BAIT
XRN1
DST2, KEM1, RAR5, SEP1, SKI1, chromatin-binding exonuclease XRN1, L000000891, L000001902, YGL173C
Evolutionarily-conserved 5'-3' exonuclease; component of cytoplasmic processing (P) bodies involved in mRNA decay; also enters the nucleus and positively regulates transcription initiation and elongation; plays a role in microtubule-mediated processes, filamentous growth, ribosomal RNA maturation, and telomere maintenance; activated by the scavenger decapping enzyme Dcs1p
GO Process (6)
GO Function (3)
GO Component (4)
Gene Ontology Biological Process
- nonfunctional rRNA decay [IMP]
- nuclear-transcribed mRNA catabolic process [IMP]
- nuclear-transcribed mRNA catabolic process, nonsense-mediated decay [IMP]
- positive regulation of transcription elongation from RNA polymerase II promoter [IMP]
- positive regulation of transcription initiation from RNA polymerase II promoter [IMP]
- traversing start control point of mitotic cell cycle [IMP]
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
PREY
DIS3
MTR17, RRP44, exosome catalytic subunit DIS3, L000003486, YOL021C
Exosome core complex catalytic subunit; has both endonuclease and 3'-5' exonuclease activity; involved in 3'-5' RNA processing and degradation in both the nucleus and the cytoplasm; role in degradation of tRNAs; has similarity to E. coli RNase R and to human DIS3; mutations in Dis3p corresponding to human mutations implicated in multiple myeloma cause phenotypes suggesting impaired exosome function; protein abundance increases in response to DNA replication stress
GO Process (12)
GO Function (3)
GO Component (5)
Gene Ontology Biological Process
- exonucleolytic trimming to generate mature 3'-end of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) [IMP]
- ncRNA 3'-end processing [IMP]
- nonfunctional rRNA decay [IMP]
- nuclear mRNA surveillance [IMP]
- nuclear polyadenylation-dependent CUT catabolic process [IMP]
- nuclear polyadenylation-dependent mRNA catabolic process [IC]
- nuclear polyadenylation-dependent rRNA catabolic process [IMP]
- nuclear polyadenylation-dependent tRNA catabolic process [IDA, IGI, IMP]
- nuclear-transcribed mRNA catabolic process, 3'-5' exonucleolytic nonsense-mediated decay [IC]
- nuclear-transcribed mRNA catabolic process, non-stop decay [IC]
- polyadenylation-dependent snoRNA 3'-end processing [IC]
- rRNA catabolic process [IMP]
Gene Ontology Molecular Function
Gene Ontology Cellular Component
Saccharomyces cerevisiae (S288c)
Synthetic Lethality
A genetic interaction is inferred when mutations or deletions in separate genes, each of which alone causes a minimal phenotype, result in lethality when combined in the same cell under a given condition.
Publication
The N-terminal PIN domain of the exosome subunit Rrp44 harbors endonuclease activity and tethers Rrp44 to the yeast core exosome.
Nuclear and cytoplasmic forms of the yeast exosome share 10 components, of which only Rrp44/Dis3 is believed to possess 3' exonuclease activity. We report that expression only of Rrp44 lacking 3'-exonuclease activity (Rrp44-exo) supports growth in S288c-related strains (BY4741). In BY4741, rrp44-exo was synthetic-lethal with loss of the cytoplasmic 5'-exonuclease Xrn1, indicating block of mRNA turnover, but not with loss ... [more]
Nucleic Acids Res. Mar. 01, 2009; 37(4);1127-40 [Pubmed: 19129231]
Throughput
- Low Throughput
Ontology Terms
- phenotype: inviable (APO:0000112)
Curated By
- BioGRID