Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 

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

Macromolecule Content

• Total Structure Weight: 32.82 kDa 
• Atom Count: 2225 
• Modelled Residue Count: 250 
• Deposited Residue Count: 296 
• Unique protein chains: 4

1N0W

Crystal structure of a RAD51-BRCA2 BRC repeat complex

• DOI: 10.2210/pdb1N0W/pdb

• Classification: GENE REGULATION/ANTITUMOR PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2002-10-15 Released: 2002-11-27 
• Deposition Author(s): Pellegrini, L., Yu, D.S., Lo, T., Anand, S., Lee, M., Blundell, T.L., Venkitaraman, A.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.206 
• R-Value Work: 0.191 

Literature

Insights into DNA recombination from the structure of a RAD51-BRCA2 complex

Pellegrini, L., Yu, D.S., Lo, T., Anand, S., Lee, M., Blundell, T.L., Venkitaraman, A.R.

(2002) Nature 420: 287-293

• PubMed: 12442171 
• DOI: 10.1038/nature01230
• Primary Citation of Related Structures:  
  1N0W


• PubMed Abstract: 
  

The breast cancer susceptibility protein BRCA2 controls the function of RAD51, a recombinase enzyme, in pathways for DNA repair by homologous recombination. We report here the structure of a complex between an evolutionarily conserved sequence in BRCA2 (the BRC repeat) and the RecA-homology domain of RAD51. The BRC repeat mimics a motif in RAD51 that serves as an interface for oligomerization between individual RAD51 monomers, thus enabling BRCA2 to control the assembly of the RAD51 nucleoprotein filament, which is essential for strand-pairing reactions during DNA recombination. The RAD51 oligomerization motif is highly conserved among RecA-like recombinases, highlighting a common evolutionary origin for the mechanism of nucleoprotein filament formation, mirrored in the BRC repeat. Cancer-associated mutations that affect the BRC repeat disrupt its predicted interaction with RAD51, yielding structural insight into mechanisms for cancer susceptibility.

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Organizational Affiliation: 

University of Cambridge, Department of Biochemistry, Tennis Court Road, Cambridge CB2 1GA, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA repair protein RAD51 homolog 1	A	243	Homo sapiens	Mutation(s): 8  Gene Names: RAD51, RAD51A, RECA
Find proteins for Q06609 (Homo sapiens) Explore Q06609  Go to UniProtKB:  Q06609
NIH Common Fund Data Resources
PHAROS:  Q06609 GTEx:  ENSG00000051180

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Breast cancer type 2 susceptibility protein	B	35	Homo sapiens	Mutation(s): 0  Gene Names: BRCA2, FACD, FANCD1
Find proteins for P51587 (Homo sapiens) Explore P51587  Go to UniProtKB:  P51587
NIH Common Fund Data Resources
PHAROS:  P51587 GTEx:  ENSG00000139618

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
peptide linker	C [auth L]	14	N/A	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
ARTIFICIAL GLY-SER-MSE-GLY PEPTIDE	D [auth C]	4	N/A	Mutation(s): 0

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	G [auth A], H [auth A], I [auth A], J [auth A], K [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
CL	F [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M
MG	E [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.206 
• R-Value Work: 0.191 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.3	α = 90
b = 59.14	β = 90
c = 77.2	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
SHARP	phasing
CNS	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-10-15 
• Released Date: 2002-11-27 
Deposition Author(s): Pellegrini, L., Yu, D.S., Lo, T., Anand, S., Lee, M., Blundell, T.L., Venkitaraman, A.R.

Revision History  

• Version 1.0: 2002-11-27
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2016-05-25
  Changes: Source and taxonomy
• Version 1.4: 2020-01-22
  Changes: Advisory, Database references, Derived calculations