4Y18

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.233 

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:  

  • 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 Abraxa ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Breast cancer type 1 susceptibility protein
A, B, C, D, E, F, G, H
224Homo sapiensMutation(s): 0 
Gene Names: BRCA1 (RNF53)
EC: 2.3.2.27
Find proteins for P38398 (Homo sapiens)
Go to Gene View: BRCA1
Go to UniProtKB:  P38398
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BRCA1-A complex subunit Abraxas
I, J, K, L, M, N, O, P
11Homo sapiensMutation(s): 0 
Gene Names: ABRAXAS1 (ABRA1, CCDC98, FAM175A)
Find proteins for Q6UWZ7 (Homo sapiens)
Go to Gene View: ABRAXAS1
Go to UniProtKB:  Q6UWZ7
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
I, J, K, L, M, N, O, P
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.233 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 86.819α = 90.00
b = 183.726β = 90.00
c = 190.510γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
SCALAdata scaling
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2015-02-06 
  • Released Date: 2016-01-27 
  • Deposition Author(s): Wu, Q., Blundell, T.L.

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

Revision History 

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