Reference: Kataoka T, et al. (1984) Genetic analysis of yeast RAS1 and RAS2 genes. Cell 37(2):437-45

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Abstract


We present a genetic analysis of RAS1 and RAS2 of S. cerevisiae, two genes that are highly homologous to mammalian ras genes. By constructing in vitro ras genes disrupted by selectable genes and introducing these by gene replacement into the respective ras loci, we have determined that neither RAS1 nor RAS2 are by themselves essential genes. However, ras1 - ras2 - spores of doubly heterozygous diploids are incapable of resuming vegetative growth. We have determined that RAS1 is located on chromosome XV, 7 cM from ade2 and 63 cM from his3; and RAS2 is located on chromosome XIV, 2 cM from met4 . We have also constructed by site-directed mutagenesis a missense mutant, RAS2val19 , which encodes valine in place of glycine at the nineteenth amino acid position, the same sort of missense mutation that is found in some transforming alleles of mammalian ras genes. Diploid yeast cells that contain this mutation are incapable of sporulating efficiently, even when they contain wild-type alleles.

Reference Type
Comparative Study | Journal Article | Research Support, Non-U.S. Gov't | Research Support, U.S. Gov't, P.H.S.
Authors
Kataoka T, Powers S, McGill C, Fasano O, Strathern J, Broach J, Wigler M
Primary Lit For
RAS1 | RAS2
Additional Lit For
HIS3 | MET4 | RAS2-val19

Gene Ontology Annotations 1 entry for 1 gene


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Gene/ComplexQualifierGene Ontology TermAnnotation ExtensionEvidenceSourceAssigned On
RAS1enablesGTPase activityIMPSGD2013-08-07
Showing 1 to 1 of 1 entries

Phenotype Annotations 3 entries for 2 genes


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GenePhenotypeExperiment TypeMutant InformationStrain BackgroundChemicalDetails
RAS2sporulation efficiency: decreased
heterozygous diploidactivation
Allele: RAS2-val19

G19V; impaired GTPase activity; dominant allele locked in the activated state; analogous to G12V in oncogenic forms of human Ras

OtherDetails: 500-fold or greater reduction in sporulation efficiency; diploids arrest in the unbudded state
RAS1viable
classical geneticsnull
Allele: ras1-Δ
Other
RAS2viable
classical geneticsnull
Allele: ras2-Δ
S288C
Showing 1 to 3 of 3 entries

Interaction Annotations


Genetic Interactions

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Interactor Interactor Allele Assay Annotation Action Phenotype SGA score P-value Source Reference

Physical Interactions 0 entries for 0 genes

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InteractorInteractorAssayAnnotationActionModification
No physical interaction data for Kataoka T, et al. (1984)
Showing 0 to 0 of 0 entries