title: The bacteriophage 434 operator/repressor system in yeast.
abstract: The ability of the bacteriophage 434 operator/repressor system to function in a eukaryotic cell has been explored. An idealized 434 operator was placed at various positions in the PGK promoter of Saccharomyces cerevisiae: within the upstream activator sequence, close to the TATA box, and downstream of the transcription-initiation site. Expression of the 434 cI gene from a 2 microns-based plasmid resulted in significant repression of gene expression from constructs containing the altered promoters linked to a beta-galactosidase reporter gene. Attempts to use a variant of the 434 repressor that has the binding specificity of the P22 repressor (434P22) were unsuccessful, due to a severely inhibitory effect of this gene-product on the growth of the yeast cells.
mesh_terms: D017100:Bacteriophage P22 / Q000235:genetics*; D001483:Base Sequence; D003001:Cloning, Molecular / Q000379:methods*; D003090:Coliphages / Q000235:genetics*; D004268:DNA-Binding Proteins; D005656:Fungal Proteins / Q000235:genetics*; D005800:Genes, Fungal; D005814:Genes, Viral; D005822:Genetic Vectors / Q000235:genetics*; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D009875:Operator Regions, Genetic; D010735:Phosphoglycerate Kinase / Q000235:genetics*; D011401:Promoter Regions, Genetic; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D012097:Repressor Proteins / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology*; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000254:growth & development; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins; D001616:beta-Galactosidase / Q000096:biosynthesis
chemical_list: D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D011993:Recombinant Fusion Proteins; D012097:Repressor Proteins; D014764:Viral Proteins; D054334:Viral Regulatory and Accessory Proteins; C016649:phage repressor proteins; D010735:Phosphoglycerate Kinase; D001616:beta-Galactosidase