GDSC277_Resub_DNAREP-S-08-00156_full_2.doc (4.5 MB)
The role of novel genes rrp1(+) and rrp2(+) in the repair of DNA damage in Schizosaccharomycespombe
journal contribution
posted on 2023-06-07, 14:58 authored by Dorota Dziadkowiec, Edyta Petters, Agnieszka Dyjankiewicz, Pawel Karpinski, Valerie Garcia, Adam WatsonAdam Watson, Antony CarrAntony CarrWe identified two predicted proteins in Schizosaccharomyces pombe, Rrp1 (SPAC17A2.12) and Rrp2 (SPBC23E6.02) that share 34% and 36% similarity to Saccharomyces cerevisiae Ris1p, respectively. Ris1p is a DNA-dependent ATP-ase involved in gene silencing and DNA repair. Rrp1 and Rrp2 also share similarity with S. cerevisiae Rad5 and S. pombe Rad8, containing SNF2-N, RING finger and Helicase-C domains. To investigate the function of the Rrp proteins, we studied the DNA damage sensitivities and genetic interactions of null mutants with known DNA repair mutants. Single Deltarrp1 and Deltarrp2 mutants were not sensitive to CPT, 4NQO, CDPP, MMS, HU, UV or IR. The double mutants Deltarrp1 Deltarhp51 and Deltarrp2 Deltarhp51 plus the triple Deltarrp1 Deltarrp2 Deltarhp51 mutant did not display significant additional sensitivity. However, the double mutants Deltarrp1 Deltarhp57 and Deltarrp2 Deltarhp57 were significantly more sensitive to MMS, CPT, HU and IR than the Deltarhp57 single mutant. The checkpoint response in these strains was functional. In S. pombe, Rhp55/57 acts in parallel with a second mediator complex, Swi5/Sfr1, to facilitate Rhp51-dependent DNA repair. Deltarrp1 Deltasfr1 and Deltarrp2 Deltasfr1 double mutants did not show significant additional sensitivity, suggesting a function for Rrp proteins in the Swi5/Sfr1 pathway of DSB repair. Consistent with this, Deltarrp1 Deltarhp57 and Deltarrp2 Deltarhp57 mutants, but not Deltarrp1 Deltasfr1 or Deltarrp2 Deltasfr1 double mutants, exhibited slow growth and aberrations in cell and nuclear morphology that are typical of Deltarhp51.
History
Publication status
- Published
Journal
DNA RepairISSN
1568-7864Publisher
ELSEVIERIssue
5Volume
8Page range
627-636Department affiliated with
- Sussex Centre for Genome Damage Stability Publications
Notes
Endnotes GDSC277Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2009-02-26Usage metrics
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