596
EC: 3.6.4.13
Find proteins for Q8IYD8 (Homo sapiens)
Explore Q8IYD8 
Go to UniProtKB:  Q8IYD8
NIH Common Fund Data Resources
PHAROS:  Q8IYD8
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FANCONI ANEMIA-ASSOCIATED PROTEIN OF 24 KDAB217Homo sapiensMutation(s): 0 
Gene Names: FAAP24C19orf40
Find proteins for Q9BTP7 (Homo sapiens)
Explore Q9BTP7 
Go to UniProtKB:  Q9BTP7
NIH Common Fund Data Resources
PHAROS:  Q9BTP7
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 3
    MoleculeChainsLengthOrganismImage
    5'-D(*TP*CP*AP*GP*CP*AP*TP*CP*AP*TP*CP)-3'C [auth H]11synthetic construct
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 4
      MoleculeChainsLengthOrganismImage
      5'-D(*GP*AP*TP*GP*AP*TP*GP*CP*TP*GP*CP)-3'D [auth I]11synthetic construct
      Small Molecules
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.15 Å
      • R-Value Free: 0.255 
      • R-Value Work: 0.204 
      • R-Value Observed: 0.206 
      • Space Group: P 41 21 2
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 125.1α = 90
      b = 125.1β = 90
      c = 74.76γ = 90
      Software Package:
      Software NamePurpose
      REFMACrefinement
      MOSFLMdata reduction
      SCALAdata scaling
      BNPphasing

      Structure Validation

      View Full Validation Report



      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2013-08-28
        Type: Initial release
      • Version 1.1: 2013-09-25
        Changes: Database references
      • Version 1.2: 2017-06-28
        Changes: Data collection