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Leung GP, et al.  (2011) Rtt107 is required for recruitment of the SMC5/6 complex to DNA double strand breaks. J Biol Chem 286(29):26250-7

Abstract: Genome integrity is maintained by a network of DNA damage response pathways, including checkpoints and DNA repair processes. In Saccharomyces cerevisiae, the BRCT domain-containing protein Rtt107/Esc4 is required for the restart of DNA replication after successful repair of DNA damage and for cellular resistance to DNA-damaging agents. In addition to its well characterized interaction with the endonuclease Slx4, Rtt107 interacts with a number of other DNA repair and recombination proteins. These include the evolutionarily conserved SMC5/6 complex, which is involved in numerous chromosome maintenance activities, such as DNA repair, chromosome segregation, and telomere function. The interaction between Rtt107 and the SMC5/6 complex was mediated through the N-terminal BRCT domains of Rtt107 and the Nse6 subunit of SMC5/6 and was independent of methyl methane sulfonate-induced damage and Slx4. Supporting a shared function in the DNA damage response, Rtt107 was required for recruitment of SMC5/6 to DNA double strand breaks. However, this functional relationship did not extend to other types of DNA lesions such as protein-bound nicks. Interestingly, Rtt107 was phosphorylated when SMC5/6 function was compromised in the absence of DNA-damaging agents, indicating a connection beyond the DNA damage response. Genetic analyses revealed that, although a subset of Rtt107 and SMC5/6 functions was shared, these proteins also contributed independently to maintenance of genome integrity.

Status: Published Type: Journal Article PubMed ID: 21642432

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Topics Genes linked to topics
KRE29 MMS21 NSE1 NSE3 NSE4 NSE5 RTT107 SLX4 SMC5 SMC6
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