TY - JOUR
T1 - Identification of the MMS22L-TONSL complex that promotes homologous recombination
AU - Duro, Eris
AU - Lundin, Cecilia
AU - Ask, Katrine
AU - Sanchez-Pulido, Luis
AU - MacArtney, Thomas J.
AU - Toth, Rachel
AU - Ponting, Chris P.
AU - Groth, Anja
AU - Helleday, Thomas
AU - Rouse, John
PY - 2010/11/24
Y1 - 2010/11/24
N2 - Budding yeast Mms22 is required for homologous recombination (HR)-mediated repair of stalled or broken DNA replication forks. Here we identify a human Mms22-like protein (MMS22L) and an MMS22L-interacting protein, NF kappa BIL2/TONSL. Depletion of MMS22L or TONSL from human cells causes a high level of double-strand breaks (DSBs) during DNA replication. Both proteins accumulate at stressed replication forks, and depletion of MMS22L or TONSL from cells causes hypersensitivity to agents that cause S phase-associated DSBs, such as topoisomerase (TOP) inhibitors. In this light, MMS22L and TONSL are required for the HR-mediated repair of replication fork-associated DSBs. In cells depleted of either protein, DSBs induced by the TOP1 inhibitor camptothecin are resected normally, but the loading of the RAD51 recombinase is defective. Therefore, MMS22L and TONSL are required for the maintenance of genome stability when unscheduled DSBs occur in the vicinity of DNA replication forks.
AB - Budding yeast Mms22 is required for homologous recombination (HR)-mediated repair of stalled or broken DNA replication forks. Here we identify a human Mms22-like protein (MMS22L) and an MMS22L-interacting protein, NF kappa BIL2/TONSL. Depletion of MMS22L or TONSL from human cells causes a high level of double-strand breaks (DSBs) during DNA replication. Both proteins accumulate at stressed replication forks, and depletion of MMS22L or TONSL from cells causes hypersensitivity to agents that cause S phase-associated DSBs, such as topoisomerase (TOP) inhibitors. In this light, MMS22L and TONSL are required for the HR-mediated repair of replication fork-associated DSBs. In cells depleted of either protein, DSBs induced by the TOP1 inhibitor camptothecin are resected normally, but the loading of the RAD51 recombinase is defective. Therefore, MMS22L and TONSL are required for the maintenance of genome stability when unscheduled DSBs occur in the vicinity of DNA replication forks.
UR - http://www.scopus.com/inward/record.url?scp=78649321007&partnerID=8YFLogxK
U2 - 10.1016/j.molcel.2010.10.023
DO - 10.1016/j.molcel.2010.10.023
M3 - Article
C2 - 21055984
SN - 1097-2765
VL - 40
SP - 632
EP - 644
JO - Molecular Cell
JF - Molecular Cell
IS - 4
ER -