Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Macromolecule Content

• Total Structure Weight: 26209.00 
• Atom Count: 1774 
• Residue Count: 228 
• Unique protein chains: 2

1T29

Crystal structure of the BRCA1 BRCT repeats bound to a phosphorylated BACH1 peptide

• DOI: 10.2210/pdb1T29/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2004-04-20 Released: 2004-05-11 
• Deposition Author(s): Shiozaki, E.N., Gu, L., Yan, N., Shi, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.266 
• R-Value Work: 0.252 

Literature

Structure of the BRCT repeats of BRCA1 bound to a BACH1 phosphopeptide: implications for signaling.

Shiozaki, E.N., Gu, L., Yan, N., Shi, Y.

(2004) Mol.Cell 14: 405-412

• PubMed: 15125843 


• PubMed Abstract: 
  

The recognition of the phosphorylated BACH1 helicase by the BRCA1 C-terminal (BRCT) repeats is important to the tumor suppressor function of BRCA1. Here we report the crystal structure of the BRCT repeats of human BRCA1 bound to a phosphorylated BACH1 peptide at 2.3 A resolution. The phosphorylated serine 990 and phenylalanine 993 of BACH1 anchor the binding to BRCA1 through specific interactions with a surface cleft at the junction of the two BRCT repeats. This surface cleft is highly conserved in BRCA1 across species, suggesting an evolutionarily conserved function of phosphopeptide recognition. Importantly, conserved amino acids critical for BACH1 binding are frequently targeted for missense mutations in breast cancer. These mutations greatly diminish the ability of BRCA1 to interact with the phosphorylated BACH1 peptide. Additional structural analysis revealed significant implications for understanding the function of the BRCT family of proteins in DNA damage and repair signaling.

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Organizational Affiliation: 

Department of Molecular Biology, Lewis Thomas Laboratory, Princeton University, Princeton, NJ 08544, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Breast cancer type 1 susceptibility protein	A	214	Homo sapiens	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
Molecule	Chains	Sequence Length	Organism	Details
BACH1 phosphorylated peptide	B	14	Homo sapiens	Gene Names: BRIP1 (BACH1, FANCJ) EC: 3.6.4.13
Find proteins for Q9BX63 (Homo sapiens) Go to Gene View: BRIP1 Go to UniProtKB:  Q9BX63

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	B	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Free: 0.266 
• R-Value Work: 0.252 
• Space Group: P 3₂ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 63.177	α = 90.00
b = 63.177	β = 90.00
c = 105.532	γ = 120.00

Software Package:

Software Name	Purpose
AMoRE	phasing
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-04-20 
• Released Date: 2004-05-11 
• Deposition Author(s): Shiozaki, E.N., Gu, L., Yan, N., Shi, Y.

Revision History 

• Version 1.0: 2004-05-11
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance