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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zakian, V. A. Wellinger, R. J. |
| Description | Author Affiliation: Wellinger RJ ( Fred Hutchinson Cancer Research Center, Seattle, WA 98104.); |
| Abstract | In the yeast Saccharomyces cerevisiae, origins of replication (autonomously replicating sequences; ARSs), centromeres, and telomeres have been isolated and characterized. The identification of these structures allows the construction of artificial chromosomes in which the architecture of eukaryotic chromosomes may be studied. A common feature of most, and possibly all, natural yeast chromosomes is that they have an ARS within 2 kilobases of their physical ends. To study the effects of such telomeric ARSs on chromosome maintenance, we introduced artificial chromosomes of approximately 15 and 60 kilobases into yeast cells and analyzed the requirements for telomeric ARSs and the effects of ARS-free chromosomal arms on the stability of these molecules. We find that terminal blocks of telomeric repeats are sufficient to be recognized as telomeres. Moreover, artificial chromosomes containing telomere-associated Y' sequences and telomeric ARSs were no more stable during both mitosis and meiosis than artificial chromosomes lacking terminal ARSs, indicating that yeast-specific blocks of telomeric sequences are the only cis-acting requirement for a functional telomere during both mitotic growth and meiosis. The results also show that there is no requirement for an origin of replication on each arm of the artificial chromosomes, indicating that a replication fork may efficiently move through a functional centromere region. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 3 |
| Volume Number | 86 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1989-03-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Chromosomes Physiology DNA Replication Saccharomyces Cerevisiae Genetics Blotting, Southern Chromosomes, Fungal Cloning, Molecular Genetic Vectors Meiosis Plasmids Cytology Transformation, Genetic Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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