4DAY

Crystal structure of the RMI core complex with MM2 peptide from FANCM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.222 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Defining the molecular interface that connects the Fanconi anemia protein FANCM to the Bloom syndrome dissolvasome.

Hoadley, K.A.Xue, Y.Ling, C.Takata, M.Wang, W.Keck, J.L.

(2012) Proc Natl Acad Sci U S A 109: 4437-4442

  • DOI: 10.1073/pnas.1117279109
  • Primary Citation of Related Structures:  
    4DAY

  • PubMed Abstract: 
  • The RMI subcomplex (RMI1/RMI2) functions with the BLM helicase and topoisomerase IIIα in a complex called the "dissolvasome," which separates double-Holliday junction DNA structures that can arise during DNA repair. This activity suppresses potentially harmful sister chromatid exchange (SCE) events in wild-type cells but not in cells derived from Bloom syndrome patients with inactivating BLM mutations ...

    The RMI subcomplex (RMI1/RMI2) functions with the BLM helicase and topoisomerase IIIα in a complex called the "dissolvasome," which separates double-Holliday junction DNA structures that can arise during DNA repair. This activity suppresses potentially harmful sister chromatid exchange (SCE) events in wild-type cells but not in cells derived from Bloom syndrome patients with inactivating BLM mutations. The RMI subcomplex also associates with FANCM, a component of the Fanconi anemia (FA) core complex that is important for repair of stalled DNA replication forks. The RMI/FANCM interface appears to help coordinate dissolvasome and FA core complex activities, but its precise role remains poorly understood. Here, we define the structure of the RMI/FANCM interface and investigate its roles in coordinating cellular DNA-repair activities. The X-ray crystal structure of the RMI core complex bound to a well-conserved peptide from FANCM shows that FANCM binds to both RMI proteins through a hydrophobic "knobs-into-holes" packing arrangement. The RMI/FANCM interface is shown to be critical for interaction between the components of the dissolvasome and the FA core complex. FANCM variants that substitute alanine for key interface residues strongly destabilize the complex in solution and lead to increased SCE levels in cells that are similar to those observed in blm- or fancm-deficient cells. This study provides a molecular view of the RMI/FANCM complex and highlights a key interface utilized in coordinating the activities of two critical eukaryotic DNA-damage repair machines.


    Organizational Affiliation

    Department of Biomolecular Chemistry, 420 Henry Mall, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RecQ-mediated genome instability protein 1 A157Homo sapiensMutation(s): 0 
Gene Names: RMI1C9orf76
Find proteins for Q9H9A7 (Homo sapiens)
Explore Q9H9A7 
Go to UniProtKB:  Q9H9A7
NIH Common Fund Data Resources
PHAROS:  Q9H9A7
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RecQ-mediated genome instability protein 2 B150Homo sapiensMutation(s): 0 
Gene Names: RMI2C16orf75
Find proteins for Q96E14 (Homo sapiens)
Explore Q96E14 
Go to UniProtKB:  Q96E14
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PHAROS:  Q96E14
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Fanconi anemia group M protein C37Homo 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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.222 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.312α = 90
b = 96.44β = 90
c = 99.025γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-14
    Type: Initial release
  • Version 1.1: 2012-05-16
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description