Biological Assembly 1  

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 37769.29 
• Atom Count: 2098 
• Residue Count: 344 
• Unique protein chains: 3

4DAY

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

• DOI: 10.2210/pdb4DAY/pdb

• Classification: protein binding/Hydrolase
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2012-01-13 Released: 2012-03-14 
• Deposition Author(s): Hoadley, K.A., Keck, J.L.

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Experimental Data Snapshot

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

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

• PubMed: 22392978 
• 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 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.

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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
Molecule	Chains	Sequence Length	Organism	Details
RecQ-mediated genome instability protein 1	A	157	Homo sapiens	Mutation(s): 0  Gene Names: RMI1 (C9orf76)
Find proteins for Q9H9A7 (Homo sapiens) Go to Gene View: RMI1 Go to UniProtKB:  Q9H9A7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
RecQ-mediated genome instability protein 2	B	150	Homo sapiens	Mutation(s): 0  Gene Names: RMI2 (C16orf75)
Find proteins for Q96E14 (Homo sapiens) Go to Gene View: RMI2 Go to UniProtKB:  Q96E14

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
Fanconi anemia group M protein	C	37	Homo sapiens	Mutation(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 = 75.312	α = 90.00
b = 96.440	β = 90.00
c = 99.025	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data collection
HKL-2000	data reduction
PHASER	phasing
DENZO	data reduction
REFMAC	refinement
PDB_EXTRACT	data extraction
SCALEPACK	data scaling
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-01-13 
• Released Date: 2012-03-14 
• Deposition Author(s): Hoadley, K.A., Keck, J.L.

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