Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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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: 33689.99 
• Atom Count: 2272 
• Residue Count: 307 
• Unique protein chains: 2

3MXN

Crystal structure of the RMI core complex

• DOI: 10.2210/pdb3MXN/pdb

• Classification: REPLICATION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2010-05-07 Released: 2010-09-15 
• Deposition Author(s): Hoadley, K.A., Xu, D., Xue, Y., Satyshur, K.A., Wang, W., Keck, J.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.231 
• R-Value Work: 0.195 

Literature

Structure and cellular roles of the RMI core complex from the bloom syndrome dissolvasome.

Hoadley, K.A., Xu, D., Xue, Y., Satyshur, K.A., Wang, W., Keck, J.L.

(2010) Structure 18: 1149-1158

• PubMed: 20826341 
• DOI: 10.1016/j.str.2010.06.009


• PubMed Abstract: 
  

BLM, the protein product of the gene mutated in Bloom syndrome, is one of five human RecQ helicases. It functions to separate double Holliday junction DNA without genetic exchange as a component of the "dissolvasome," which also includes topoisomerase IIIα and the RMI (RecQ-mediated genome instability) subcomplex (RMI1 and RMI2). We describe the crystal structure of the RMI core complex, comprising RMI2 and the C-terminal OB domain of RMI1. The overall RMI core structure strongly resembles two-thirds of the trimerization core of the eukaryotic single-stranded DNA-binding protein, Replication Protein A. Immunoprecipitation experiments with RMI2 variants confirm key interactions that stabilize the RMI core interface. Disruption of this interface leads to a dramatic increase in cellular sister chromatid exchange events similar to that seen in BLM-deficient cells. The RMI core interface is therefore crucial for BLM dissolvasome assembly and may have additional cellular roles as a docking hub for other proteins.

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Organizational Affiliation: 

Department of Biomolecular Chemistry, University of Wisconsin School of Medicine and Public Health, 550 Medical Science Center, 1300 University Avenue, Madison, WI 53706-1532, 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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
BEN	A	BENZAMIDINE C7 H8 N2 PXXJHWLDUBFPOL-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.231 
• R-Value Work: 0.195 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 42.096	α = 90.00
b = 42.223	β = 90.00
c = 152.240	γ = 90.00

Software Package:

Software Name	Purpose
HKL-2000	data scaling
MAR345	data collection
ARP/wARP	model building
HKL-2000	data reduction
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-05-07 
• Released Date: 2010-09-15 
• Deposition Author(s): Hoadley, K.A., Xu, D., Xue, Y., Satyshur, K.A., Wang, W., Keck, J.L.

Revision History 

• Version 1.0: 2010-09-15
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance
• Version 1.2: 2017-11-08
  Type: Refinement description