論文 - 詳細
| RRC ID | 46564 |
|---|---|
| 著者 | Aruscavage PJ, Hellwig S, Bass BL. |
| タイトル | Small DNA pieces in C. elegans are intermediates of DNA fragmentation during apoptosis. |
| ジャーナル | PLoS One |
| Abstract |
While studying small noncoding RNA in C. elegans, we discovered that protocols used for isolation of RNA are contaminated with small DNA pieces. After electrophoresis on a denaturing gel, the DNA fragments appear as a ladder of bands, approximately 10 nucleotides apart, mimicking the pattern of nuclease digestion of DNA wrapped around a nucleosome. Here we show that the small DNA pieces are products of the DNA fragmentation that occurs during apoptosis, and correspondingly, are absent in mutant strains incapable of apoptosis. In contrast, the small DNA pieces are present in strains defective for the engulfment process of apoptosis, suggesting they are produced in the dying cell prior to engulfment. While the small DNA pieces are also present in a number of strains with mutations in predicted nucleases, they are undetectable in strains containing mutations in nuc-1, which encodes a DNase II endonuclease. We find that the small DNA pieces can be labeled with terminal deoxynucleotidyltransferase only after phosphatase treatment, as expected if they are products of DNase II cleavage, which generates a 3' phosphate. Our studies reveal a previously unknown intermediate in the process of apoptotic DNA fragmentation and thus bring us closer to defining this important pathway. |
| 巻・号 | 5(6) |
| ページ | e11217 |
| 公開日 | 2010-6-18 |
| DOI | 10.1371/journal.pone.0011217 |
| PMID | 20585459 |
| PMC | PMC2887891 |
| MeSH | 3' Untranslated Regions Animals Apoptosis* Caenorhabditis elegans / cytology Caenorhabditis elegans / genetics* DNA Nucleotidylexotransferase / metabolism DNA, Helminth / genetics* |
| IF | 2.74 |
| 引用数 | 6 |
| WOS 分野 | BIOCHEMISTRY & MOLECULAR BIOLOGY |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 2 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 線虫 | tm0890 tm1415 |