4M6W

Crystal structure of the C-terminal segment of FANCM in complex with FAAP24


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.257 

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This is version 1.1 of the entry. See complete history


Literature

Structural insights into the functions of the FANCM-FAAP24 complex in DNA repair.

Yang, H.Zhang, T.Tao, Y.Wang, F.Tong, L.Ding, J.

(2013) Nucleic Acids Res 41: 10573-10583

  • DOI: 10.1093/nar/gkt788
  • Primary Citation of Related Structures:  
    4M6W

  • PubMed Abstract: 
  • Fanconi anemia (FA) is a genetically heterogeneous disorder associated with deficiencies in the FA complementation group network. FA complementation group M (FANCM) and FA-associated protein 24 kDa (FAAP24) form a stable complex to anchor the FA core complex to chromatin in repairing DNA interstrand crosslinks ...

    Fanconi anemia (FA) is a genetically heterogeneous disorder associated with deficiencies in the FA complementation group network. FA complementation group M (FANCM) and FA-associated protein 24 kDa (FAAP24) form a stable complex to anchor the FA core complex to chromatin in repairing DNA interstrand crosslinks. Here, we report the first crystal structure of the C-terminal segment of FANCM in complex with FAAP24. The C-terminal segment of FANCM and FAAP24 both consist of a nuclease domain at the N-terminus and a tandem helix-hairpin-helix (HhH)2 domain at the C-terminus. The FANCM-FAAP24 complex exhibits a similar architecture as that of ApXPF. However, the variations of several key residues and the electrostatic property at the active-site region render a catalytically inactive nuclease domain of FANCM, accounting for the lack of nuclease activity. We also show that the first HhH motif of FAAP24 is a potential binding site for DNA, which plays a critical role in targeting FANCM-FAAP24 to chromatin. These results reveal the mechanistic insights into the functions of FANCM-FAAP24 in DNA repair.


    Organizational Affiliation

    State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, China, Graduate School of Chinese Academy of Sciences, 320 Yue-Yang Road, Shanghai 200031, China and Department of Biological Sciences, Columbia University, New York, NY 10027, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fanconi anemia group M proteinA221Homo sapiensMutation(s): 0 
Gene Names: FANCMKIAA1596
EC: 3.6.4.13
UniProt & NIH Common Fund Data Resources
Find proteins for Q8IYD8 (Homo sapiens)
Explore Q8IYD8 
Go to UniProtKB:  Q8IYD8
PHAROS:  Q8IYD8
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Fanconi anemia-associated protein of 24 kDaB208Homo sapiensMutation(s): 0 
Gene Names: FAAP24C19orf40
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BTP7 (Homo sapiens)
Explore Q9BTP7 
Go to UniProtKB:  Q9BTP7
PHAROS:  Q9BTP7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C [auth A], D [auth A], E [auth B]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.254 
  • R-Value Observed: 0.257 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.174α = 90
b = 98.111β = 90
c = 140.156γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
AutoSolphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-10-02
    Type: Initial release
  • Version 1.1: 2015-06-17
    Changes: Database references