Two transcription factors, Gln3p and Nil1p, use the same GATAAG sites to activate the expression of GAP1 of Saccharomyces cerevisiae.
We present an analysis of the DNA region located upstream of GAP1, the structural gene for the general amino acid permease, which contains the sites required for activation of transcription of this gene in response to the nitrogen source of the growth medium. This gene is not expressed in media containing glutamine, and its transcription is activated in response to Gln3p in cells using glutamate as the source of nitrogen and by Nil1p in cells using urea as the source of nitrogen. We show that full response to both activators requires the presence of two GATAAG sites, as well as the presence of auxiliary sites located in the interval between 602 and 453 bp from the translational start site. The fact that both Gln3p and Nil1p utilize GATAAG sites to activate transcription is reflected in the high homology of the zinc finger regions of the two proteins.
Stanbrough
M
M
Department of Biology, Massachusetts Institute of Technology, Cambridge 02139, USA.
Magasanik
B
B
D026905:Amino Acid Transport Systems; D001483:Base Sequence; D004252:DNA Mutational Analysis; D004268:DNA-Binding Proteins / Q000378:metabolism*; D005656:Fungal Proteins / Q000378:metabolism*; D050980:GATA Transcription Factors; D015966:Gene Expression Regulation, Fungal; D026901:Membrane Transport Proteins / Q000096:biosynthesis / Q000235:genetics*; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D012097:Repressor Proteins; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors / Q000378:metabolism*; D001616:beta-Galactosidase / Q000096:biosynthesis / Q000235:genetics
D026905:Amino Acid Transport Systems; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; C096100:GAT1 protein, S cerevisiae; D050980:GATA Transcription Factors; C071664:GLN3 protein, S cerevisiae; D026901:Membrane Transport Proteins; D011993:Recombinant Fusion Proteins; D012097:Repressor Proteins; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D001616:beta-Galactosidase