8PBC

RAD51 filament on ssDNA bound by the BRCA2 c-terminus


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.61 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis for stabilisation of the RAD51 nucleoprotein filament by BRCA2.

Appleby, R.Joudeh, L.Cobbett, K.Pellegrini, L.

(2023) Nat Commun 14: 7003-7003

  • DOI: https://doi.org/10.1038/s41467-023-42830-1
  • Primary Citation of Related Structures:  
    8PBC, 8PBD

  • PubMed Abstract: 

    The BRCA2 tumour suppressor protein preserves genomic integrity via interactions with the DNA-strand exchange RAD51 protein in homology-directed repair. The RAD51-binding TR2 motif at the BRCA2 C-terminus is essential for protection and restart of stalled replication forks. Biochemical evidence shows that TR2 recognises filamentous RAD51, but existing models of TR2 binding to RAD51 lack a structural basis. Here we used cryo-electron microscopy and structure-guided mutagenesis to elucidate the mechanism of TR2 binding to nucleoprotein filaments of human RAD51. We find that TR2 binds across the protomer interface in the filament, acting as a brace for adjacent RAD51 molecules. TR2 targets an acidic-patch motif on human RAD51 that serves as a recruitment hub in fission yeast Rad51 for recombination mediators Rad52 and Rad55-Rad57. Our findings provide a structural rationale for RAD51 filament stabilisation by BRCA2 and reveal a common recruitment mechanism of recombination mediators to the RAD51 filament.


  • Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge, CB2 1GA, UK.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA repair protein RAD51 homolog 1
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K
339Homo sapiensMutation(s): 0 
Gene Names: RAD51RAD51ARECA
UniProt & NIH Common Fund Data Resources
Find proteins for Q06609 (Homo sapiens)
Explore Q06609 
Go to UniProtKB:  Q06609
PHAROS:  Q06609
GTEx:  ENSG00000051180 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06609
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Breast cancer type 2 susceptibility protein
L, M, N, O, P
L, M, N, O, P, Q, R, S, T, U
49Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P51587 (Homo sapiens)
Explore P51587 
Go to UniProtKB:  P51587
PHAROS:  P51587
GTEx:  ENSG00000139618 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP51587
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (30-MER)30synthetic construct
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download Ideal Coordinates CCD File 
AA [auth B]
BB [auth K]
DA [auth C]
GA [auth D]
JA [auth E]
AA [auth B],
BB [auth K],
DA [auth C],
GA [auth D],
JA [auth E],
MA [auth F],
PA [auth G],
SA [auth H],
VA [auth I],
W [auth A],
YA [auth J]
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
AB [auth J]
BA [auth B]
CA [auth B]
CB [auth K]
EA [auth C]
AB [auth J],
BA [auth B],
CA [auth B],
CB [auth K],
EA [auth C],
FA [auth C],
HA [auth D],
IA [auth D],
KA [auth E],
LA [auth E],
NA [auth F],
OA [auth F],
QA [auth G],
RA [auth G],
TA [auth H],
UA [auth H],
WA [auth I],
X [auth A],
XA [auth I],
Y [auth A],
Z [auth A],
ZA [auth J]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.61 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1
MODEL REFINEMENTPHENIXdev-4707

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom221892/Z/20/
Biotechnology and Biological Sciences Research Council (BBSRC)United Kingdom2271086

Revision History  (Full details and data files)

  • Version 1.0: 2023-11-15
    Type: Initial release