title: Expression cloning of a zinc-finger cyclic AMP-response-element-binding protein.
abstract: In response to specific extracellular signals, intracellular cyclic AMP levels increase, leading to a variety of responses including the alteration of transcription of many eukaryotic genes. This transcriptional effect is frequently mediated through the cyclic AMP-response element (CRE) motif T(T/G)ACGTCA. Using an expression screening approach we have cloned a yeast gene, MSN2, that encodes a 78 kDa protein that recognizes this consensus CRE motif. Phosphorylation of the MSN2 protein by the catalytic subunit of protein kinase A stimulates DNA binding in vitro. Two putative Cys2His2-type zinc fingers present in the C-terminal 79 amino acids of the MSN2 protein are sufficient to confer CRE-binding specificity. Therefore, MSN2 represents a novel CRE-binding protein distinct from the multiple previously characterized basic region-leucine zipper repeat CRE-binding proteins.
mesh_terms: D010582:Bacteriophage lambda / Q000235:genetics; D003001:Cloning, Molecular; D017362:Cyclic AMP Response Element-Binding Protein / Q000235:genetics* / Q000378:metabolism; D017868:Cyclic AMP-Dependent Protein Kinases / Q000378:metabolism; D004247:DNA / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D005656:Fungal Proteins / Q000235:genetics* / Q000378:metabolism; D015870:Gene Expression / Q000235:genetics; D007544:Isopropyl Thiogalactoside / Q000378:metabolism; D010766:Phosphorylation; D015183:Restriction Mapping; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D015003:Yeasts / Q000737:chemistry* / Q000235:genetics; D016335:Zinc Fingers / Q000235:genetics*
chemical_list: D017362:Cyclic AMP Response Element-Binding Protein; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; C081935:MSN2 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D007544:Isopropyl Thiogalactoside; D004247:DNA; D017868:Cyclic AMP-Dependent Protein Kinases