BAIT

GAL3

transcriptional regulator GAL3, L000000660, YDR009W
Transcriptional regulator; involved in activation of the GAL genes in response to galactose; forms a complex with Gal80p to relieve Gal80p inhibition of Gal4p; binds galactose and ATP but does not have galactokinase activity; GAL3 has a paralog, GAL1, that arose from the whole genome duplication
GO Process (3)
GO Function (1)
GO Component (2)
Saccharomyces cerevisiae (S288c)
PREY

GAL1

galactokinase, L000000658, YBR020W
Galactokinase; phosphorylates alpha-D-galactose to alpha-D-galactose-1-phosphate in the first step of galactose catabolism; expression regulated by Gal4p; GAL1 has a paralog, GAL3, that arose from the whole genome duplication
GO Process (3)
GO Function (1)
GO Component (1)
Saccharomyces cerevisiae (S288c)

Synthetic Growth Defect

A genetic interaction is inferred when mutations in separate genes, each of which alone causes a minimal phenotype, result in a significant growth defect under a given condition when combined in the same cell.

Publication

Stochastic galactokinase expression underlies GAL gene induction in a GAL3 mutant of Saccharomyces cerevisiae.

Kar RK, Qureshi MT, Dasadhikari AK, Zahir T, Venkatesh KV, Bhat PJ

GAL1 and GAL3 are paralogous signal transducers that functionally inactivate Gal80p to activate the Gal4p-dependent transcriptional activation of GAL genes in Saccharomyces cerevisiae in response to galactose. Unlike a wild-type strain, the gal3∆ strain shows delayed growth kinetics as a result of the signaling function of GAL1. The mechanism ensuring that GAL1 is eventually expressed to turn on the GAL switch ... [more]

FEBS J. Apr. 01, 2014; 281(7);1798-1817 [Pubmed: 24785355]

Throughput

  • Low Throughput

Ontology Terms

  • phenotype: utilization of carbon source (APO:0000098)
  • phenotype: vegetative growth (APO:0000106)

Additional Notes

  • the fraction of gal3 mutant cells able to grow on galactose is abolished when gal1 is also deleted (gal1 gal3 mutants cannot grow on galactose medium)

Related interactions

InteractionExperimental Evidence CodeDatasetThroughputScoreCurated ByNotes
GAL3 GAL1
Dosage Rescue
Dosage Rescue

A genetic interaction is inferred when over expression or increased dosage of one gene rescues the lethality or growth defect of a strain that is mutated or deleted for another gene.

Low-BioGRID
160883
GAL1 GAL3
Negative Genetic
Negative Genetic

Mutations/deletions in separate genes, each of which alone causes a minimal phenotype, but when combined in the same cell results in a more severe fitness defect or lethality under a given condition. This term is reserved for high or low throughput studies with scores.

Low-1.53BioGRID
560414
GAL3 GAL1
Phenotypic Enhancement
Phenotypic Enhancement

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

Low-BioGRID
156243
GAL3 GAL1
Phenotypic Suppression
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.

Low-BioGRID
939323
GAL1 GAL3
Synthetic Rescue
Synthetic Rescue

A genetic interaction is inferred when mutations or deletions of one gene rescues the lethality or growth defect of a strain mutated or deleted for another gene.

Low-BioGRID
268336

Curated By

  • BioGRID