BAIT
HMO1
HSM2, L000003234, YDR174W
Chromatin associated high mobility group (HMG) family member; involved in compacting, bending, bridging and looping DNA; rDNA-binding component that regulates transcription from RNA polymerase I promoters; regulates start site selection of ribosomal protein genes via RNA polymerase II promoters; role in genome maintenance; associates with a 5'-3' DNA helicase and Fpr1p, a prolyl isomerase; relocalizes to the cytosol in response to hypoxia
GO Process (6)
GO Function (3)
GO Component (6)
Gene Ontology Biological Process
- DNA packaging [IDA]
- chromatin organization involved in regulation of transcription [IDA]
- dsDNA loop formation [IDA]
- regulation of ribosomal protein gene transcription from RNA polymerase II promoter [IGI, IMP]
- regulation of transcription from RNA polymerase I promoter [IGI, IMP]
- transcriptional start site selection at RNA polymerase II promoter [IMP]
Gene Ontology Molecular Function
Saccharomyces cerevisiae (S288c)
PREY
IFH1
L000001775, YLR223C
Coactivator, regulates transcription of ribosomal protein (RP) genes; recruited to RP gene promoters during optimal growth conditions via Fhl1p; subunit of CURI, a complex that coordinates RP production and pre-rRNA processing; regulated by acetylation and phosphorylation at different growth states via TORC1 signaling; IFH1 has a paralog, CRF1, that arose from the whole genome duplication
GO Process (2)
GO Function (1)
GO Component (4)
Gene Ontology Biological Process
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
Hmo1 is required for TOR-dependent regulation of ribosomal protein gene transcription.
Ribosome biogenesis requires equimolar amounts of four rRNAs and all 79 ribosomal proteins (RP). Coordinated regulation of rRNA and RP synthesis by eukaryotic RNA polymerases (Pol) I, III, and II is a key requirement for growth control. Using a novel global genetic approach, we showed that the absence of Hmo1 becomes lethal when combined with mutations of components of either ... [more]
Mol. Cell. Biol. Nov. 01, 2007; 27(22);8015-26 [Pubmed: 17875934]
Throughput
- Low Throughput
Ontology Terms
- phenotype: inviable (APO:0000112)
Additional Notes
- mild depletion of Ifh1 results in no detectable growth defect in wild-type cells or in an FPR1 deletion background but is fully lethal in the absence of Hmo1
Curated By
- BioGRID