Analysis of the <i>Xenopus</i> Werner syndrome protein in DNA double-strand break repair
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- Hong Yan
- Fox Chase Cancer Center, Philadelphia, PA 19111
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- Jill McCane
- Fox Chase Cancer Center, Philadelphia, PA 19111
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- Thomas Toczylowski
- Fox Chase Cancer Center, Philadelphia, PA 19111
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- Chinyi Chen
- Fox Chase Cancer Center, Philadelphia, PA 19111
抄録
<jats:p>Werner syndrome is associated with premature aging and increased risk of cancer. Werner syndrome protein (WRN) is a RecQ-type DNA helicase, which seems to participate in DNA replication, double-strand break (DSB) repair, and telomere maintenance; however, its exact function remains elusive. Using Xenopus egg extracts as the model system, we found that Xenopus WRN (xWRN) is recruited to discrete foci upon induction of DSBs. Depletion of xWRN has no significant effect on nonhomologous end-joining of DSB ends, but it causes a significant reduction in the homology-dependent single-strand annealing DSB repair pathway. These results provide the first direct biochemical evidence that links WRN to a specific DSB repair pathway. The assay for single-strand annealing that was developed in this study also provides a powerful biochemical system for mechanistic analysis of homology-dependent DSB repair.</jats:p>
収録刊行物
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- The Journal of Cell Biology
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The Journal of Cell Biology 171 (2), 217-227, 2005-10-24
Rockefeller University Press
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詳細情報 詳細情報について
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- CRID
- 1362544418319795584
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- NII論文ID
- 30017413215
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- ISSN
- 15408140
- 00219525
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