RRN1, DNA-directed RNA polymerase I core subunit RPA190, A190, L000001675, YOR341W
RNA polymerase I largest subunit A190
GO Process (2)
GO Function (1)
GO Component (2)
Saccharomyces cerevisiae (S288c)


putative DNA-dependent ATPase RAD55, L000001575, YDR076W
Protein that stimulates strand exchange; stimulates strand exchange by stabilizing the binding of Rad51p to single-stranded DNA; involved in the recombinational repair of double-strand breaks in DNA during vegetative growth and meiosis; forms heterodimer with Rad57p
GO Process (4)
GO Function (2)
GO Component (2)
Saccharomyces cerevisiae (S288c)

Phenotypic Suppression

A genetic interaction is inferred when mutation or over expression of one gene results in suppression of any phenotype (other than lethality/growth defect) associated with mutation or over expression of another gene.


Opposing role of condensin and radiation-sensitive gene RAD52 in ribosomal DNA stability regulation.

Tsang CK, Zheng XF

Blocking target of rapamycin signaling by starvation or rapamycin inhibits ribosomal DNA (rDNA) transcription and causes condensin-mediated rDNA condensation and nucleolar contraction. In the absence of condensin, however, repression of rDNA transcription leads to rDNA instability and elevated level of extrachromosomal rDNA circles and nucleolar fragmentation. Here, we show that mutations in the Rad52 homologous recombination machinery block rDNA instability. ... [more]

J. Biol. Chem. Aug. 14, 2009; 284(33);21908-19 [Pubmed: 19520859]


  • Low Throughput

Ontology Terms

  • phenotype: chromosome/plasmid maintenance (APO:0000143)

Additional Notes

  • deletion blocks the rDNA chromosome instability caused by deletion of rpa190

Curated By

  • BioGRID