Synaptonemal complex protein SYCP3 impairs mitotic recombination by interfering with BRCA2
Copyright policy )Synaptonemal complex protein SYCP3 impairs mitotic recombination by interfering with BRCA2
The meiosis‐specific synaptonemal complex protein SYCP3 has been reported to be aberrantly expressed in tumours. However, in contrast to its well‐defined function in meiosis, its possible role in mitotic cells is entirely unknown. Here, we show that SYCP3 is expressed in a range of primary tumours and that it impairs chromosomal integrity in mitotic cells. Expression of SYCP3 inhibits the homologous recombination (HR) pathway mediated by RAD51, inducing hypersensitivity to DNA‐damaging agents such as a poly(ADP‐ribose) polymerase (PARP) inhibitor and chromosomal instability. SYCP3 forms a complex with BRCA2 and inhibits its role in HR. These findings highlight a new mechanism for chromosomal instability in cancer and extend the range of PARP‐inhibitor sensitive tumours to those expressing SYCP3.
- University of Tokyo Japan
- Hiroshima University Japan
BRCA2 Protein, DNA Repair, Scientific Reports, Mitosis, Nuclear Proteins, Cell Cycle Proteins, Hep G2 Cells, Poly(ADP-ribose) Polymerase Inhibitors, Aneuploidy, Radiation Tolerance, DNA-Binding Proteins, Drug Resistance, Neoplasm, Chromosomal Instability, Humans, Gene Silencing, Rad51 Recombinase, Homologous Recombination, Sister Chromatid Exchange, DNA Damage, Protein Binding
BRCA2 Protein, DNA Repair, Scientific Reports, Mitosis, Nuclear Proteins, Cell Cycle Proteins, Hep G2 Cells, Poly(ADP-ribose) Polymerase Inhibitors, Aneuploidy, Radiation Tolerance, DNA-Binding Proteins, Drug Resistance, Neoplasm, Chromosomal Instability, Humans, Gene Silencing, Rad51 Recombinase, Homologous Recombination, Sister Chromatid Exchange, DNA Damage, Protein Binding
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