4DAY

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.216 

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.USA 109: 4437-4442

  • DOI: 10.1073/pnas.1117279109

  • 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 potential ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
RecQ-mediated genome instability protein 1
A
157Homo sapiensMutation(s): 0 
Gene Names: RMI1 (C9orf76)
Find proteins for Q9H9A7 (Homo sapiens)
Go to Gene View: RMI1
Go to UniProtKB:  Q9H9A7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
RecQ-mediated genome instability protein 2
B
150Homo sapiensMutation(s): 0 
Gene Names: RMI2 (C16orf75)
Find proteins for Q96E14 (Homo sapiens)
Go to Gene View: RMI2
Go to UniProtKB:  Q96E14
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fanconi anemia group M protein
C
37Homo sapiensMutation(s): 0 
Gene Names: FANCM (KIAA1596)
EC: 3.6.4.13
Find proteins for Q8IYD8 (Homo sapiens)
Go to Gene View: FANCM
Go to UniProtKB:  Q8IYD8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.325 
  • R-Value Work: 0.216 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 75.312α = 90.00
b = 96.440β = 90.00
c = 99.025γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
HKL-2000data reduction
PHASERphasing
DENZOdata reduction
REFMACrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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