title: p300 functions as a coactivator for the peroxisome proliferator-activated receptor alpha.
abstract: The integrator protein, p300, was demonstrated to interact with mouse peroxisome proliferator-activated receptor alpha in a ligand-enhanced manner. The PPARalpha-interacting domain of p300 was mapped to amino acids 39-117 which interacted strongly with PPARalpha but did not interact with retinoic acid receptor-gamma or retinoid X receptor-alpha. Amino acids within the carboxyl terminus of PPARalpha as well as residues within the hinge region were required for ligand-dependent interaction with p300. p300 enhanced the transcriptional activation properties of PPARalpha and, therefore, can be considered a bona fide coactivator for this nuclear receptor. These observations extend the group of p300-interacting proteins to include mPPARalpha and further characterize the molecular mechanisms of PPARalpha-mediated transcriptional regulation.
authors.affiliation: Program in Molecular and Cellular Biology, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, USA.
authors.forename: P
authors.initials: P
authors.lastname: Dowell
authors.forename: J E
authors.initials: JE
authors.lastname: Ishmael
authors.forename: D
authors.initials: D
authors.lastname: Avram
authors.forename: V J
authors.initials: VJ
authors.lastname: Peterson
authors.forename: D J
authors.initials: DJ
authors.lastname: Nevrivy
authors.forename: M
authors.initials: M
authors.lastname: Leid
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002273:Carcinogens / Q000494:pharmacology; D004247:DNA / Q000378:metabolism; D051548:Histone Acetyltransferases; D006801:Humans; D051379:Mice; D008830:Microbodies / Q000378:metabolism*; D008969:Molecular Sequence Data; D009687:Nuclear Proteins / Q000378:metabolism*; D056920:Nuclear Receptor Coactivator 1; D056921:Nuclear Receptor Coactivator 3; D011743:Pyrimidines; D018160:Receptors, Cytoplasmic and Nuclear / Q000378:metabolism*; D018168:Receptors, Retinoic Acid / Q000378:metabolism; D047488:Retinoid X Receptors; D012441:Saccharomyces cerevisiae; D015534:Trans-Activators / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*; D015533:Transcriptional Activation; D014407:Tumor Cells, Cultured
chemical_list: D002273:Carcinogens; D009687:Nuclear Proteins; D011743:Pyrimidines; D018160:Receptors, Cytoplasmic and Nuclear; D018168:Receptors, Retinoic Acid; D047488:Retinoid X Receptors; D015534:Trans-Activators; D014157:Transcription Factors; C006253:pirinixic acid; D004247:DNA; D051548:Histone Acetyltransferases; C538859:NCOA1 protein, human; C538866:NCOA3 protein, human; C538861:Ncoa1 protein, mouse; C538867:Ncoa3 protein, mouse; D056920:Nuclear Receptor Coactivator 1; D056921:Nuclear Receptor Coactivator 3