Cloned yeast and mammalian transcription factor TFIID gene products support basal but not activated metallothionein gene transcription.
Transcription factor IID (TFIID), the "TATA binding factor," is thought to play a key role in the regulation of eukaryotic transcriptional initiation. We have studied the role of TFIID in the transcription of the yeast metallothionein gene, which is regulated by the copper-dependent activator protein ACE1. Both basal and induced transcription of the metallothionein gene require TFIID and a functional TATA binding site. Crude human and mouse TFIID fractions, prepared from mammalian cells, respond to stimulation by ACE1. In contrast, human and yeast TFIID proteins expressed from the cloned genes do not respond to ACE1, except in the presence of wheat germ or yeast total cell extracts. These results indicate that the cloned TFIID gene products lack a component(s) or modification(s) that is required for regulated as compared to basal transcription.
Kambadur
R
R
Laboratory of Biochemistry, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
Culotta
V
V
Hamer
D
D
D000818:Animals; D001483:Base Sequence; D001665:Binding Sites; D003001:Cloning, Molecular; D005786:Gene Expression Regulation; D005796:Genes; D005800:Genes, Fungal; D006801:Humans; D008668:Metallothionein / Q000235:genetics*; D051379:Mice; D008957:Models, Genetic; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D011994:Recombinant Proteins / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D016385:TATA Box; D035362:Transcription Factor TFIID; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D014158:Transcription, Genetic
D011994:Recombinant Proteins; D035362:Transcription Factor TFIID; D014157:Transcription Factors; D008668:Metallothionein