title: The yeast 14-3-3 proteins BMH1 and BMH2 differentially regulate rapamycin-mediated transcription.
abstract: 14-3-3 proteins are highly conserved and have been found in all eukaryotic organisms investigated. They are involved in many varied cellular processes, and interact with hundreds of other proteins. Among many other roles in cells, yeast 14-3-3 proteins have been implicated in rapamycin-mediated cell signalling. We determined the transcription profiles of bmh1 and bmh2 yeast after treatment with rapamycin. We found that, under these conditions, BMH1 and BMH2 are required for rapamycin-induced regulation of distinct, but overlapping sets of genes. Both Bmh1 and Bmh2 associate with the promoters of at least some of these genes. BMH2, but not BMH1, attenuates the repression of genes involved in some functions required for ribosome biogenesis. BMH2 also attenuates the activation of genes sensitive to nitrogen catabolite repression.
authors.affiliation: St. Lawrence University, 23 Romoda Drive, Canton, NY 13617, U.S.A.
authors.forename: Michael A
authors.initials: MA
authors.lastname: Trembley
authors.affiliation: St. Lawrence University, 23 Romoda Drive, Canton, NY 13617, U.S.A.
authors.forename: Hunter L
authors.initials: HL
authors.lastname: Berrus
authors.affiliation: St. Lawrence University, 23 Romoda Drive, Canton, NY 13617, U.S.A.
authors.forename: Jonathan R
authors.initials: JR
authors.lastname: Whicher
authors.affiliation: St. Lawrence University, 23 Romoda Drive, Canton, NY 13617, U.S.A. edixon@stlawu.edu.
authors.forename: Emily L
authors.initials: EL
authors.lastname: Humphrey-Dixon
mesh_terms: D048948:14-3-3 Proteins / Q000235:genetics / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism*; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*; D020123:Sirolimus / Q000494:pharmacology*; D014158:Transcription, Genetic / Q000187:drug effects*
chemical_list: D048948:14-3-3 Proteins; C075852:BMH1 protein, S cerevisiae; C097164:BMH2 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D020123:Sirolimus
keywords: 14-3-3; Bmh2; nitrogen catabolite repression (NCR); rapamycin; ribosome biogenesis; target of rapamycin (TOR)