Abstract
Most spontaneous DNA double-strand breaks (DSBs) arise during replication and are repaired by homologous recombination (HR) with the sister chromatid. Many proteins participate in HR, but it is often difficult to determine their in vivo functions due to the existence of alternative pathways. Here we take advantage of an in vivo assay to assess repair of a specific replication-born DSB by sister chromatid recombination (SCR). We analyzed the functional relevance of four structure-selective endonucleases (SSEs), Yen1, Mus81-Mms4, Slx1-Slx4, and Rad1, on SCR in Saccharomyces cerevisiae. Physical and genetic analyses showed that ablation of any of these SSEs leads to a specific SCR decrease that is not observed in general HR. Our work suggests that Yen1, Mus81-Mms4, Slx4, and Rad1, but not Slx1, function independently in the cleavage of intercrossed DNA structures to reconstitute broken replication forks via HR with the sister chromatid. These unique effects, which have not been detected in other studies unless double mutant combinations were used, indicate the formation of distinct alternatives for the repair of replicationborn DSBs that require specific SSEs.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1592-1603 |
| Number of pages | 12 |
| Journal | Molecular and Cellular Biology |
| Volume | 32 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 2012 |
Fingerprint
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology
Cite this
Distinct roles of Mus81, Yen1, Slx1-Slx4, and Rad1 nucleases in the repair of replication-born double-strand breaks by sister chromatid exchange. / Sandra, Muñoz Galván; Tous, Cristina; Blanco, Miguel G.; Schwartz, Erin K.; Ehmsen, Kirk T.; West, Stephen C.; Heyer, Wolf Dietrich; Aguilera, Andrés.
In: Molecular and Cellular Biology, Vol. 32, No. 9, 05.2012, p. 1592-1603.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Distinct roles of Mus81, Yen1, Slx1-Slx4, and Rad1 nucleases in the repair of replication-born double-strand breaks by sister chromatid exchange
AU - Sandra, Muñoz Galván
AU - Tous, Cristina
AU - Blanco, Miguel G.
AU - Schwartz, Erin K.
AU - Ehmsen, Kirk T.
AU - West, Stephen C.
AU - Heyer, Wolf Dietrich
AU - Aguilera, Andrés
PY - 2012/5
Y1 - 2012/5
N2 - Most spontaneous DNA double-strand breaks (DSBs) arise during replication and are repaired by homologous recombination (HR) with the sister chromatid. Many proteins participate in HR, but it is often difficult to determine their in vivo functions due to the existence of alternative pathways. Here we take advantage of an in vivo assay to assess repair of a specific replication-born DSB by sister chromatid recombination (SCR). We analyzed the functional relevance of four structure-selective endonucleases (SSEs), Yen1, Mus81-Mms4, Slx1-Slx4, and Rad1, on SCR in Saccharomyces cerevisiae. Physical and genetic analyses showed that ablation of any of these SSEs leads to a specific SCR decrease that is not observed in general HR. Our work suggests that Yen1, Mus81-Mms4, Slx4, and Rad1, but not Slx1, function independently in the cleavage of intercrossed DNA structures to reconstitute broken replication forks via HR with the sister chromatid. These unique effects, which have not been detected in other studies unless double mutant combinations were used, indicate the formation of distinct alternatives for the repair of replicationborn DSBs that require specific SSEs.
AB - Most spontaneous DNA double-strand breaks (DSBs) arise during replication and are repaired by homologous recombination (HR) with the sister chromatid. Many proteins participate in HR, but it is often difficult to determine their in vivo functions due to the existence of alternative pathways. Here we take advantage of an in vivo assay to assess repair of a specific replication-born DSB by sister chromatid recombination (SCR). We analyzed the functional relevance of four structure-selective endonucleases (SSEs), Yen1, Mus81-Mms4, Slx1-Slx4, and Rad1, on SCR in Saccharomyces cerevisiae. Physical and genetic analyses showed that ablation of any of these SSEs leads to a specific SCR decrease that is not observed in general HR. Our work suggests that Yen1, Mus81-Mms4, Slx4, and Rad1, but not Slx1, function independently in the cleavage of intercrossed DNA structures to reconstitute broken replication forks via HR with the sister chromatid. These unique effects, which have not been detected in other studies unless double mutant combinations were used, indicate the formation of distinct alternatives for the repair of replicationborn DSBs that require specific SSEs.
UR - http://www.scopus.com/inward/record.url?scp=84861406975&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84861406975&partnerID=8YFLogxK
U2 - 10.1128/MCB.00111-12
DO - 10.1128/MCB.00111-12
M3 - Article
C2 - 22354996
AN - SCOPUS:84861406975
VL - 32
SP - 1592
EP - 1603
JO - Molecular and Cellular Biology
JF - Molecular and Cellular Biology
SN - 0270-7306
IS - 9
ER -