4Y2G

Structure of BRCA1 BRCT domains in complex with Abraxas single phosphorylated peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.218 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of BRCA1-BRCT/Abraxas Complex Reveals Phosphorylation-Dependent BRCT Dimerization at DNA Damage Sites.

Wu, Q.Paul, A.Su, D.Mehmood, S.Foo, T.K.Ochi, T.Bunting, E.L.Xia, B.Robinson, C.V.Wang, B.Blundell, T.L.

(2016) Mol Cell 61: 434-448

  • DOI: 10.1016/j.molcel.2015.12.017
  • Primary Citation of Related Structures:  
    4Y18, 4Y2G

  • PubMed Abstract: 
  • BRCA1 accumulation at DNA damage sites is an important step for its function in the DNA damage response and in DNA repair. BRCA1-BRCT domains bind to proteins containing the phosphorylated serine-proline-x-phenylalanine (pSPxF) motif including Abraxas, Bach1/FancJ, and CtIP ...

    BRCA1 accumulation at DNA damage sites is an important step for its function in the DNA damage response and in DNA repair. BRCA1-BRCT domains bind to proteins containing the phosphorylated serine-proline-x-phenylalanine (pSPxF) motif including Abraxas, Bach1/FancJ, and CtIP. In this study, we demonstrate that ionizing radiation (IR)-induces ATM-dependent phosphorylation of serine 404 (S404) next to the pSPxF motif. Crystal structures of BRCT/Abraxas show that phosphorylation of S404 is important for extensive interactions through the N-terminal sequence outside the pSPxF motif and leads to formation of a stable dimer. Mutation of S404 leads to deficiency in BRCA1 accumulation at DNA damage sites and cellular sensitivity to IR. In addition, two germline mutations of BRCA1 are found to disrupt the dimer interface and dimer formation. Thus, we demonstrate a mechanism involving IR-induced phosphorylation and dimerization of the BRCT/Abraxas complex for regulating Abraxas-mediated recruitment of BRCA1 in response to IR.


    Organizational Affiliation

    Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, CB2 1GA Cambridge, UK. Electronic address: tom@cryst.bioc.cam.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Breast cancer type 1 susceptibility proteinA224Homo sapiensMutation(s): 0 
Gene Names: BRCA1RNF53
EC: 6.3.2 (PDB Primary Data), 2.3.2.27 (UniProt)
Find proteins for P38398 (Homo sapiens)
Explore P38398 
Go to UniProtKB:  P38398
NIH Common Fund Data Resources
PHAROS:  P38398
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BRCA1-A complex subunit AbraxasB7Homo sapiensMutation(s): 0 
Gene Names: ABRAXAS1ABRA1CCDC98FAM175AUNQ496/PRO1013
Find proteins for Q6UWZ7 (Homo sapiens)
Explore Q6UWZ7 
Go to UniProtKB:  Q6UWZ7
NIH Common Fund Data Resources
PHAROS:  Q6UWZ7
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
BL-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.218 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.847α = 90
b = 63.847β = 90
c = 93.367γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-02-09 
  • Released Date: 2016-01-27 
  • Deposition Author(s): Wu, Q., Blundell, T.L.

Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom093167/Z/10/Z

Revision History  (Full details and data files)

  • Version 1.0: 2016-01-27
    Type: Initial release
  • Version 1.1: 2016-02-17
    Changes: Database references