title: A direct physical association between ETS and AP-1 transcription factors in normal human T cells.
abstract: The Ets and AP-1 families of transcription factors bind distinct DNA elements and subserve diverse functions in multiple lymphoid and nonlymphoid cell types. Functionally important Ets and AP-1 binding sites have been identified in a large number of enhancer elements, suggesting important cooperative interactions between these two families of transcription factors. In this report, we have demonstrated a direct physical interaction between Ets and AP-1 proteins both in vitro and in activated human T cells. This interaction is mediated by the binding of the basic domain of Jun to the Ets domain of Ets proteins. Jun, in association with Ets, is capable of interacting with Fos family members to form a trimolecular protein complex. The physical association between Ets-1 and AP-1 proteins is required for the transcriptional activity of enhancer elements containing adjacent Ets and AP-1 binding sites. We conclude that direct physical interactions between Ets and AP-1 transcription factors play an important role in regulating mammalian gene expression.
authors.affiliation: Department of Medicine, University of Chicago, Illinois 60637, USA.
authors.forename: A G
authors.initials: AG
authors.lastname: Bassuk
authors.forename: J M
authors.initials: JM
authors.lastname: Leiden
mesh_terms: D000818:Animals; D001665:Binding Sites; D004247:DNA / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000378:metabolism*; D006801:Humans; D046911:Macromolecular Substances; D051379:Mice; D009687:Nuclear Proteins; D011485:Protein Binding; D050784:Proto-Oncogene Protein c-ets-1; D011518:Proto-Oncogene Proteins / Q000378:metabolism*; D050783:Proto-Oncogene Proteins c-ets; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism*; D013329:Structure-Activity Relationship; D013601:T-Lymphocytes / Q000378:metabolism*; D018808:Transcription Factor AP-1 / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*
chemical_list: D004268:DNA-Binding Proteins; C512897:ELF1 protein, human; C494041:ETS1 protein, human; C512896:Elf1 protein, mouse; C494042:Ets1 protein, mouse; D046911:Macromolecular Substances; D009687:Nuclear Proteins; D050784:Proto-Oncogene Protein c-ets-1; D011518:Proto-Oncogene Proteins; D050783:Proto-Oncogene Proteins c-ets; D016755:Proto-Oncogene Proteins c-jun; D018808:Transcription Factor AP-1; D014157:Transcription Factors; D004247:DNA