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 

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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

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FANCONI ANEMIA GROUP M PROTEINA254Homo sapiensMutation(s): 0 
Gene Names: FANCM, KIAA1596
EC: 3.6.4.13
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYD8 (Homo sapiens)
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Go to UniProtKB:  Q8IYD8
PHAROS:  Q8IYD8
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UniProt GroupQ8IYD8
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FANCONI ANEMIA-ASSOCIATED PROTEIN OF 24 KDAB217Homo sapiensMutation(s): 0 
Gene Names: FAAP24, C19orf40
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BTP7 (Homo sapiens)
Explore Q9BTP7 
Go to UniProtKB:  Q9BTP7
PHAROS:  Q9BTP7
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UniProt GroupQ9BTP7
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
5'-D(*TP*CP*AP*GP*CP*AP*TP*CP*AP*TP*CP)-3'C [auth H]11synthetic construct
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  • Reference Sequence

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Entity ID: 4
MoleculeChainsLengthOrganismImage
5'-D(*GP*AP*TP*GP*AP*TP*GP*CP*TP*GP*CP)-3'D [auth I]11synthetic construct
Protein Feature View
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  • Reference Sequence
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

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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