Transcription in yeast activated by a putative amphipathic α helix linked to a DNA binding unit View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1987-12

AUTHORS

Edward Giniger, Mark Ptashne

ABSTRACT

Gene activation by a DNA-binding regulatory protein in yeast requires the protein to have two components: one to recognize a specific DNA sequence and a second, the 'activating region', to interact with a general transcription factor or perhaps with RNA polymerase1,2. The activating regions that have been characterized are acidic3,4, and mutational analysis of one indicates that this acidity is important for activity6. Here we report the design of an artificial protein bearing a novel 15-amino acid peptide linked to a DNA binding fragment of the yeast regulatory protein GAL4 (refs 7–10). The synthetic peptide is acidic and should it form an α-helix, that helix would be amphipathic, having one hydrophilic face bearing the acidic residues, and one hydrophobic face11. When expressed in yeast, the artificial protein bearing this peptide efficiently activates the GAL1 gene which is ordinarily activated by GAL4 (refs 12, 13). An otherwise identical protein with the novel 15 amino acids in a scrambled order, and which is thus unable to form an amphipathic structure, does not activate GAL1 transcription. More... »

PAGES

670-672

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/330670a0

DOI

http://dx.doi.org/10.1038/330670a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1017972072

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/3317067


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