Mutational analysis of the Saccharomyces cerevisiae general regulatory factor CP1
UMass Chan Affiliations
Department of Molecular Genetics and MicrobiologyGraduate School of Biomedical Sciences
Document Type
Journal ArticlePublication Date
1993-08-25Keywords
Alleles; Base Sequence; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; DNA Mutational Analysis; DNA, Fungal; DNA-Binding Proteins; Frameshift Mutation; Fungal Proteins; Molecular Sequence Data; Mutagenesis; Phenotype; Saccharomyces cerevisiae; *Saccharomyces cerevisiae Proteins; Transformation, GeneticLife Sciences
Medicine and Health Sciences
Metadata
Show full item recordAbstract
The Saccharomyces cerevisiae general regulatory factor CP1, a helix-loop-helix protein that binds the centromere DNA element I (CDEI) of yeast centromeres, is required in yeast for optimal centromere function and for methionine prototrophy. Mutant alleles of CEP1, the gene encoding CP1, were generated by linker insertion, 5'- and 3'-deletion, and random mutagenesis and assayed for DNA binding activity and their ability to confer CP1 function when expressed in yeast. A heterologous CDEI-binding protein, TFEB, was also tested for CP1 function. The results suggested that DNA binding is required for both biological functions of CP1 but is not sufficient. A direct and quantitative correlation was observed between the chromosome loss and nutritional (i.e., Met) phenotypes of strains carrying loss of function alleles, but qualitatively the chromosome loss phenotype was more sensitive to decreased CP1 expression. The data are consistent with a model in which CP1 performs the same general chromatin-related function at centromeres and MET gene promoters and is normally present in functional excess.Source
Nucleic Acids Res. 1993 Aug 25;21(17):4133-41. Link to article on publisher's websiteDOI
10.1093/nar/21.17.4133Permanent Link to this Item
http://hdl.handle.net/20.500.14038/34154PubMed ID
8371988Related Resources
Link to article in PubMedae974a485f413a2113503eed53cd6c53
10.1093/nar/21.17.4133