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    Est1 and Cdc13 as comediators of telomerase access (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-03
    Description: Cdc13 and Est1 are single-strand telomeric DNA binding proteins that contribute to telomere replication in the yeast Saccharomyces cerevisiae. Here it is shown that fusion of Cdc13 to the telomerase-associated Est1 protein results in greatly elongated telomeres. Fusion proteins consisting of mutant versions of Cdc13 or Est1 confer similar telomere elongation, indicating that close physical proximity can bypass telomerase-defective mutations in either protein. Fusing Cdc13 directly to the catalytic core of telomerase allows stable telomere maintenance in the absence of Est1, consistent with a role for Est1 in mediating telomerase access. Telomere length homeostasis therefore is maintained in part by restricting access of telomerase to chromosome termini, but this limiting situation can be overcome by directly tethering telomerase to the telomere.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Evans, S K -- Lundblad, V -- R01GM55867/GM/NIGMS NIH HHS/ -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):117-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506558" target="_blank"〉PubMed〈/a〉
    Keywords: Binding Sites ; Cyclin B/genetics/*metabolism ; DNA, Fungal/metabolism ; DNA, Single-Stranded/metabolism ; Fungal Proteins/genetics/*metabolism ; Genetic Complementation Test ; Homeostasis ; Models, Biological ; Mutation ; Recombinant Fusion Proteins/metabolism ; Saccharomyces cerevisiae/genetics/growth & development/*metabolism ; *Saccharomyces cerevisiae Proteins ; Telomerase/genetics/*metabolism ; Telomere/*metabolism
    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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  • 2
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    Cdc13p: a single-strand telomeric DNA-binding protein with a dual role in yeast telomere maintenance (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-10-11
    Description: The CDC13 gene has previously been implicated in the maintenance of telomere integrity in Saccharomyces cerevisiae. With the use of two classes of mutations, here it is shown that CDC13 has two discrete roles at the telomere. The cdc13-2est mutation perturbs a function required in vivo for telomerase regulation but not in vitro for enzyme activity, whereas cdc13-1ts defines a separate essential role at the telomere. In vitro, purified Cdc13p binds to single-strand yeast telomeric DNA. Therefore, Cdc13p is a telomere-binding protein required to protect the telomere and mediate access of telomerase to the chromosomal terminus.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nugent, C I -- Hughes, T R -- Lue, N F -- Lundblad, V -- New York, N.Y. -- Science. 1996 Oct 11;274(5285):249-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular and Human Genetics and Cell and Molecular Biology Program, Baylor College of Medicine, Houston, TX 77030, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8824190" target="_blank"〉PubMed〈/a〉
    Keywords: Alleles ; Base Sequence ; Cloning, Molecular ; Cyclin B ; Cyclins/genetics/*metabolism ; DNA, Fungal/metabolism ; DNA, Single-Stranded/metabolism ; DNA-Binding Proteins/*metabolism ; Fungal Proteins/genetics ; Genes, Fungal ; Molecular Sequence Data ; Mutation ; Phenotype ; Saccharomyces cerevisiae/genetics/*metabolism ; *Saccharomyces cerevisiae Proteins ; Telomerase/genetics/*metabolism ; Telomere/*metabolism
    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)
    Location Call Number Expected Availability
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    PAPER CURRENT
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