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Peculiar behavior of distinct chromosomal DNA elements during and after development in the dicyemid mesozoan Dicyema japonicum
https://ir.soken.ac.jp/records/3626
https://ir.soken.ac.jp/records/362657480a46-fc3c-4524-bba6-35c9b4967dd5
| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||
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| 公開日 | 2013-06-25 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Peculiar behavior of distinct chromosomal DNA elements during and after development in the dicyemid mesozoan Dicyema japonicum | |||||||||||
| タイトル | ||||||||||||
| タイトル | Peculiar behavior of distinct chromosomal DNA elements during and after development in the dicyemid mesozoan Dicyema japonicum | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||
| 資源タイプ | journal article | |||||||||||
| アクセス権 | ||||||||||||
| アクセス権 | metadata only access | |||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||
| 著者 |
AWATA, Hiroko
× AWATA, Hiroko
× NOTO, Tomoko
× ENDOH, Hiroshi
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| 著者別名 |
粟田, ひろ子
× 粟田, ひろ子
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | The dicyemid mesozoans are obligate parasites that inhabit the cephalopod renal appendage. Dicyemids have a simple body, consisting of approximately 30 cells: one long cylindrical axial cell contains intracellular stem cells (called axoblast), from which embryos are derived, and is surrounded by some 30 peripheral somatic cells. Somatic cells divide at most eight times in their life span, and never divide after differentiation. During early somatic cell development, numerous unique DNA sequences are first amplified and then eliminated, in the form of extrachromosomal circular DNA, leading to genome reduction. In this study we demonstrate that the remaining sequences, single-copy genes and repetitive sequences, have very different fates. Single-copy genes, such as β-tubulin, are initially amplified, presumably via endoreduplication, but subsequently decrease in copy number through development, suggesting that the whole genome is initially amplified and then the amplified DNAs are simply diluted in successive cell divisions, with little DNA replication. In contrast, repetitive sequences are maintained even in terminally differentiated somatic cell nuclei. Considering the increasing intensity of in-situ hybridization, incorporation of BrdU, and a general correlation between nuclear content and cell size, those repetitive sequences must be selectively endoreplicated in the peripheral cell nucleus, concomitant with the increase of cell size. The biological significance of this mechanism is discussed as a unique dicyemid adaptation to parasitism. | |||||||||||
| 書誌情報 |
Chromosome Research en : Chromosome Research 巻 14, 号 8, p. 817-830, 発行日 2006-12 |
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| 出版者 | ||||||||||||
| 出版者 | SpringerLink | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||
| 収録物識別子 | 09673849 | |||||||||||
| PubMed番号 | ||||||||||||
| 識別子タイプ | PMID | |||||||||||
| 関連識別子 | 17139531 | |||||||||||
| DOI | ||||||||||||
| 識別子タイプ | DOI | |||||||||||
| 関連識別子 | http://doi.org/10.1007/s10577-006-1084-z | |||||||||||
| 関連名称 | 10.1007/s10577-006-1084-z | |||||||||||
| 権利 | ||||||||||||
| 権利情報 | SpringerLink(The original publication is available at www.springerlink.com) | |||||||||||
