The BRCT domain is a phospho-protein binding domain

Science. 2003 Oct 24;302(5645):639-42. doi: 10.1126/science.1088753.

Abstract

The carboxyl-terminal domain (BRCT) of the Breast Cancer Gene 1 (BRCA1) protein is an evolutionarily conserved module that exists in a large number of proteins from prokaryotes to eukaryotes. Although most BRCT domain-containing proteins participate in DNA-damage checkpoint or DNA-repair pathways, or both, the function of the BRCT domain is not fully understood. We show that the BRCA1 BRCT domain directly interacts with phosphorylated BRCA1-Associated Carboxyl-terminal Helicase (BACH1). This specific interaction between BRCA1 and phosphorylated BACH1 is cell cycle regulated and is required for DNA damage-induced checkpoint control during the transition from G2 to M phase of the cell cycle. Further, we show that two other BRCT domains interact with their respective physiological partners in a phosphorylation-dependent manner. Thirteen additional BRCT domains also preferentially bind phospho-peptides rather than nonphosphorylated control peptides. These data imply that the BRCT domain is a phospho-protein binding domain involved in cell cycle control.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Amino Acid Motifs
  • BRCA1 Protein / chemistry*
  • BRCA1 Protein / metabolism*
  • Carrier Proteins / chemistry
  • Carrier Proteins / metabolism
  • Cell Cycle
  • Cell Cycle Proteins*
  • Cell Line
  • DNA Damage
  • DNA Repair
  • DNA-Binding Proteins*
  • E2F Transcription Factors
  • Fanconi Anemia Complementation Group Proteins
  • G2 Phase
  • Humans
  • Mitosis
  • Mutation
  • Nuclear Proteins
  • Peptide Library
  • Phosphoprotein Phosphatases / chemistry
  • Phosphoprotein Phosphatases / metabolism
  • Phosphoproteins / chemistry
  • Phosphoproteins / genetics
  • Phosphoproteins / metabolism*
  • Phosphorylation
  • Phosphoserine / metabolism
  • Protein Binding
  • Protein Structure, Tertiary
  • RNA Helicases / chemistry
  • RNA Helicases / genetics
  • RNA Helicases / metabolism*
  • RNA Polymerase II / metabolism
  • RNA, Small Interfering
  • Recombinant Fusion Proteins / chemistry
  • Recombinant Fusion Proteins / metabolism
  • Transcription Factors / metabolism
  • Transfection
  • Tumor Cells, Cultured

Substances

  • BRCA1 Protein
  • Carrier Proteins
  • Cell Cycle Proteins
  • DNA-Binding Proteins
  • E2F Transcription Factors
  • Fanconi Anemia Complementation Group Proteins
  • Nuclear Proteins
  • Peptide Library
  • Phosphoproteins
  • RNA, Small Interfering
  • Recombinant Fusion Proteins
  • TOPBP1 protein, human
  • Transcription Factors
  • Phosphoserine
  • RNA Polymerase II
  • Phosphoprotein Phosphatases
  • carboxy-terminal domain phosphatase
  • BRIP1 protein, human
  • RNA Helicases