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  • 1
    Electronic Resource
    Electronic Resource
    Relationships amongOmphalotus species (Paxillaceae) based on restriction sites in the ribosomal ITS1-5.8S-ITS2 region (1998)
    Springer
    Plant systematics and evolution 211 (1998), S. 231-237 
    Details
    ISSN: 1615-6110
    Keywords: Fungi ; Basidiomycetes ; Paxillaceae ; Omphalotus ; Restriction fragment length polymorphisms (RFLP) ; ribosomal DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic relationships for several species of the fungusOmphalotus were estimated by comparing the presence or absence of restriction sites in the ITS1-5.8S-ITS2 region of nuclear ribosomal DNA. Results placeO. olearius, O. subilludens andO. olivascens in a single clade.Omphalotus illudens, usually thought to be related toO. subilludens, was placed in a second clade, more closely related toO. nidiformis. Omphalotus mexicana is distinct from all other examinedOmphalotus species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985361
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  • 2
    Electronic Resource
    Electronic Resource
    Mating systems inOmphalotus (Paxillaceae, Agaricales) (1998)
    Springer
    Plant systematics and evolution 211 (1998), S. 217-229 
    Details
    ISSN: 1615-6110
    Keywords: Fungi ; Basidiomycetes ; Paxillaceae ; Omphalotus ; Mating systems ; speciation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pairings of monokaryon cultures representingOmphalotus illudens (eastern North America),O. nidiformis (southeastern Australia),O. olearius (southern Europe),O. olivascens (North American Pacific coast), andO. subilludens (southern North America) showed widely variable compatibility patterns.Omphalotus olearius ×O. subilludens ×O. olivascens showed high compatibility, whileO. illudens was significantly less compatible with all other taxa. Isolates ofOmphalotus nidiformis represented an almost genetically isolated biological species. The role of partial compatibility in nomenclatural ranking is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985360
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  • 3
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    Genetic selection of peptide inhibitors of biological pathways (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-07-27
    Description: Genetic selections were used to find peptides that inhibit biological pathways in budding yeast. The peptides were presented inside cells as peptamers, surface loops on a highly expressed and biologically inert carrier protein, a catalytically inactive derivative of staphylococcal nuclease. Peptamers that inhibited the pheromone signaling pathway, transcriptional silencing, and the spindle checkpoint were isolated. Putative targets for the inhibitors were identified by a combination of two-hybrid analysis and genetic dissection of the target pathways. This analysis identified Ydr517w as a component of the spindle checkpoint and reinforced earlier indications that Ste50 has both positive and negative roles in pheromone signaling. Analysis of transcript arrays showed that the peptamers were highly specific in their effects, which suggests that they may be useful reagents in organisms that lack sophisticated genetics as well as for identifying components of existing biological pathways that are potential targets for drug discovery.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Norman, T C -- Smith, D L -- Sorger, P K -- Drees, B L -- O'Rourke, S M -- Hughes, T R -- Roberts, C J -- Friend, S H -- Fields, S -- Murray, A W -- P41-RR11823/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1999 Jul 23;285(5427):591-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of California, San Francisco, CA 94143-0444, USA. tnorman@microbia.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10417390" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Calcium-Calmodulin-Dependent Protein Kinases/metabolism ; Fungal Proteins/metabolism ; G1 Phase ; Galactose/metabolism ; Lipoproteins/metabolism ; Micrococcal Nuclease ; Mitosis ; Molecular Sequence Data ; Peptide Library ; Peptides/genetics/metabolism/*pharmacology ; Pheromones/*metabolism ; Protein Binding ; Protein-Serine-Threonine Kinases ; Protein-Tyrosine Kinases ; Saccharomyces cerevisiae/cytology/genetics/*metabolism ; *Saccharomyces cerevisiae Proteins ; *Selection, Genetic ; *Signal Transduction ; Spindle Apparatus/drug effects/*metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    GTBP, a 160-kilodalton protein essential for mismatch-binding activity in human cells (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-06-30
    Description: DNA mismatch recognition and binding in human cells has been thought to be mediated by the hMSH2 protein. Here it is shown that the mismatch-binding factor consists of two distinct proteins, the 100-kilodalton hMSH2 and a 160-kilodalton polypeptide, GTBP (for G/T binding protein). Sequence analysis identified GTBP as a new member of the MutS homolog family. Both proteins are required for mismatch-specific binding, a result consistent with the finding that tumor-derived cell lines devoid of either protein are also devoid of mismatch-binding activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Palombo, F -- Gallinari, P -- Iaccarino, I -- Lettieri, T -- Hughes, M -- D'Arrigo, A -- Truong, O -- Hsuan, J J -- Jiricny, J -- New York, N.Y. -- Science. 1995 Jun 30;268(5219):1912-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Istituto di Ricerche di Biologia Molecolare P. Angeletti, Pomezia, Italy.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7604265" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Base Composition ; Base Sequence ; Cloning, Molecular ; Colorectal Neoplasms ; *DNA Repair/genetics ; DNA, Neoplasm/*metabolism ; DNA-Binding Proteins/chemistry/genetics/*metabolism ; HeLa Cells ; Humans ; Molecular Sequence Data ; Molecular Weight ; Nucleic Acid Heteroduplexes/*metabolism ; Sequence Analysis ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Reverse transcriptase motifs in the catalytic subunit of telomerase (1997)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1997-04-25
    Description: Telomerase is a ribonucleoprotein enzyme essential for the replication of chromosome termini in most eukaryotes. Telomerase RNA components have been identified from many organisms, but no protein component has been demonstrated to catalyze telomeric DNA extension. Telomerase was purified from Euplotes aediculatus, a ciliated protozoan, and one of its proteins was partially sequenced by nanoelectrospray tandem mass spectrometry. Cloning and sequence analysis of the corresponding gene revealed that this 123-kilodalton protein (p123) contains reverse transcriptase motifs. A yeast (Saccharomyces cerevisiae) homolog was found and subsequently identified as EST2 (ever shorter telomeres), deletion of which had independently been shown to produce telomere defects. Introduction of single amino acid substitutions within the reverse transcriptase motifs of Est2 protein led to telomere shortening and senescence in yeast, indicating that these motifs are important for catalysis of telomere elongation in vivo. In vitro telomeric DNA extension occurred with extracts from wild-type yeast but not from est2 mutants or mutants deficient in telomerase RNA. Thus, the reverse transcriptase protein fold, previously known to be involved in retroviral replication and retrotransposition, is essential for normal chromosome telomere replication in diverse eukaryotes.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lingner, J -- Hughes, T R -- Shevchenko, A -- Mann, M -- Lundblad, V -- Cech, T R -- AG11728/AG/NIA NIH HHS/ -- New York, N.Y. -- Science. 1997 Apr 25;276(5312):561-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309-0215, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/9110970" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Binding Sites ; Catalysis ; Chromosomes/metabolism ; DNA, Fungal/metabolism ; DNA-Binding Proteins ; Euplotes/*enzymology ; Evolution, Molecular ; Fungal Proteins/chemistry/metabolism ; Genes, Fungal ; Genes, Protozoan ; Molecular Sequence Data ; Protein Conformation ; *Rna ; RNA, Fungal/metabolism ; RNA, Protozoan/metabolism ; RNA-Directed DNA Polymerase/*chemistry/metabolism ; Saccharomyces cerevisiae/enzymology ; Saccharomyces cerevisiae Proteins ; Sequence Alignment ; Telomerase/*chemistry/genetics/isolation & purification/metabolism ; Telomere/metabolism ; Templates, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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