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  • 1
    Publication Date: 2004-11-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baumeister, Wolfgang -- Bachmair, Andreas -- Chau, Vincent -- Cohen, Robert -- Coffino, Phil -- Demartino, George -- Deshaies, Raymond -- Dohmen, Juergen -- Emr, Scott -- Finley, Daniel -- Hampton, Randy -- Hill, Christopher -- Hochstrasser, Mark -- Huber, Robert -- Jackson, Peter -- Jentsch, Stefan -- Johnson, Erica -- Kwon, Yong Tae -- Pagano, Michele -- Pickart, Cecile -- Rechsteiner, Martin -- Scheffner, Martin -- Sommer, Thomas -- Tansey, William -- Tyers, Mike -- Vierstra, Richard -- Weissman, Allan -- Wilkinson, Keith D -- Wolf, Dieter -- New York, N.Y. -- Science. 2004 Nov 19;306(5700):1290-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15550643" target="_blank"〉PubMed〈/a〉
    Keywords: History, 20th Century ; History, 21st Century ; Nobel Prize ; Proteasome Endopeptidase Complex/*metabolism ; Proteins/metabolism ; Ubiquitin/*metabolism ; Ubiquitin-Protein Ligase Complexes/genetics/*metabolism ; United States
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2011-09-09
    Description: Polyamines are essential organic polycations with multiple cellular functions relevant for cell division, cancer and ageing. Regulation of polyamine synthesis is mainly achieved by controlling the activity of ornithine decarboxylase (ODC) through an unusual mechanism involving ODC antizyme, the binding of which disrupts homodimeric ODC and targets it for ubiquitin-independent degradation by the 26S proteasome. Whereas mammals express several antizyme genes, we have identified a single orthologue, termed OAZ1, in Saccharomyces cerevisiae. Similar to its mammalian counterparts, OAZ1 synthesis is induced with rising intracellular polyamine concentrations, which also inhibit ubiquitin-dependent degradation of the OAZ1 protein. Together, these mechanisms contribute to a homeostatic feedback regulation of polyamines. Antizyme synthesis involves a conserved +1 ribosomal frameshifting (RFS) event at an internal STOP codon during decoding of its messenger RNA. Here we used S. cerevisiae OAZ1 to dissect the enigmatic mechanism underlying polyamine regulation of RFS. In contrast with previous assumptions, we report here that the nascent antizyme polypeptide is the relevant polyamine sensor that operates in cis to negatively regulate upstream RFS on the polysomes, where its own mRNA is being translated. At low polyamine levels, the emerging antizyme polypeptide inhibits completion of its synthesis causing a ribosome pile-up on antizyme mRNA, whereas polyamine binding to nascent antizyme promotes completion of its synthesis. Thus, our study reveals a novel autoregulatory mechanism, in which binding of a small metabolite to a nascent sensor protein stimulates the latter's synthesis co-translationally.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kurian, Leo -- Palanimurugan, R -- Godderz, Daniela -- Dohmen, R Jurgen -- England -- Nature. 2011 Sep 7;477(7365):490-4. doi: 10.1038/nature10393.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Genetics, University of Cologne, Cologne Biocenter, Zulpicher Strasse 47a, D-50674 Cologne, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21900894" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Sequence ; Frameshifting, Ribosomal ; Molecular Sequence Data ; Ornithine Decarboxylase/metabolism ; Polyamines/analysis/*metabolism ; Proteins/chemistry/*genetics/*metabolism ; RNA, Messenger/*genetics/metabolism ; Ribosomes/metabolism ; *Saccharomyces cerevisiae/enzymology/genetics/metabolism ; Saccharomyces cerevisiae Proteins/biosynthesis/chemistry/*genetics/*metabolism ; Sequence Alignment ; Ubiquitin/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1994-03-04
    Description: A temperature-sensitive (ts) mutant retains the function of a gene at a low (permissive) temperature but not at a high (nonpermissive) temperature. Arg-DHFR, a dihydrofolate reductase bearing an amino-terminal (N-terminal) arginine, is long-lived in the yeast Saccharomyces cerevisiae, even though arginine is a destabilizing residue in the N-end rule of protein degradation. A ts derivative of Arg-DHFR was identified that is long-lived at 23 degrees C but rapidly degraded by the N-end rule pathway at 37 degrees C. Fusions of ts Arg-DHFR to either Ura3 or Cdc28 of S. cerevisiae confer ts phenotypes specific for these gene products. Thus, Arg-DHFRts is a heat-inducible degradation signal that can be used to produce ts mutants without a search for ts mutations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dohmen, R J -- Wu, P -- Varshavsky, A -- New York, N.Y. -- Science. 1994 Mar 4;263(5151):1273-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Biology, California Institute of Technology, Pasadena 91125.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8122109" target="_blank"〉PubMed〈/a〉
    Keywords: CDC28 Protein Kinase, S cerevisiae/genetics/metabolism ; Fungal Proteins/*genetics/metabolism ; Half-Life ; Hot Temperature ; *Mutagenesis ; Phenotype ; Recombinant Fusion Proteins/*metabolism ; Saccharomyces cerevisiae/genetics ; Temperature ; Tetrahydrofolate Dehydrogenase/*genetics/metabolism ; Ubiquitins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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